Overview

This complete front passenger seat wiring harness is a direct-fit electrical assembly intended for Citroën C4 II (B7) passenger seats. It routes power and signal connections between the vehicle body and seat-mounted components such as side airbags, seatbelt buckle sensors, occupancy/weight sensors, seat heating elements and electric adjustment motors where applicable. Frequently searched by part number 6505H4, this harness is aimed at professional technicians and experienced DIYers performing seat repairs or replacements.

Fitment And Function

• Purpose: Provides all necessary electrical connections for the front passenger seat systems (airbag, occupancy sensor, seatbelt buckles, heaters, motors).
• Compatibility: Citroën C4 II (commonly referenced as C4 B7) passenger front seat applications. Often listed under code 6505H4.
• Typical Symptoms When Faulty: Airbag warning light, seatbelt buckle/unfasten warnings, non-functioning seat heater, loss of power adjustment or intermittent faults and stored seat-related fault codes.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 II (B7) — Front Passenger Seat
• Product Codes: 6505H4
• Additional Numbers: No further OEM numbers provided

Installation Recommendation

• Safety First: Before starting work, disconnect the vehicle battery and wait the manufacturer-recommended time to allow SRS capacitors to discharge. Follow Citroën service instructions for SRS-handling to avoid inadvertent airbag deployment.
• Removal: Remove trim panels and bolts securing the seat, then carefully unplug seat electrical connectors and route retaining clips. Support the seat when detaching to avoid straining cables.
• Installation: Route the new harness exactly as the original, secure all clips, and ensure connectors are fully engaged with no visible pin damage. If connectors show corrosion, clean or replace them. Use dielectric grease on non-airbag terminals if appropriate. Refit the seat, reconnect the battery and clear any stored codes with a diagnostic tool after installation.
• Note: If the seat includes an airbag connector, maintain correct connector orientation and locking mechanism. Do not attempt to modify airbag wiring or connectors.

Common Failure Reasons

• Mechanical Wear: Repeated seat travel and adjustment can chafe wires against seat frames or trim, eventually breaking conductors.
• Connector Damage: Pins can bend, corrode or lose contact due to moisture ingress or previous improper handling during repairs.
• Stress And Flexing: Moving components such as reclining and sliding mechanisms place constant flexing stress on harnesses at pivot points.
• Aftermarket Modifications Or Repairs: Poorly routed or spliced wiring after previous repairs can fail prematurely.

Why This Part Matters

A functional seat wiring harness is critical for occupant safety systems and comfort features. Faults often trigger warning lights and can disable safety sensors. Replacing a damaged harness restores reliable electrical connections and maintains proper operation of airbags, seatbelt sensors and comfort functions.

Purchase Tip

Search engines and parts databases commonly index this item by code 6505H4 and by vehicle designation Citroën C4 II / C4 B7. For technicians, having the original connector layout and awareness of SRS procedures makes replacement straightforward and safe.

This complete front driver seat wiring harness (OEM code 6505G1) is designed to restore reliable electrical connections for seat adjustment motors, heating elements, occupancy sensors and airbag/seatbelt plug-ins on Citroën C4 II (B7) models. Built as a direct-fit replacement for worn or damaged seat loom assemblies, the harness helps eliminate intermittent power losses, erratic seat movement and SRS faults caused by broken wires or corroded terminals. Ideal for professional workshops and experienced DIY technicians, the harness is supplied to match original routing and connector interfaces for straightforward replacement.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 II (B7) – Front Driver Seat
• Product Codes: 6505G1
• Additional Numbers: –

Compatibility

Intended for Citroën C4 II (B7) front driver seat applications. Confirm fitment by matching the OEM code 6505G1 and connector shapes on the vehicle harness before installation. Suitable for seats with electric adjustment, seat heating and integrated occupancy/airbag connections.

Function

The seat wiring harness transmits power and signals between the vehicle body and the seat modules: electric motors for fore/aft, tilt and lumbar adjustments, heating elements, occupancy sensors, seatbelt buckle sensors and side airbag connectors where fitted. A correct harness ensures reliable control inputs and prevents SRS/airbag-related fault codes.

Replacement Procedure

• Park vehicle on level ground, engage parking brake and remove ignition key.
• Disconnect the negative battery terminal and wait at least 10 minutes to allow SRS capacitors to discharge.
• Remove trim covers and unbolt the seat from the vehicle floor. Carefully tilt or lift the seat to access under-seat connectors.
• Unplug all seat connectors, taking note of connector locations and retaining clips.
• Disconnect the old harness from seat components and remove any routing clips or tape securing it to the seat frame.
• Install the new harness following the original routing, secure all clips, reconnect each plug and ensure connectors engage fully.
• Refit the seat, torque bolts to manufacturer specification, reconnect the battery and verify seat functions: adjustment, heating and SRS indicator status.
• If airbag or seat belt warning lights remain, read and clear fault codes with an appropriate diagnostic tool and recheck connections.

Installation Recommendations

Always follow manufacturer safety procedures. If the harness includes SRS/airbag connectors, handle with extreme care and consider having the job performed or checked by a technician experienced with SRS systems. Use appropriate tools and, after reconnecting the battery, verify that no fault codes remain. Replace any damaged clips or foam that could allow chafing. Secure the harness so it does not interfere with moving parts of the seat.

Why Parts Most Commonly Fail

Seat wiring harnesses typically fail from mechanical fatigue at flex points where the seat moves. Repeated adjustment causes wires to fracture near pivot points, connectors can corrode from moisture, and insulation may abrade against metal edges or mounting hardware. Additional stress comes from aftermarket seat heaters or heavy-duty use. Symptoms include intermittent seat movement, loss of heating, airbag or seatbelt warning lights and visible damage to the loom or exposed wires.

Notes For Professionals

This part is aimed at professional mechanics and skilled DIYers who are familiar with vehicle electrical systems. After installation, perform a full function check and clear any diagnostic codes. If uncertain about SRS-related work, consult dealer documentation or specialized service equipment.

High-quality USB wiring harness designed for Citroën and Peugeot infotainment systems. This cable restores reliable USB data transfer and charging functionality in vehicles where the factory USB lead has been damaged, corroded or worn. Ideal for professional workshops and experienced DIY mechanics, the harness is compatible with vehicles listed below and is often identified by product codes 9671138380 or 6574SV.

Key Features

• Direct replacement USB harness for infotainment and media ports.
• Supports data transfer and charging for USB devices (phone, media stick).
• Original-style connector interfaces for straightforward installation.
• Durable insulation and connector housings to resist wear from repeated use.
• Marked with product codes 9671138380 and 6574SV for quick identification.

How It Works

The harness carries USB power and USB data lines between the vehicle head unit or media interface and the visible USB socket in the dash, glovebox or center console. A good connection ensures the head unit recognizes mass storage devices and smartphones for audio playback and charging. Faulty wiring or connectors cause intermittent recognition, slow/no charging or complete loss of USB function.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C4 B7; Peugeot 308 (as listed)
• Product Codes: 9671138380, 6574SV
• Additional Numbers: 6574SV

Installation Recommendations

• Prepare Tools: Trim removal tools, Phillips/flat screwdriver set, and a multimeter for verification.
• Safety: Disconnect the vehicle battery before starting work to reduce the risk of short circuits and protect electronic modules.
• Access: Remove the relevant trim or glovebox/center console panels to reach the OEM connector. Use plastic trim tools to avoid damaging clips and panels.
• Replacement: Unplug the old harness from the head unit and the USB socket. Route the new harness following the original cable path, secure with existing clips or cable ties, and connect both ends firmly.
• Verification: Reconnect the battery, power up the infotainment system and test USB data recognition and charging with a known-good device before reassembling all trim.
• Best Practice: Avoid sharp bends and pinching of the cable. Ensure connectors fully seat with audible click; inspect for any corrosion on the mating contacts.

Why This Part Most Often Fails

• Mechanical Wear: Repeated insertions and removals of USB plugs lead to connector fatigue and broken pins.
• Physical Damage: Caught or crushed wiring during seat or console adjustments can sever conductors.
• Moisture and Corrosion: Exposure to spilled liquids or humid conditions causes contact corrosion and intermittent faults.
• Poor Routing or Installation: Incorrect routing that allows rubbing against sharp edges causes insulation wear and short circuits.
• Manufacturing/Connector Fatigue: Solder joints or crimp connections may crack over many thermal cycles and vibrations.

Troubleshooting Tips

• If USB Is Not Recognized: Check connector seating, inspect for bent pins, and measure 5V supply at the socket with a multimeter.
• If Charging Is Slow: Verify the 5V supply is present and that data lines are intact; some head units negotiate charging current based on data line state.
• Intermittent Connection: Wiggle-test the cable and connectors with the head unit connected to locate a loose contact or broken conductor.

Suitable For

Recommended for mechanics and experienced DIY enthusiasts working on Citroën C4 B7 and vehicles listed as compatible (including Peugeot 308 as provided). Use the product codes 9671138380 and 6574SV to confirm the correct harness when searching parts catalogues or service documentation.

Note

When fitting this replacement harness, follow vehicle-specific disassembly procedures and torque/fastening recommendations from the manufacturer to avoid damage to trim and electronic components.

Overview

This front passenger seat wiring harness (part code 6545XX) is designed for direct replacement in Peugeot 3008 T84 and Peugeot 5008 T87 vehicles. Built to route and connect seat adjustment motors, heaters, occupancy sensors and airbag/seatbelt circuits where fitted, the harness restores electrical functionality of the seat assembly. Ideal for professional workshops and experienced DIY mechanics who search by part number when sourcing replacements.

Key Benefits

• Direct Fit For Vehicles Specified: Saves time compared with custom repairs or splicing.
• Restores Full Seat Functionality: Powers motors, heating elements, sensors and safety circuits where applicable.
• Suitable For Mechanics And Competent DIYers: Clear routing and connector locations speed up installation.
• Part Number Search Friendly: Frequently found in catalogs and diagnostics under 6545XX.

How The Part Works

The wiring harness collects all electrical connections for the front passenger seat into a single, routed loom. It transmits power and signals between the vehicle body harness and seat components such as adjustment motors, seat heating elements, occupancy sensors and airbag/seatbelt connectors (when present). Proper routing and secure connector engagement are essential to maintain reliable function and avoid electrical faults or airbag warning lights.

Replacement Procedure

• Disconnect Battery: Always disconnect the negative battery terminal and wait the manufacturer-recommended time to deactivate airbag circuits.
• Remove Trim And Access Seat Base: Remove plastic covers and any under-seat trim to access the harness routing and connectors.
• Unplug Connectors: Carefully release retaining clips and unplug all seat-to-car connectors. Note connector orientation for reassembly.
• Remove Old Harness: Unclip the harness from brackets and guide channels, then extract it from under the seat and through seat frames as required.
• Install New Harness: Route the new harness following original clips and channels. Ensure no sharp edges pinch the loom and that movement zones remain free.
• Reconnect And Test: Reconnect all plugs, reattach trim, reconnect the battery and verify seat adjustment, heating and safety-related indicators. Clear any stored fault codes with appropriate diagnostic equipment if necessary.

Technical Information

• Manufacturer: Stellantis / Peugeot
• Model: Peugeot 3008 T84; Peugeot 5008 T87
• Product Codes: 6545XX
• Additional Numbers: No additional numbers provided

Installation Recommendations

• Always Disconnect The Battery Before Starting Work To Prevent Airbag Deployment And Electrical Damage.
• Follow Original Routing And Secure All Clips To Prevent Abrasion And Noise From Moving Parts.
• Inspect Connectors For Corrosion Or Bent Pins Before Reassembly; Replace Damaged Clips Or Grommets To Maintain Sealing.
• After Installation, Verify Airbag And Seat Belt Warning Lights Remain Off; Use A Diagnostic Tool To Read And Clear Fault Codes If Required.
• When In Doubt About Airbag Or Safety-Critical Connections, Prefer Workshop Procedures And Manufacturer Instructions.

Why This Part Usually Fails

Seat wiring harnesses commonly fail due to mechanical fatigue and abrasion from constant seat movement. Repeated sliding and reclining causes wires to flex where they pass through seat frames and hinges, eventually leading to broken conductors or intermittent connections. Other frequent causes include connector corrosion from moisture ingress, damage during previous repairs or seat removal, and melted insulation from localized heating faults. Failure symptoms include loss of seat adjustment, heater function, or activation of airbag/seatbelt warning lamps.

Notes For Buyers

Search By Part Number (6545XX) To Speed Up Identification. Suitable For Use By Professional Mechanics And Experienced DIY Enthusiasts Familiar With Seat Electronics And Safety Precautions.

This high-quality USB wiring harness is designed for safe and reliable connection between the vehicle USB socket and the vehicle’s head unit or USB box. Ideal for professional workshops and experienced DIY mechanics, the cable delivers both data and power connectivity for media playback, device charging and software updates where supported by the vehicle system. Clear OEM part references (9687949180, 6586ZS) make it easy to locate the correct replacement during diagnostics or parts ordering.

Technical Information

• Manufacturer: Stellantis
• Model: USB Box Wiring Harness / USB Connector Cable
• Product Codes: 9687949180, 6586ZS
• Other Numbers: 6586ZS | 9687949180

Typical Fitment

Designed for use with Citroën and Peugeot vehicles equipped with a USB BOX port. Commonly fitted to certain Peugeot 308 variants and other compatible Stellantis infotainment installations. Check the vehicle’s existing connector shape and part number before installation.

Function and Application

The harness provides a direct electrical and data link between the vehicle’s USB socket and the infotainment or multimedia controller. It carries power for device charging and data lines for audio streaming, phone integration and firmware upload (where the head unit supports these functions). The cable length of 640 mm offers flexible routing options within the dashboard or center console area.

Installation Recommendations

• Always disconnect the vehicle battery before starting work to avoid short circuits and protect vehicle electronics.
• Access the USB BOX or head unit by removing the appropriate trim panels or the glovebox/center console as required for the specific model.
• Carefully unplug the old harness from the head unit and USB module; avoid pulling on the wires—use the connector body.
• Route the new cable following the original harness path, securing it with clips or ties to prevent chafing or contact with sharp edges.
• Ensure connectors are fully seated and locked; reassemble trim and perform a functional test of USB data and charging after reconnecting the battery.
• If the vehicle requires coding or unit reconfiguration after replacement of related modules, perform these operations with appropriate dealer-level tools.

Why This Part Fails Most Often

• Mechanical Stress: Repeated plugging/unplugging or movement of the cable can cause wire fatigue or connector damage.
• Connector Damage: Bent pins, loose contacts or broken locking tabs prevent reliable electrical connection.
• Ingress And Corrosion: Moisture or contaminants entering the connector can corrode contacts and disrupt data/power flow.
• Chafing And Abrasion: Poor routing can lead to insulation wear and eventual short circuits.

For workshops and experienced DIY users, this USB BOX interconnection cable is a straightforward replacement that restores USB connectivity when fitment and part numbers match. Use the OEM references 9687949180 and 6586ZS when ordering to ensure compatibility with the vehicle’s multimedia system.

This high-quality wiring harness is designed for the front passenger seat of the Peugeot 308 T7 and carries all electrical connections between the seat modules and the vehicle body. Ideal for professional workshops and competent DIY mechanics, the harness restores reliable electrical operation for seatbelt buckles, occupancy sensors, airbags, seat heaters and powered seat motors (when fitted). Frequently searched by its product codes, this part helps eliminate intermittent faults, SRS warnings and non-functioning seat adjustments caused by damaged or worn wiring.

Technical Information

• Manufacturer: Stellantis (Peugeot/Citroën)
• Model: Peugeot 308 T7
• Product Codes: 6509VW1, 6509W1
• Additional Numbers: 6509VW1

Function

The wiring harness routes and secures electrical signals and power for the front passenger seat. Typical circuits carried include the passenger airbag/occupancy sensor, seatbelt buckle switch, seat heating elements, motorized seat adjustment circuits and associated ground/communications lines. A sound harness ensures correct SRS operation, accurate occupancy detection and reliable comfort features.

Common Failure Causes

Seat wiring harnesses most commonly fail due to mechanical fatigue where the harness passes through the seat frame or body grommet. Repeated seat travel causes chafing and broken conductors. Other frequent causes are connector damage during previous repairs, corrosion from moisture ingress, rodent damage and crushed or pinched cables after seat removal/installation.

Replacement Procedure

Basic steps for replacement (for experienced technicians and competent DIYers):

• Disconnect the negative battery terminal and wait for the vehicle’s SRS capacitors to discharge before touching airbag connectors.
• Remove seat trim and bolted seat components to access harness routing and connectors.
• Unplug seat electrical connectors carefully, taking note of clip locations and connector orientations.
• Feed the new harness along the original routing, secure with clips and grommets, and ensure no tension points or contact with sharp edges.
• Reconnect all connectors, refit trim and torque seat bolts to manufacturer specification.
• Reconnect the battery and verify seat functions: SRS/airbag status, seatbelt sensor, heating, and electrical adjustments. Use a diagnostic tool to clear or confirm fault codes if necessary.

Installation Recommendations

Always follow manufacturer procedures and safety rules. Use appropriate trim tools to avoid damaging connectors and plastic fasteners. Inspect mating connectors and pins for corrosion or damage; replace or repair as needed. Secure the harness with original-style clips and ensure grommets are in place to prevent chafing. After installation, verify SRS and comfort system operation with a suitable diagnostic scanner and confirm no persistent fault codes remain.

Why Replace This Part

Replacing a damaged seat wiring harness restores safety-related functions and comfort features. Faulty harnesses often cause SRS warnings, disabled seat heaters, intermittent seat adjustment or persistent seatbelt buckle warnings—problems that affect vehicle safety and occupant comfort. Installing a correct harness with the right product code (6509VW1 / 6509W1) ensures compatibility with the Peugeot 308 T7 seat assemblies.

Notes For Professionals

Search by product code (6509VW1 or 6509W1) for fast identification. When working with SRS circuits, take extra care to avoid static discharge and do not probe live airbag connectors without isolating the system. If in doubt about SRS faults or occupancy sensor calibration, use the appropriate diagnostic tool to verify system status after replacement.

Product Overview

This used wiring harness is designed for the front driver’s seat of the Citroën C4 Picasso and connects the seat heating elements and driver airbag circuits to the vehicle wiring. Ideal for professional mechanics and DIY enthusiasts, the harness is often searched for by its product codes (6505T6, 5243566, 243566). Replacing a faulty seat harness restores seat heating function and airbag connection integrity, improving comfort and safety.

Features And Function

• Seat Heating Connection: Provides power and ground routing for seat heater elements.
• Airbag Circuit Integration: Includes dedicated conductor/connector for driver airbag deployment circuit.
• OEM Fitment: Designed to match factory connectors and routing for straightforward replacement on Citroën C4 Picasso seats.
• Common Search Terms: Citroën C4 Picasso seat harness, driver’s seat wiring loom, 6505T6, 5243566, 243566.

Replacement Procedure

1. Prepare Workspace: Park vehicle on level ground, engage parking brake and remove ignition key.
2. Disconnect Battery: Always disconnect the negative battery terminal and wait at least 2 minutes to reduce risk of accidental airbag deployment.
3. Remove Seat: Unbolt the driver’s seat from the vehicle floor according to manufacturer instructions to gain access to under-seat connectors and the seat frame.
4. Disconnect Connectors: Carefully unplug seat harness connectors (airbag, heater, sensors). Mark connector positions if needed for reassembly.
5. Replace Harness: Detach the old harness from clips and guides, route the new harness following the original path, and secure with clips or ties as required.
6. Reconnect And Test: Reconnect all seat connectors, bolt seat back in place, reconnect battery, and perform a system check (airbag warning lamp, heater activation) using appropriate diagnostic tools.

Installation Recommendations

• Battery Safety: Disconnect the battery before starting work to avoid airbag deployment or electrical damage.
• Use Proper Tools: Use correct trim and connector tools to avoid damaging clips and terminals.
• Inspect Connectors: Check mating connectors and pins for corrosion or damage; repair or replace as necessary for reliable operation.
• Secure Routing: Ensure the harness is routed away from sharp edges and moving parts and secured with clips to prevent chafing.
• Diagnostic Check: After installation, verify airbag circuit readiness and seat heating operation with a diagnostic scanner when available.

Most Common Failure Reasons

• Mechanical Fatigue: Repeated seat movement causes cable flexing at hinge points, leading to broken wires or intermittent connections.
• Connector Corrosion: Moisture or spilled liquids can corrode pins and sockets, disrupting circuits for the heater or airbag.
• Physical Damage: Abrasion, pinching, or impact during previous repairs or seat removal can damage the harness insulation or terminals.
• Faulty Contacts: Worn or loose terminals produce intermittent faults, affecting heater performance or triggering airbag warnings.

Technical Information

• Manufacturer: Valeo
• Model: Citroën C4 Picasso
• Product Codes: 6505T6, 5243566
• Other Numbers: 243566, NFP

Target Audience

Designed for professional auto technicians and experienced DIYers working on Citroën C4 Picasso vehicles. This harness is a practical replacement part when seat heating or airbag seat connection faults are present.

Product Overview

This wiring harness is a complete front passenger seat loom designed for Citroën C4 Picasso models. It integrates the electrical circuits for seat heating and the passenger airbag connection, including the necessary connectors and mounting points. The harness is intended for replacement of damaged or worn original seat wiring to restore safety and comfort functions.

Fitment And Application

Intended For: Citroën C4 Picasso (commonly fitted to first generation C4 Picasso models). Always compare part numbers to the original harness on the vehicle. Typical applications include vehicles where seat heating no longer operates or where the airbag warning lamp indicates a passenger airbag circuit fault.

How It Works

The harness carries power and signal lines between the vehicle wiring loom and the passenger seat modules. Key functions covered by this harness include:

• Seat Heating: Supplies power to the heating elements in the seat cushion and backrest and routes control signals from the cabin switches.
• Passenger Airbag: Provides the electrical connection for the passenger airbag module and the passenger presence sensor circuits where applicable.

How To Replace

Replacement requires basic mechanical skills and attention to safety due to the airbag circuit. Typical procedure:

• Disconnect The Battery And Wait: Always disconnect the negative battery terminal and wait several minutes to allow capacitors in the restraint system to discharge before touching airbag connectors.
• Remove Seat: Unbolt and move the seat to gain access to the underside and seat rail covers. Note bolt torque and position.
• Unplug Connectors: Carefully release and unplug all electrical connectors under the seat, observing any locking tabs to avoid damage.
• Remove Old Harness: Detach clips and routing ties, remove the old harness from seat frame and rails.
• Fit New Harness: Route the new harness following original paths, secure with clips/ties, connect all plugs and ensure connectors are fully engaged and locked.
• Refit Seat And Test: Reinstall the seat, reconnect the battery, and verify seat heating operation and that the airbag warning light behaves correctly (no persistent fault lamp).

Installation Recommendations

– Work In A Clean, Static-Free Area And Follow Safety Rules For SRS Systems.
– Use Correct Tools To Release Connector Locks Without Damaging Pins.
– Protect The Harness From Sharp Edges And Moving Parts; Use Additional Sleeving Or Tape Where Needed.
– After Installation, Perform Basic Function Checks: Seat Heater Operation And Airbag Indicator. If A Fault Code Persists, Read Faults With Appropriate Diagnostic Equipment.

Technical Information

• Manufacturer: Valeo
• Model: Citroën C4 Picasso
• Product Codes: 6505W1, 5243584, 243584
• Additional Numbers: NFP

Why The Part Fails

Common causes of wiring harness failure include abrasion where the harness rubs on seat frame or rail, connector corrosion from moisture ingress, damage from previous repairs or seat removal, and rodent chewing. Repeated seat movement can fatigue wires and break insulation, producing intermittent faults or complete loss of heating and airbag signal continuity.

Recommended For

This harness is suitable for professional workshops and experienced DIY enthusiasts who are comfortable working with vehicle electrical systems and SRS safety components. Proper handling and following safety steps are essential to avoid damage to the restraint system.

Why Choose This Part

Replacing a defective seat harness restores seat heating functionality and eliminates airbag circuit faults caused by damaged wiring or connectors. Using a correctly matched harness with the right connectors ensures reliable electrical contact and simplifies reinstallation.

Notes

Compare The Listed Product Codes With The Original Part To Confirm Fitment. If Diagnostic Trouble Codes Remain After Replacement, Use Appropriate Diagnostic Equipment To Clear And Verify The System.

This genuine-style tailgate wiring harness is designed for the rear hatch of the Citroën C4 Picasso (first generation) and carries the original product references 9658919280 and 6534QZ. It supplies switches and lighting for the tailgate area and routes signals and power to rear hatch components. Ideal for professional workshops and DIY mechanics looking to restore reliable electrical function to the rear hatch, this harness helps eliminate intermittent faults caused by broken conductors or corroded connections.

Technical Information

• Manufacturer: Stellantis / Citroën
• Model: Citroën C4 Picasso (First Generation)
• Product Codes: 9658919280, 6534QZ
• Additional Numbers: 6534 QZ (alternate formatting)

Compatibility

Fits Citroën C4 Picasso first generation rear tailgate applications. Confirm compatibility by checking the part numbers 9658919280 or 6534QZ against the vehicle’s original harness label and the equipment fitted to the hatch (e.g., tilting rear window, license plate illumination).

Function

• Provides electrical connection for rear glass switches and tailgate locking/unlocking mechanisms.
• Supplies power to license plate illumination and other hatch-mounted lights.
• Routes signals for rear-hatch accessories depending on vehicle equipment (wiper, heated rear window, central locking, etc.).

Replacement Procedure

1. Disconnect The Battery Before Work To Prevent Short Circuits And Protect Vehicle Electronics.
2. Open The Tailgate And Remove Interior Trim Panels Carefully To Access The Harness And Connectors.
3. Disconnect All Tailgate Electrical Connectors And Any Retaining Clips Or Grommets Securing The Harness.
4. Feed The New Harness Through The Factory Grommet, Reroute Along Original Clips And Fasteners To Avoid Pinching.
5. Reconnect All Plugs, Ensure Firm Seating, Reassemble Trim Panels And Reconnect The Battery.
6. Test All Functions (Locks, Lights, Rear Window Switch, Wiper, Defogger) Before Final Assembly.

Installation Recommendations

• Always Disconnect The Battery Before Starting Work.
• Use A Dielectric Grease On Exposed Connectors To Reduce Corrosion Risk.
• Replace Any Damaged Grommets To Maintain A Watertight Seal Where The Harness Passes Through The Tailgate Seal.
• Secure The Harness With Original-Style Clips To Prevent Chafing; Avoid Sharp Bends At Hinge Areas.
• Verify Connector Pin Alignment And Ensure No Bent Pins Before Mating Plugs.
• Test All Electrical Functions Thoroughly Before Reinstalling Interior Panels.

Most Common Failure Causes

• Repeated Flexing At The Tailgate Hinge Causing Wire Breaks In The Bending Zone.
• Corrosion Of Connectors Due To Water Ingress Or Damaged Grommets.
• Physical Damage When Loading Cargo Or During Trim Removal/Installation.
• Wear From Age And Environmental Exposure Leading To Intermittent Contacts.

Replacing the harness with the correct code (9658919280 / 6534QZ) restores reliable electrical performance to the rear hatch and prevents recurring faults caused by broken conductors or poor grounding. For technicians, careful routing and sealing at the grommet are the most important steps to ensure long-term reliability.

Overview

This genuine-quality wiring harness connects the front fog lamps and parking sensors on first-generation Citroën C4 Picasso and Grand C4 Picasso models. Designed for professional mechanics and DIY enthusiasts, the harness carries power and signal lines between the vehicle loom, fog lights and ultrasonic parking sensors, ensuring reliable operation of lighting and parking aid functions.

Features and Function

The harness provides dedicated circuits and factory-style connectors for fog lamps and front parking sensors. It routes power, ground and sensor signal lines with factory-compatible plugs to maintain correct sensor communication and lighting behavior. Commonly searched by part numbers, this assembly simplifies replacement when front-end components are removed or when wiring damage prevents proper operation.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model(s): Citroën C4 Picasso (First Generation), Citroën Grand C4 Picasso (First Generation), Peugeot 3008 I (where applicable)
• Product Codes: 9663255080, 6575Y2
• Additional Numbers: NFP

Installation Recommendations

Always Disconnect The Battery Before Starting Work. Access Typically Requires Removal Of The Front Bumper Or Lower Trim To Reach Connector Plugs And Routing Clips. Remove The Old Harness From Its Retaining Clips, Unplug All Connectors From Fog Lamps And Sensors, Then Route And Secure The New Harness Following The Original Cable Paths. Reconnect All Plugs Firmly And Test Fog Lights And Parking Sensors Before Reassembling The Bumper. Use Dielectric Grease On Exposed Connectors To Reduce Corrosion Risk. If Any Electronic Warning Lights Appear After Installation, Recheck Connections And Clear Fault Codes With A Diagnostic Tool.

Common Failure Causes

Wiring harness failures most often result from Water Ingress, Corrosion At Connectors, Mechanical Damage Caused By Impacts Or Chafing Against Sharp Edges, And Rodent Chewing. Repeated Front-End Repairs Or Bumper Replacements Can Also Stretch Or Damage The Loom Over Time. Symptoms Include Intermittent Or Non-Working Fog Lamps, Faults In Parking Sensor Readings, Or Permanent Fault Codes Related To The Sensor Circuit.

Why Choose This Harness

Choosing a correct-fit wiring harness by exact product code (9663255080 / 6575Y2) reduces installation time and avoids unreliable splicing or temporary fixes. The part is suitable for professional repair shops and competent DIYers who require OEM-style connections and a plug-and-play replacement when vehicle wiring has been compromised.

Notes

Searches For This Part Are Frequently Carried Out Using The Product Codes Listed Above. Ensure Visual Match With Existing Connectors And Clip Locations During Installation.