Product Overview

Direct replacement refrigerant pipe designed for Citroën C4 Picasso models equipped with the RH02 engine. Supplied with the OE cross-references 9681781280 and 6477H9, this air conditioning line restores proper refrigerant flow between AC components and helps bring the system back to correct pressure and cooling performance. Ideal for professional workshops and experienced DIY mechanics who require a reliable part that exactly matches OE fitment numbers.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 Picasso
• Product Codes: 9681781280, 6477H9
• Additional Numbers: 6477H9 | 9681781280

Function And Application

This refrigerant pipe is a part of the vehicle’s air conditioning circuit. Its role is to transport refrigerant between components (compressor, condenser, evaporator and receiver/drier) under the required operating pressures and temperatures. Proper sealing and corrosion resistance are essential to prevent leaks and maintain system efficiency.

Typical Failure Modes And Service Life

Failures usually occur through gradual deterioration: corrosion, mechanical damage from road debris or impact, chafing against adjacent parts, or degraded O-rings and seals at the connections. Vehicles exposed to salty roads or harsh environments are more prone to leaks. There is no fixed replacement interval; pipes commonly fail on higher-mileage or older cars (for example after several years of service), but should be inspected whenever the AC system loses cooling performance or when other components are replaced.

Installation Recommendations

Recommended procedure for replacement (intended for qualified technicians or experienced DIYers with proper equipment):

• Recover Refrigerant Safely: Recover the refrigerant using an R134a/R1234yf recovery/recycle machine in compliance with local regulations.
• Access And Remove: Remove any obstructing components to gain access to the pipe. Carefully disconnect fittings; mark routing to ensure correct refit.
• Replace Seals: Always replace O-rings/seals at each connection with correctly sized, lubricant-coated new O-rings compatible with the system oil and refrigerant.
• Install New Pipe: Fit the new pipe and tighten connections to manufacturer recommended procedures. Avoid kinking or undue stress on the line.
• Evacuate And Charge: Evacuate the system to remove moisture and air, then charge with the correct refrigerant type and specified oil quantity. Perform leak and pressure checks.
• Final Checks: Start the engine and confirm proper system pressures and cooling performance. Re-inspect fittings after a short test drive.

Important: Refrigerant handling requires certified equipment and adherence to safety and environmental rules. If you are not equipped to recover and recharge the AC system, entrust this step to a qualified workshop.

Why The Part Is Often Replaced

Most replacements are due to refrigerant leaks that cause loss of cooling, often detected as reduced AC performance or visible oil traces around pipe joints. Corrosion at the pipe or fittings, damage from road debris, or hardening of connection O-rings are the most common root causes. Replacing the pipe and seals together addresses the leak source and prevents repeat failures.

Compatibility And Fitment Tips

Fitment is intended for Citroën C4 Picasso vehicles with the RH02 engine that use the OE references listed above. Always verify the part numbers stamped on the original pipe against the product codes 9681781280 / 6477H9 to ensure direct compatibility with your vehicle model and year.

Buying Advice

Choosing a direct-fit pipe with the correct OE numbers minimizes installation time and reduces the risk of leaks. For a long-lasting repair, replace connection O-rings, inspect surrounding AC components (compressor, condenser, dryer/accumulator), and ensure the system is properly evacuated and charged.

This genuine-style air conditioning pipe is designed as a direct-fit replacement for a range of Peugeot and Citroën models. Ideal for professional workshops and experienced DIY technicians, the pipe restores proper refrigerant routing and system integrity after damage or degradation. Frequently searched by OE numbers, this part provides a reliable repair option when the original line is cracked, corroded or leaking at connections. Using the correct replacement pipe helps maintain system pressure, reduces risk of compressor damage and ensures efficient cabin cooling.

Technical Information

• Manufacturer: Stellantis (Peugeot / Citroën)
• Model: Peugeot 308, 3008, 5008, RCZ; Citroën C4, C4 II, C4 Picasso
• Product Codes: 9684755680, 6477H8
• Other Numbers: Commonly referenced under OE numbers 9684755680 / 6477H8

Installation Recommendations

Replacement of an air conditioning pipe should be performed by a qualified technician or an experienced DIYer with the correct tools. Recommended steps:

1. Recover Refrigerant: Evacuate and recover refrigerant using approved recovery equipment in accordance with local regulations.
2. Depressurize System: Ensure the system is fully depressurized before opening any fittings.
3. Access And Remove: Gain access to the faulty pipe (may require removal of engine covers, intake components or battery depending on model). Loosen and remove fittings at both ends, retaining any reusable brackets if undamaged.
4. Replace Seals: Always replace O-rings/seals at each connection with new, correct-size refrigerant-rated O-rings lubricated with the correct PAG oil type.
5. Install Pipe: Fit new pipe and torque fittings to manufacturer specification to avoid leaks or deformation.
6. Vacuum And Recharge: Evacuate system to required vacuum level, perform leak check, then recharge with the correct refrigerant type and oil quantity per vehicle specification.
7. Functional Test: Run the A/C system, check pressures and verify cooling performance and leak-free operation.

Always follow manufacturer safety procedures. Wear protective gloves and eye protection when working with refrigerant and pressurized systems.

Why This Part Most Often Fails

Air conditioning pipes commonly fail due to a combination of factors: corrosion from road salts or moisture on metal sections, mechanical damage from impacts or debris, and seal/O-ring deterioration at connection points. Vibration and thermal cycling over years can lead to fatigue at bends or joints. In vehicles exposed to harsh climates or where the pipe routing is close to moving components, the risk of chafing or puncture increases. When a leak develops, the system loses refrigerant and oil, which can quickly lead to compressor overheating and reduced cooling performance.

Practical Notes

OE Part Numbers Are Often Used By Technicians When Searching For This Component. When replacing, ensure you fit new O-rings and follow correct evacuation/recharge procedures to protect the rest of the A/C system. This pipe is commonly fitted across several Peugeot and Citroën models listed above and is a standard repair item in cooling, heating and air conditioning maintenance.

Direct-fit air conditioning tube designed for Stellantis vehicles from the Citroën and Peugeot families. This climate pipe (common references 9684368380, 6477F4, 9831991080, 9819864880) routes refrigerant within the A/C circuit and is suitable for a range of models including Peugeot 308, 3008, 5008 and RCZ as well as Citroën C4 variants and C4 Picasso. Built to OEM mounting points and connection geometries, it helps restore proper refrigerant flow and prevents leaks that cause loss of cooling performance. Ideal for professional workshops and experienced DIYers performing A/C repairs or component replacements.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: PEUGEOT 308, 3008, 5008, RCZ; CITROËN C4, C4 II, C4 PICASSO
• Product Codes: 9684368380, 6477F4, 9831991080, 9819864880
• Additional Numbers: (T84), (T87), R134A

Function And Application

The tube is a fixed pipe/hose element of the vehicle air conditioning system that transports refrigerant between components such as the condenser, evaporator, compressor and receiver-drier/accumulator. It ensures leak-free routing under operating pressure and temperature while maintaining correct bend radii and mounting clearances specific to the vehicle models listed.

Replacement Procedure (Overview)

Replacement of the A/C tube should be performed by qualified personnel or skilled DIY mechanics with proper equipment. Typical steps:

• Recover Refrigerant: Safely evacuate and recover the R134a refrigerant using certified recovery equipment.
• Access And Remove: Remove any protective covers or brackets to access the tube. Undo fasteners and quick-connect fittings. Keep track of clamps and mounting hardware.
• Inspect And Replace Seals: Replace all O-rings and sealing elements on connections with correctly sized, lubricated O-rings (use compatible PAG oil) to ensure proper sealing.
• Install New Tube: Fit the new tube into position, secure brackets and connectors to OEM torque where specified, and ensure proper routing without kinks or contact with moving parts.
• Vacuum And Recharge: Evacuate the system to remove moisture and air, then recharge with the correct type and quantity of refrigerant (R134a) to manufacturer specifications.
• Leak Test And Function Check: Perform a pressure/leak test and verify cooling performance and system pressures during operation.

Installation Recommendations

• Always use certified refrigerant recovery and charging equipment; do not vent refrigerant to atmosphere.
• Replace O-rings at every sealing connection and lubricate them with the correct oil (PAG) to prevent leaks.
• Inspect adjacent components (compressor, condenser, receiver-drier, expansion valve) for damage or contamination; contaminated oil/detritus can damage the new tube.
• Perform a vacuum and leak test after fitting and before final charging. Verify system pressures and temperatures with diagnostic gauges.
• Follow vehicle manufacturer procedures and torque values for clamps and fittings where available.

Why This Part Most Often Fails

Common failure causes for A/C tubes include corrosion (especially in regions with road salt or high humidity), mechanical damage from road debris or incorrect routing, degradation of O-rings and seals leading to slow leaks, and stress from vibration or improper mounting. Contamination inside the A/C system (moisture, debris, or degraded oil) can accelerate wear and lead to blockages or localized corrosion. Failures typically occur after several years of service, but life expectancy depends on driving conditions and maintenance history.

Notes For Buyers

Use the product codes listed above (9684368380, 6477F4, 9831991080, 9819864880) when searching for exact matches. This item is intended for vehicles using R134a refrigerant. For best results, pair replacement of the tube with inspection or replacement of the receiver-drier/accumulator and replacement of O-rings.

Product Description

This air conditioning refrigerant pipe is a direct-fit solution for Citroën C4 Grand Picasso models equipped with the 1.6 HDi 9HZ engine and compatible variants. Frequently searched by OE numbers 9653505780 and 6477D5, the part connects key HVAC components and ensures reliable refrigerant circulation between condenser, evaporator and compressor. Designed for professional workshops and skilled DIYers, the description below highlights fitment, function, cause of failure and practical installation tips to help you decide and install with confidence.

Function And Application

The climate pipe routes refrigerant within the vehicle’s air conditioning system and maintains system pressure and flow. It supports the heat-exchange process that cools the passenger cabin and works in conjunction with hoses, fittings, O-rings and mounting brackets. Proper sealing and correct routing are essential to avoid leaks, loss of cooling performance or compressor damage.

Fitment And Compatibility

Main Fitment: Citroën C4 Grand Picasso (models with 1.6 HDi 9HZ engine). Cross-reference OE Numbers: 9653505780, 6477D5. The part is commonly searched by these product codes, so entering them in search fields will help you locate the correct item quickly. Verify model year and engine code against your vehicle documentation before installation.

Installation Recommendations

• Recover Refrigerant Safely: Always evacuate and recover A/C refrigerant using approved service equipment before disconnecting the pipe.
• Replace Sealing Elements: Fit new O-rings and seals at all connections. Lubricate O-rings with the correct PAG oil specified by the manufacturer to ensure proper sealing.
• Torque And Routing: Reuse original mounting points and clamps. Tighten fittings to the manufacturer’s torque values to avoid distortion or leaks.
• Leak And Pressure Test: Perform a pressure/leak test after installation. Use electronic leak detection or UV dye as appropriate.
• Evacuate And Recharge: Evacuate the system to the recommended vacuum level and recharge with the refrigerant type and quantity specified by the vehicle manufacturer.
• Professional Service Recommended For Refrigerant Handling: Handling refrigerant requires certified A/C service equipment and, in many jurisdictions, certified technicians.

Most Common Causes Of Failure

Climate pipes typically fail due to corrosion, mechanical damage or deteriorated seals. Common failure modes include:

• Corrosion from road salt or moisture leading to pinhole leaks.
• Vibration and chafing where the pipe contacts brackets or nearby components, causing cracks.
• Age-related hardening or compression of O-rings and sealing surfaces resulting in refrigerant leaks.
• Impact damage from road debris or improper previous installations.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 Grand Picasso
• Product Codes: 9653505780, 6477D5
• Additional Numbers: 6477D5 | 9653505780

Notes For Purchase

Searchable by OE numbers 9653505780 and 6477D5 — enter these codes to quickly find the correct item. Ensure engine code (1.6 HDi 9HZ) and vehicle model match the listing before ordering. If replacing the pipe, plan to replace O-rings and perform a full evac/recharge cycle to restore correct system function and longevity.

This air conditioning pipe is designed specifically for the Citroën C4 Picasso, including the Grand Picasso 1.6 HDI 9HR engine version. It plays a critical role in the vehicle’s HVAC system by transporting refrigerant between components, ensuring efficient cooling inside the cabin.

Over time, air conditioning pipes can degrade due to corrosion, wear, or leaks, which may cause reduced cooling performance or complete system failure. Replacing this pipe restores the integrity of the air conditioning system, improving comfort and preventing costly repairs.

Installation Tips

Replacement involves safely discharging the refrigerant, removing the damaged pipe, and installing the new unit while checking for proper sealing to avoid refrigerant loss. It is recommended to handle refrigerants according to environmental and safety regulations and to inspect other A/C components during service.

Technical Information

• Manufacturer: PSA Group (Citroën / Peugeot)
• Model: Citroën C4 Picasso, Grand Picasso 1.6 HDI 9HR
• Product Codes: 9670621580, 6477GN
• Additional Numbers: Compatible with specific OEM references for efficient replacement

This air conditioning pipe is a direct-fit climate tube designed for Citroën C4 Picasso and Grand C4 Picasso models equipped with the 2.0 HDi (RHR) engine. Ideal for professional workshops and skilled DIYers, the pipe restores proper refrigerant routing in the AC system and is commonly searched by part numbers 9653505980, 6477D8, 9685503280 and 6460WY — include these codes when looking up fitment or replacement options.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 Picasso, Grand C4 Picasso
• Product Codes: 9653505980, 6477D8
• Additional Numbers: 9685503280, 6460WY

Function

The climate pipe routes refrigerant between components of the air conditioning system (for example condenser, evaporator, receiver/drier or compressor) and ensures reliable high/low pressure flow. Constructed to withstand system pressures and temperature cycles, the pipe uses dedicated fittings and sealing O-rings to maintain a leak-free connection.

Fitment And Application

Designed for Citroën C4 Picasso and Grand C4 Picasso vehicles with the 2.0 HDi engine (engine code RHR). Use the listed product codes when matching parts: many technicians and parts systems identify this item primarily by its OEM numbers.

Replacement Procedure

1. Work Only With Recovered Refrigerant: Recover refrigerant into an approved recovery machine before any disassembly.
2. Access And Inspect: Remove any engine covers or components that obstruct access to the pipe and inspect surrounding hoses and connections for wear.
3. Disconnect Fittings: Loosen and remove the pipe fittings. Expect O-rings at each connection — these should be replaced whenever the joint is opened.
4. Install New Pipe: Fit the new pipe using new O-rings and correct lubricant (PAG oil type per manufacturer). Ensure proper seating of fittings.
5. Vacuum And Recharge: Evacuate the system to remove moisture and then recharge with the correct refrigerant type and oil quantity per manufacturer specification.
6. Leak And Function Test: Pressurize, check for leaks (electronic leak detector or UV dye), then run the AC system to verify cooling performance.

Installation Recommendations

• Always Replace O-Rings: Use new O-rings of the correct size and material and lubricate them with the specified refrigerant oil before assembly.
• Use Proper Equipment: Refrigerant recovery, vacuum pump and charging equipment are required for a compliant and safe job.
• Follow Manufacturer Torque And Procedures: Tighten fittings to the vehicle maker’s specifications and observe recommended assembly sequences.
• Inspect Related Components: Replace damaged hoses, worn clamps or a saturated receiver/drier to avoid repeat failures.
• Safety First: Wear eye protection and gloves; avoid releasing refrigerant to atmosphere and follow local environmental regulations.

Why The Part Most Often Fails

Common failure causes include corrosion or pitting of metal lines, degradation of O-rings and seals, mechanical damage from road debris or improper routing, and fatigue from vibration and thermal cycling. Small leaks often start at fittings or damaged sections and, if left unchecked, lead to loss of refrigerant and reduced cooling performance.

Ordering Tip: Search by the OEM numbers 9653505980, 6477D8, 9685503280 or 6460WY to quickly find the correct replacement for Citroën C4 Picasso and Grand C4 Picasso 2.0 HDi (RHR) applications.

This air conditioning pipe is an OE-related replacement designed for Citroën and Peugeot models fitted with the 1.6 HDi (9HR) engine. Ideal for professional workshops and experienced DIY mechanics, the pipe restores sealed refrigerant flow in the A/C circuit and helps recover original cooling performance. Commonly searched by OEM numbers 9675201080 and 6477AA, this part is a direct-fit solution for vehicles that require a serviceable high‑pressure refrigerant line between A/C components.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4 II; Peugeot 308; DS4
• Product Codes: 9675201080; 6477AA
• Other Numbers: No Additional Numbers Available

Function And Fitment

The pipe transports refrigerant under pressure between A/C system components (condenser, dryer/accumulator and evaporator) and ensures leak‑free connection points. It is intended as a direct replacement for the listed Citroën/Peugeot applications with the 1.6 HDi (9HR) engine and is typically fitted where original hard lines or hose assemblies have failed or been damaged.

How The Part Is Replaced

• Recover Refrigerant Using Approved Recovery Equipment Before Any Work.
• Remove Any Securing Clips Or Brackets And Disconnect The A/C Fittings At Both Ends Of The Pipe.
• Replace All O‑Rings/Seals With New, Correctly Lubricated Items During Reassembly.
• Refit The Pipe, Tighten Fittings To Manufacturer Torque Specifications, And Secure Brackets.
• Perform A Vacuum And Leak Test, Then Recharge The System With The Correct Refrigerant And Oil Volume.

Installation Recommendations

• Work Should Be Performed By Or In Cooperation With A Technician Equipped For A/C Service—Refrigerant Recovery And Recharge Require Certified Equipment.
• Always Use New O‑Rings And Apply Appropriate Refrigerant Oil To Seals To Prevent Leaks.
• Inspect Condenser, Receiver/Drier And Compressor For Contamination; If Metal Debris Is Present, Flush The System And Replace The Receiver/Drier.
• Follow Manufacturer Procedures For Tightening And Leak Testing To Avoid Damaging Fittings.
• After Installation, Verify System Pressure And Cooling Performance Under Load.

Why This Part Most Often Fails

Failures Are Usually Caused By Age‑Related Degradation, Corrosion (Especially In Regions With Road Salt), Mechanical Damage From Road Debris Or Improperly Secured Lines, And Deterioration Of O‑Rings/Seals. Compressor Failure Or Internal Contamination Can Also Cause Blockages Or Abrasive Wear Leading To Leaks. Typical Symptoms Include Reduced Cooling Output, Visible Oil Traces Around Connections, And Audible Hissing From Leaks.

Because this part is often searched by its OEM numbers, check the Product Codes 9675201080 and 6477AA when locating the correct replacement. For best results, follow recommended installation steps and carry out a full system leak test and recharge after fitting.

This air conditioning pipe is a direct-fit replacement commonly referenced under OEM numbers such as 9685502680 and related cross-codes 6460LZ / 6460XP / 6477D4. Designed for vehicles in the Stellantis family, the part restores the integrity of the AC refrigerant circuit and helps recover full cooling performance. Ideal for professional garages and experienced DIY mechanics who search by product code or vehicle model.

Description And Function

The pipe is part of the vehicle air conditioning circuit and provides a sealed route for refrigerant between system components. Depending on vehicle configuration it can connect elements such as the compressor, condenser, receiver/drier and evaporator. Proper sealing with O-rings and correct routing ensure efficient cooling and prevent refrigerant loss.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C4; Citroën C4 Picasso; Peugeot 307; Peugeot 3008 I
• Product Codes: 9685502680
• Additional Numbers: 6460LZ, 6460XP, 6477D4

Compatibility

Fits versions with the 1.6 HDi diesel engine as listed above. Always confirm the code printed on the existing pipe against the listed numbers for fastest identification: 9685502680, 6460LZ, 6460XP, 6477D4.

Replacement Procedure

• Recover Refrigerant: Remove refrigerant from the system using certified recovery equipment in accordance with local regulations.
• Access The Pipe: Gain access via the engine bay and, if required, remove obstructing components (airbox, engine covers, undertrays) to reach both pipe ends and mounting brackets.
• Disconnect Connections: Carefully unbolt or release quick-connect fittings and remove the old pipe. Keep track of clamps and brackets.
• Replace Seals: Always fit new O-rings/seals at connection points and lubricate them with the correct type of PAG oil approved for the system.
• Install And Torque: Install the new pipe, secure brackets, and tighten fasteners to the manufacturer’s torque specifications.
• Pressure Test And Evacuate: Perform a leak and pressure test, evacuate the system to remove moisture, then recharge with the correct type and quantity of refrigerant and lubricant.
• Function Check: Run the air conditioning system and verify correct pressure readings and cooling performance. Check for leaks after the system reaches operating temperature.

Installation Recommendation

Replacement of AC pipes requires special tools (refrigerant recovery station, vacuum pump, leak detector, torque wrench). For reliable results use new O-rings, replace the receiver/drier if contamination is suspected, and follow PSA service data for tightening and refrigerant quantities. If you are not equipped to recover and recharge refrigerant legally and safely, have the final steps performed by a professional workshop.

Why The Part Fails Most Often

• Corrosion: Exposure to road salt and moisture can corrode metal pipes and fittings over time, causing leaks.
• Mechanical Damage: Impact from road debris or improper handling during repairs can dent or crack the pipe.
• Seal Deterioration: O-rings and seals harden with age or after exposure to incorrect lubricants and can leak.
• Contamination: Debris or moisture in the AC system can accelerate wear and block passages, stressing components.
• Vibration And Fatigue: Repeated vibration and movement can loosen fittings or cause stress fractures at bends and joints.

Replacing the pipe at the first sign of refrigerant loss or visible damage prevents damage to the compressor and maintains cabin comfort. Using the correct OEM or equivalent code (e.g. 9685502680, 6460LZ, 6460XP, 6477D4) ensures fitment and function for Citroën C4 / C4 Picasso and Peugeot 307 / 3008 I 1.6 HDi models.

This air conditioning pipe is a direct-fit replacement designed for Stellantis petrol/diesel platforms with the 1.6 HDi powerplant. It restores reliable refrigerant flow in the A/C circuit, eliminating common leak points and helping the climate system reach its specified cooling performance. The part is often searched by OEM numbers and cross-references, including 9681723880, 6460LZ, 9650200980, 6460XP, 9656859180 and 6477D4 — useful keywords for technicians and DIY enthusiasts looking for a fast, correct fit.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C4; Citroën C4 Picasso; Peugeot 307; Peugeot 3008 (I)
• Product Codes: 9681723880; 6460LZ; 9650200980; 6460XP; 9656859180; 6477D4
• Additional Numbers: 6460LZ; 9681723880

Installation Recommendations

• Recover Refrigerant With A Certified Recovery Station Before Opening The System. Handling Refrigerant Requires Professional Equipment And Compliance With Local Regulations.
• Replace All O-Rings And Seals At The Connections. Use Correct Size O-Rings Made From The Specified Material And Lubricate Them With The Correct PAG Oil Prior To Assembly.
• Inspect And Replace Any Damaged Clamps, Brackets Or Mounting Hardware To Ensure Proper Routing And Prevent Rubbing Against Chassis Components.
• Evacuate The System With A Vacuum Pump And Perform A Leak Test Using Nitrogen Or An Electronic Leak Detector Before Charging.
• Recharge The System With The Manufacturer-Specified Refrigerant And Oil Quantity (Commonly R134a For These Generations) And Verify Cooling Performance Under Load.
• Use Appropriate Personal Protective Equipment And Follow The Vehicle Manufacturer Repair Manual For Sequence And Torque Values.

Most Common Failure Causes

• Corrosion From Road Salt And Moisture Causing Pinholes Or Perforation.
• Mechanical Damage From Road Debris, Impact, Or Incorrect Routing That Causes Chafing.
• Aging And Hardening Of O-Rings Leading To Loss Of Seal And Refrigerant Leaks.
• Contamination From Compressor Failure Or Debris Causing Local Blockages And Increased Pressure.
• Improper Installation Or Reuse Of Old Seals Resulting In Persistent Leaks.

Why Choose This Part

Direct-fit design with common OEM cross-references makes this pipe a practical choice for workshops and skilled DIYers who need a reliable repair that restores original routing and connection geometry. Supplying correct product codes in searches significantly increases the chance to find the exact replacement quickly.

High-quality replacement climate pipe designed for Citroën and Peugeot models with the 1.6 HDi diesel engine. This service part restores proper refrigerant flow inside the air conditioning circuit, helping to recover full cooling performance and eliminate leaks. Ideal for professional workshops and experienced DIY mechanics who look up parts by reference number — listed OE and alternative codes are included below for fast identification.

Function And Application

The climate pipe is a rigid/soft line in the vehicle air conditioning system that routes refrigerant between components (such as the evaporator, expansion valve, accumulator/drier or condenser depending on system layout). It ensures sealed transport of refrigerant and maintains correct pressure and temperature conditions inside the A/C circuit. A damaged or leaking pipe causes pressure loss, reduced cooling efficiency and may lead to compressor damage if contaminants enter the system.

Compatibility And Fitment

• Citroën C4
• Citroën C4 Picasso
• Peugeot 307
• Peugeot 3008 (first generation)
• Designed for vehicles equipped with 1.6 HDi engines

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C4; Citroën C4 Picasso; Peugeot 307; Peugeot 3008 I
• Product Codes: 9650200980, 6460LZ, 6460XP, 9656859180, 6477D4
• Other Numbers: 9656859180, 6477D4

Replacement Procedure (Overview)

Only qualified personnel with the correct tools should perform A/C repairs. Typical replacement steps:

• Recover refrigerant from the system using certified recovery equipment.
• Remove clamps and connections securing the old pipe; keep track of sealing rings (O-rings).
• Fit the new pipe into position, replacing all O-rings with new ones sized for the joints and lubricated with refrigerant-compatible lubricant.
• Reassemble fittings to the manufacturer recommended torque where available.
• Evacuate the system with a vacuum pump to remove moisture and air, then recharge with the correct type and amount of refrigerant.
• Perform leak test and functional check of the A/C system (pressure test and cooling performance verification).

Installation Recommendations

Follow industry best practices and legal requirements for handling refrigerants. Always use certified refrigerant recovery/recharge equipment. Replace associated O-rings and seals when installing a new pipe to ensure leak-free joints. After fitting, vacuum the system to remove moisture and refill with the manufacturer-specified refrigerant and lubricant. If the vehicle has experienced compressor failure, flush the system to remove debris before installing the new pipe.

Most Common Failure Causes

• Corrosion, especially in regions with road salt exposure, leads to perforation and leaks.
• Mechanical damage from impacts, stone chips or improper previous repairs.
• Deterioration of O-rings and sealing surfaces causing slow leaks over time.
• Contamination after internal compressor failure (metal particles clogging lines and connections).
• Vibration and chafing where the pipe contacts other components, eventually wearing through the material.

Why Choose This Part

Replace a leaking or damaged climate pipe with the correct OEM-referenced unit to restore A/C performance and avoid repeated repairs. The included reference numbers make cross-referencing quick for mechanics searching by part code.

Note For Professionals

This product listing contains OE and alternative references to help with identification. Always confirm fitment against the vehicle’s model and engine variant before ordering. Perform A/C system evacuation and recharge according to local regulations and manufacturer procedures.