This used air filter box lid is designed for 1.4 VTI and 1.6 VTI petrol engines in a range of Peugeot and Citroën models. It secures the air filter element, maintains correct air flow to the intake tract and prevents unfiltered air from entering the engine. Replacement of the lid is a common repair when clips, seals or the plastic housing become damaged by age, heat or impact. The unit is referenced under part numbers V753482480 and 1420T5, which customers and workshops often use when searching for a matching spare.

Technical Information

• Manufacturer: Stellantis (Citroën/Peugeot)
• Model: Citroën C4 II, Peugeot 207, Peugeot 308
• Product Codes: V753482480, 1420T5
• Other Numbers: 1420R2 (Complete Air Filter Box)

Installation Recommendations

Follow these practical steps to fit the lid correctly. Intended for professional mechanics and competent DIYers:

• Work On A Cold Engine And Park The Vehicle On A Level Surface.
• Remove Fasteners: Undo clips, screws or clamps securing the lid. Keep all fasteners for re-use unless damaged.
• Inspect Seals And Filter: Check the air filter element, rubber gasket and retention clips. Replace the filter and any damaged seals at the same time.
• Fit The Lid Evenly: Position the lid so the seal sits flush in the housing groove. Reinstall fasteners without over-tightening to avoid cracking the plastic.
• Check Connections: Ensure intake hoses and resonators are correctly reattached and clamps are secure to prevent intake leaks.
• Final Check: Start The Engine And Listen For Whistles Or Sucking Noises That Indicate A Leak.

Why The Part Fails Most Often

• Plastic Fatigue And Cracking From Long-Term Heat Cycles In The Engine Bay.
• Broken Or Missing Retaining Clips Due To Rough Handling During Service.
• Damaged Or Hardened Gasket Allowing Unfiltered Air To Bypass The Filter.
• Impact Damage From Minor Collisions Or Road Debris.
• Incorrect Reinstallation Or Over-Tightening Of Fasteners Leading To Warping Or Fractures.

Practical Advice And Maintenance

The air filter box lid is not a regular wear item but should be inspected whenever the air filter is serviced—typically every 20,000–30,000 km depending on driving conditions. Replace the lid if you find cracks, deformed sealing surfaces or broken attachment points. When replacing the lid, always fit a new air filter element and ensure the sealing gasket is in good condition to preserve engine performance and fuel efficiency.

Search Tips

Many mechanics and DIY customers locate this part by its product codes: V753482480 or 1420T5. If you require the full assembly, search for 1420R2 (complete air filter box).

This replacement filter box (air intake/air filter housing) is designed for a range of Stellantis diesel models with the 2.0 HDi engine. It houses the engine air filter, secures the Mass Air Flow (MAF) sensor and intake ducts, and ensures clean, metered air reaches the engine for optimal combustion. Supplied to fit original equipment part numbers, this unit is a direct-fit solution for mechanics and experienced DIY enthusiasts who need a reliable, OEM-compatible airbox.

Features And Benefits

– Direct fit for specified Citroën and Peugeot models — reduces installation time compared with universal solutions.
– Maintains correct air routing and MAF sensor positioning to avoid air leaks and inaccurate sensor readings.
– Helps reduce intake noise and protects the air filter from debris and water ingress.
– Supplied with the referenced OEM numbers to simplify parts lookup and ordering.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Models: Citroën C4 Picasso, Citroën C5 X7, Citroën C8, Peugeot 308, Peugeot 3008 (I), Peugeot RCZ, Peugeot DS5
• Product Codes: 9653388980, 9657982380, 1420Q2
• Other Numbers: 9657982380, 1420Q2
• Engine: Primarily 2.0 HDi diesel applications (confirm with part numbers for specific sub‑variants)

Installation Recommendations

• Work With The Engine Cold And Parked On A Level Surface. Remove Intake Ducts And Clamps Securing The Airbox.
• Disconnect The MAF Sensor Electrical Connector Carefully Before Removing The Airbox. Handle The Sensor And Seals Gently To Avoid Damage.
• Unclip Or Unscrew Fasteners Holding The Housing; Remove The Old Box Along With Any Retained Gaskets Or Seals.
• Install The New Filter Box Ensuring All Sealing Surfaces And Gaskets Are Clean And Correctly Seated. Refit The MAF Sensor, Intake Ducts And Clamps, Then Test For Air Leaks.
• Replace The Engine Air Filter When Replacing The Housing; Inspect Hoses And Clamps For Wear And Replace As Needed.

Why This Part Fails Most Often

Airbox housings are generally durable but commonly fail due to plastic fatigue, heat aging and mechanical stress from repeated engine bay temperature cycles. Common causes include cracking at clip points or mounting bosses, damage from impact (e.g., road debris), deterioration of seals that lead to unmetered air leaks, and oil contamination causing softening of plastic. Symptoms of a failing airbox include rattling or whistling noises from the intake, poor idle quality, reduced engine performance, and diagnostic trouble codes related to air flow or mixture when the MAF reads inconsistent values.

Practical Tips For Mechanics And DIYers

• Always Fit New Seals Or Gaskets If The Old Ones Show Any Deformation — A Small Air Leak Can Trigger A Fault Code.
• Check The MAF Sensor For Contamination; Clean Or Replace If Readings Are Erratic After Installing The New Box.
• Keep The OEM Part Numbers (9653388980 / 9657982380 / 1420Q2) Handy When Ordering Related Components Like Clamps, Hoses Or Replacement Filters.
• Inspect Adjacent Components (Intake Ducts, Turbo Inlet, Vacuum Hoses) While The Airbox Is Removed To Avoid Rework.

Compatibility And Ordering

This filter box is intended to match the listed OE part numbers and fit the models and engine family specified above. Use the product codes in the Technical Information section to confirm fitment against your vehicle’s parts documentation or service manuals before ordering.

Product Overview

This intake air resonator is an OEM-style component manufactured for Stellantis Citroën and Peugeot platforms. Designed to fit a range of 1.8i, 2.0i and 2.2i petrol engines (including applications such as the Peugeot 407), the resonator smooths airflow, reduces intake noise and helps maintain consistent air delivery to the engine. Commonly searched under part numbers 9646767780 and 1427J9, this unit is a direct-replacement item aimed at professional workshops and DIY mechanics who require a reliable, vehicle-specific intake component.

Benefits

• Reduces induction noise and unpleasant resonance during throttle changes.
• Stabilizes airflow to the throttle body and mass air flow (MAF) sensor for smoother idling and throttle response.
• OEM-fit design ensures correct mounting points and sealing to the airbox and intake ducting.
• Direct-fit replacement using original part numbers improves compatibility and reduces installation time.

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën and Peugeot vehicles with 1.8i, 2.0i and 2.2i petrol engines (e.g. Peugeot 407)
• Product Codes: 9646767780, 1427J9
• Other Numbers: NFP

Installation Recommendations

Recommended for fitment by experienced technicians or competent DIYers. Typical replacement procedure:

• Park vehicle on level ground and allow the engine to cool.
• Remove the engine cover (if fitted) and/or loose intake trim to access the airbox and resonator.
• Loosen hose clamps and remove any retaining clips or screws holding the resonator to the airbox and intake duct.
• Carefully withdraw the resonator from the intake assembly, checking surrounding hoses and connectors for wear.
• Fit the new resonator in the correct orientation, replace seals or clamps as needed and tighten fasteners to the original torque where specified.
• Reinstall any removed covers and perform a visual check for leaks. Start the engine and listen for changes in intake noise and idle quality.

Tip: Inspect the MAF sensor, intake boots and clamps while the resonator is removed. Replace damaged hoses or loose clamps to ensure a long-lasting repair.

Most Common Failure Causes

• Material fatigue and cracking due to heat cycles and engine bay vibration—plastic resonators can develop splits that cause vacuum leaks and increased intake noise.
• Oil contamination from PCV system or turbocharger blow-by (on applicable engines) leading to softening or deforming of the resonator and seals.
• Loose or broken mounting points and degraded rubber seals resulting in air leaks and poor sealing to the airbox.
• Age-related deterioration of internal baffles which can increase intake noise and affect airflow characteristics.

Maintenance And Service Life

There is no fixed interval for replacement. Inspect the resonator during routine service (air filter replacement or when diagnosing intake leaks). Typical signs that indicate replacement is required include audible hissing or sucking noise from the intake, rough idle, or visible cracks/deformation on the resonator body.

Compatibility And Part Numbers

When ordering, reference the product codes listed above (9646767780, 1427J9) to improve the chance of correct fitment. The resonator is intended as a direct replacement for matching Citroën and Peugeot 1.8i / 2.0i / 2.2i engine applications, including models such as the Peugeot 407 where these part numbers apply.

Who Should Fit This Part

Suitable for professional auto technicians and experienced DIY mechanics comfortable working in the engine bay. If you are unsure about removal steps or encounter electronic sensors while accessing the resonator, consult a workshop manual or a qualified technician.

This used intake resonator connection is a direct-fit part for Citroën and Peugeot 2.0i petrol engines. Commonly searched by product numbers 9626612880 and 14265E, it links the air resonator to the intake system, helps dampen induction noise and ensures correct airflow to the throttle body. Ideal for professional mechanics and DIY enthusiasts who need a reliable replacement part that restores airtightness and engine response in the low and mid rpm range.

Technical Information

Manufacturer: Stellantis / Citroën / Peugeot

Model: Citroën C5, Peugeot 407 (2.0i)

Product Codes: 9626612880, 14265E

Other Numbers: NFP

Function

The connector joins the intake resonator to the air intake tract. It reduces induction noise, cushions airflow pulsations and helps maintain steady pressure and flow to the throttle body. A sealed, correctly fitted connector prevents unmetered air entering the intake, which can otherwise cause rough idling or drivability issues.

Fitment And Replacement

Fitment is typically straightforward for technicians familiar with PSA engine bays. Access the resonator and intake snorkel by removing the engine cover and any obstructing trim. Loosen hose clamps or remove retaining clips, slide off the old connector and inspect adjoining ducts for damage. Fit the new connector, ensuring a snug fit on both mating parts and re-tighten clamps to secure an airtight seal. After installation, start the engine and check for vacuum leaks or abnormal induction noise.

Installation Recommendations

– Work on a cool engine and keep the intake area clean to avoid debris entering the system.
– Use appropriate stainless or OEM-style hose clamps and avoid overtightening which can deform the connector.
– Inspect adjacent components (airbox seals, MAF sensor boot, resonator housing) for wear when replacing the connector.
– After assembly, verify idle stability and perform a visual leak test (soapy water or smoke) if available.

Why This Part Fails Most Often

Failures are usually caused by age-related material fatigue, heat cycles, and mechanical vibration. Exposure to engine bay heat, oil contamination from crankcase ventilation systems, or impact from road debris can lead to cracks, hardening or deformation of the connector. Once the seal is compromised, symptoms include increased induction noise, erratic idle, loss of low-end torque or error codes related to airflow inconsistencies.

How Often It Fails

There is no fixed replacement interval; the connector often lasts many years but should be inspected during routine service or when symptoms appear. Vehicles exposed to frequent short trips, high underbonnet temperatures or oil blow-by may require earlier replacement.

Note On Search And Identification

This part is frequently searched by its product numbers (9626612880, 14265E). Use these reference numbers when checking fitment for Citroën C5 and Peugeot 407 2.0i applications to speed up identification.

Description

This intake resonator connector is a direct-fit component designed for Citroën and Peugeot vehicles equipped with the 2.0i petrol engine. It links the air resonator (intake silencer) to the air intake tract, helping to smooth airflow, reduce intake noise and maintain consistent engine response. Ideal for professional workshops and DIY mechanics searching by OE numbers (9641733880, 143431), this part restores proper sealing and resonance characteristics after damage or wear.

Benefits

• Restores correct intake tract sealing to prevent unmetered air leaks that affect idle and performance.
• Reduces intake noise and resonance for a quieter engine bay.
• OE-compatible fit that simplifies replacement and reduces installation time.
• Valuable for mechanics and car owners who search by part numbers (9641733880 / 143431).

Technical Information

• Manufacturer: Stellantis / Citroën / Peugeot
• Model: Citroën C5; Peugeot 407 (vehicles with 2.0i engine)
• Product Codes: 9641733880, 143431
• Additional Numbers: OE Equivalent Numbers 9641733880 | Internal Tag 143431

Installation Recommendations

Replacement is straightforward for a trained technician or an experienced DIYer. Follow these practical steps:

• Work on a cool engine and ensure the intake system is depressurized.
• Remove the air intake hose clamps and detach the airbox or resonator as needed to access the connector.
• Inspect mating surfaces, gaskets and adjacent hoses for wear or oil contamination; clean before fitting the new connector.
• Replace or tighten hose clamps to the manufacturer’s recommended tension to avoid leaks; use quality clamps to prevent failure.
• After installation, check for intake leaks at idle and under load; listen for abnormal intake noise and verify stable idle.

Why This Part Fails

Common causes of failure include long-term heat and UV exposure that makes the plastic brittle, oil contamination from crankcase ventilation that weakens the material, mechanical damage during previous repairs, and clamp fatigue or improper installation allowing air leaks. Failure typically presents as hissing or fluctuating idle, reduced throttle response or a noisy intake.

Notes For Buyers

• Searchable by OE numbers 9641733880 and 143431 — include these in your search to find the correct replacement quickly.
• Inspect surrounding intake components (hoses, clamps, resonator box) when replacing this connector to prevent repeat failure.
• Designed for vehicles equipped with the 2.0i engine; verify engine type before ordering.

High-quality replacement air intake filter box designed for Citroën and Peugeot 1.6 e-HDI engines. This OE-fit part (references 9673061080 / 1420V1) houses the air filter element, secures intake connections and helps maintain correct airflow and filtration for turbocharged diesel engines. Built to the factory fitment specifications, the unit restores proper sealing at hose connections and the mass air flow sensor flange to prevent unmetered air and ensure accurate engine management. Ideal for professional workshops and experienced DIY technicians looking for a direct-fit solution that simplifies maintenance and reduces intake leaks.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: 1.6 e-HDI
• Product Codes: 9673061080, 1420V1
• Other Numbers: OEM Reference Numbers As Above

Compatibility

• Citroën Berlingo B9
• Citroën C3 Picasso
• Citroën C4 II
• Citroën C4 Picasso
• DS4
• Peugeot 3008 I
• Peugeot 308
• Peugeot 5008 I
• Peugeot Partner Tepee

Function And Common Failure Causes

The filter box secures the air filter element and directs filtered air to the turbocharger and intake tract while providing a mounting point for the Mass Air Flow (MAF) sensor or air temperature sensors. Common issues include cracked plastic housing or broken mounting tabs from age and vibration, damaged sealing lips causing unmetered air ingress, and internal contamination by oil or water leading to sensor errors. A damaged or leaking filter box can cause rough idling, poor fuel economy, increased emissions and MAF-related fault codes.

Installation Recommendations

• Work On A Cold Engine: Ensure The Engine Is Off And Cool Before Starting.
• Disconnect Electrical Connectors Carefully: Gently Release The MAF Or Sensor Connector To Avoid Damage.
• Release Hose Clamps And Fasteners: Remove Intake Hoses, Clips Or Screws Securing The Box; Keep Track Of Fasteners For Reassembly.
• Replace Seals And Clamps Where Necessary: Always Fit New Hose Clamps Or Sealing Gaskets If The Old Ones Are Worn.
• Inspect Related Components: Check The Air Filter Element, MAF Sensor And Intake Hoses For Damage Or Contamination And Replace If Needed.
• Perform A Seal And Leak Check After Installation: Start The Engine And Inspect For Vacuum Leaks Or Unusual Noises.

Recommended Maintenance Interval

Inspect The Airbox And Filter Element At Regular Service Intervals. Replace The Air Filter According To The Manufacturer’S Schedule; Typical Intervals Range From 20,000 To 40,000 Km Depending On Driving Conditions. Replace The Filter Box If Cracks, Broken Mounts Or Degraded Seals Are Found.

Why This Part Fails Most Often

Failures Are Usually Caused By Ageing Plastic (Brittleness From Heat Cycles), Mechanical Impact (Road Debris Or Improper Handling), Deteriorated Seals Allowing Unfiltered Air Ingress, Or Contamination From Engine Oil/Water. Broken Mounting Tabs Are A Frequent Cause After Many Years Or Following Rough Service Removal.

Why Choose This Unit

This filter box Provides A Direct-Fit Replacement To Restore Proper Intake Sealing And Sensor Mounting Geometry. It Helps Avoid Air Leaks That Lead To Engine Management Faults And Restores Correct Airflow For Reliable Performance. Suitable For Professional Fitters And Skilled DIY Enthusiasts Seeking A Straightforward, OEM-Referenced Replacement.

This replacement filter box (airbox) fits the 1.6 HDi 80 kW (engine code 9HZ) family used in Citroën C5 II (X7) and Peugeot 407 models. It houses the engine air filter and ensures clean, metered airflow to the engine management system and turbocharger. The part is often searched and identified by OE numbers, making it easy for professional mechanics and DIY enthusiasts to find the correct unit for service or repair.

Designed to restore proper intake sealing and reduce unwanted air leaks, this airbox helps maintain engine performance, fuel efficiency and reliable operation of the mass air flow (MAF) sensor. Replacing a damaged or cracked airbox eliminates unfiltered air ingestion and prevents related issues such as poor idling, reduced power and false air readings.

Technical Information

• Manufacturer: Stellantis (Citroën, Peugeot)
• Model: Citroën C5 II (X7); Peugeot 407 — Engine 1.6 HDi 80 kW (9HZ)
• Product Codes: 9685205580, 9651883080, 1420N9
• Other Numbers: 9648938580

Installation Recommendations

1. Park on a level surface, engage the parking brake and isolate the ignition.
2. Disconnect the negative battery terminal if you will be handling electrical connectors (recommended when removing the MAF sensor).
3. Remove the intake ducting and any sound deadening resonator attached to the airbox. Loosen hose clamps and unclip retaining fasteners.
4. If equipped, carefully unplug the MAF sensor connector and remove the sensor from the airbox housing to avoid damage. Keep screws and seals clean and reuse if undamaged.
5. Unscrew or unclip the airbox mounting points and extract the old housing. Inspect mounting rubbers, hoses and clamps; replace any brittle or damaged items.
6. Install the new airbox, refit the MAF sensor and reconnect electrical connectors, ensuring a proper seal. Reconnect intake ducts and tighten clamps securely but do not overtighten plastic fixings.
7. Fit a new air filter element at the same time for best performance and to prevent immediate contamination of the new housing.
8. Perform a visual leak check and start the engine to verify normal idling and absence of intake leaks or abnormal noises.

Why The Part Fails Most Often

• Plastic Fatigue And Heat Cycling: Long-term exposure to engine bay heat and vibration causes cracks or warped sealing surfaces.
• Impact Or Poor Handling: Damage during repairs or from road debris can break mounting tabs or create cracks.
• Clogged Or Saturated Filter Element: A neglected air filter can become saturated with dirt or oil, leading to excessive pressure differentials and stress on the housing.
• Oil Contamination Or Turbo Leaks: Oil ingress from turbocharger or PCV systems can degrade plastic and seals over time.

Maintenance And Signs Of Failure

Inspect the airbox each time you replace the air filter (typical service interval ~20,000 km under normal conditions, sooner in dusty environments). Replace the airbox if you find visible cracks, damaged mounting tabs, a compromised seal around the filter element or evidence of oil/water ingress. Common symptoms of a failing airbox include rough idle, reduced power, increased fuel consumption and inconsistent MAF readings.

Because technicians and DIY mechanics frequently look up parts by OE numbers, the listed product codes make it straightforward to confirm fitment and order the correct replacement for Citroën C5 II (X7) and Peugeot 407 1.6 HDi 80 kW (9HZ) models.

This filter box is designed for the 1.6 HDi 80 kW diesel engines used in Citroën C5 II (X7) and Peugeot 407. Ideal for mechanics and DIY enthusiasts who search by OE numbers, this replacement part restores correct air routing and protects the engine by housing the air filter element. The robust construction ensures secure mounting and reliable sealing to prevent unfiltered air ingress, which can cause performance loss and increased wear. Featuring compatible product codes listed below, the unit is a direct-fit part for affected models and simplifies workshop replacement with common tools.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C5 II (X7); Peugeot 407
• Product Codes: 9659405080; 9651883080; 1420N9
• Additional Numbers: 1.6 HDi, 80 kW

Function And Benefits

The filter box houses the engine air filter and channels intake air to the turbocharger and engine. A properly sealed filter box prevents contamination from dust, moisture and debris, helping to maintain fuel economy, throttle response and turbocharger longevity. Replacing a damaged filter box restores correct air metering and prevents unfiltered air from bypassing the filter element.

Typical Replacement Interval And Symptoms

Filter boxes do not have a fixed service interval and usually last the life of the vehicle unless damaged. Replace the unit if you notice visible cracks, broken mounting tabs, persistent check-engine lights related to intake or mass-air readings, unusual whistling from the intake, or if the airbox no longer seals properly. Addressing a faulty filter box promptly prevents accelerated wear of the air filter and downstream components.

Installation Recommendations

• Prepare basic workshop tools: screwdriver set, socket set and new clamps if required.
• Disconnect the battery if you will unclip or disconnect any sensors near the airbox to avoid accidental faults.
• Release clamps and remove intake ducts connected to the airbox; carefully unplug any sensors (e.g., MAF) if present and note their orientation.
• Remove fixing bolts or clips and lift out the old filter box with the air filter element; inspect and replace the filter element if needed.
• Fit the new filter box, ensuring all sealing surfaces and gaskets are clean and correctly seated; tighten clamps to proper torque and reconnect sensors and ducts.
• Start the engine and check for intake leaks, unusual noises and that no diagnostic warnings remain.

Why This Part Most Often Fails

• Physical Damage: Impact or improper handling can crack the housing or break mounting tabs during maintenance.
• Age And Heat Cycling: Prolonged exposure to engine heat and vibration can embrittle plastic, leading to hairline cracks and leaks.
• Poor Sealing: Worn or damaged gaskets and loose clamps allow unfiltered air ingress, causing contaminants to bypass the filter element.
• Aftermarket Modifications: Incorrectly fitted intake upgrades or clamps can stress mounting points and accelerate failure.

Pick this filter box when you require a direct-fit replacement for Citroën C5 II (X7) and Peugeot 407 1.6 HDi 80 kW applications. Use the OE product codes 9659405080, 9651883080 or 1420N9 to find the correct listing quickly and ensure compatibility with the targeted engine variant.

This air filter box (airbox) is designed for Citroën C4 and Peugeot 307 models equipped with 2.0i petrol engines. The housing secures the air filter element, directs intake airflow, and protects the intake tract from dirt and water. Mechanics and DIY enthusiasts often search by part numbers 9643567080 or 1427J8 when looking for a direct replacement. A correctly fitted airbox ensures accurate airflow measurement, stable idling and optimal engine performance.

Technical Information

Manufacturer: Stellantis / Citroën / Peugeot
Model: Citroën C4; Peugeot 307 (2.0i engines)
Product Codes: 9643567080
Additional Numbers: 1427J8

Application And Fitment

Fits the intake system of 2.0i petrol variants of Citroën C4 and Peugeot 307. Confirm fitment by matching the part numbers 9643567080 or 1427J8 to the original housing. The airbox is compatible with the standard intake layout where the mass air flow (MAF) sensor or intake duct mounts directly to the housing.

Installation Recommendations

• Tools Required: screwdriver or Torx set, 8–10 mm socket, trim tool or small pry for clips.
• Procedure: Remove clamps and intake hoses, unclip or unscrew the airbox fasteners, gently disconnect any attached MAF sensor or hoses, replace the housing and reinstall clamps ensuring a tight seal. Replace the air filter element at the same time.
• Tips: Inspect and clean sealing surfaces and intake ducts before installation. Refit the MAF sensor carefully and avoid contaminating the sensor element. Ensure all clamps are secure to prevent unmetered air leaks.

Most Common Failure Reasons

Airbox failure is usually caused by physical damage, brittle plastic and worn clips. Common causes include impact damage, prolonged exposure to heat that makes the plastic brittle, degraded rubber seals and improper removal that breaks mounting tabs. Symptoms of a failing airbox include whistling or intake noise, unstable idle, decreased engine power, increased fuel consumption and possible fault codes related to intake airflow. Because the housing protects the air filter, any cracks or poor sealing will allow unfiltered air and contaminants into the intake, which can accelerate wear on downstream components.

Why Choose This Replacement

Choosing a correctly numbered replacement housing (9643567080 / 1427J8) restores the original intake geometry and sealing. For workshops and home mechanics, replacing a damaged airbox is a cost-effective way to eliminate intake leaks and maintain engine performance. Always pair the new housing with a new air filter element and check associated intake components (hoses, clamps, MAF sensor) during the service.

High-quality intake resonator designed to control intake tract acoustics and airflow behavior on Citroën C4 and Peugeot 307 models equipped with the 2.0i 130 kW petrol engine. This component integrates a vacuum-actuated flap that helps optimize intake resonance across different engine loads, reducing unwanted induction noise and contributing to smoother throttle response. Commonly searched by its product codes, the part is a direct-fit solution for mechanics and DIY enthusiasts seeking a reliable replacement for a cracked or malfunctioning resonator assembly.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C4; Peugeot 307
• Product Codes: 9643586380; 9646189680
• Additional Numbers: 143450; 143439; NFP

Function And Benefits

The resonator smooths pressure pulses in the intake tract and reduces intake noise at specific engine speeds. The vacuum flap adjusts the resonator’s internal volume or flow path depending on engine vacuum, improving torque delivery and drivability across the rev range. Replacing a damaged resonator restores proper airflow dynamics, reduces whistling or hissing noises, and helps maintain stable idle and throttle response.

Symptoms Indicating Replacement

• Audible whistling, hissing, or increased intake noise under load or at idle.
• Rough Idle Or Intermittent Hesitation When Accelerating.
• Visible Cracks Or Broken Mounting Tabs On The Resonator Body.
• Vacuum Flap Stuck Or Diaphragm Failure Causing Irregular Airflow.

Installation Recommendations

• Work On A Cool Engine And Disconnect The Battery If Removing Sensors Nearby.
• Remove The Engine Cover And Unclip Or Unscrew The Air Intake Ducting To Access The Resonator.
• Carefully Disconnect Any Vacuum Hoses Connected To The Flap; Note Their Routing For Reassembly.
• Unfasten Clamps Or Screws Securing The Resonator, Remove Old Unit, And Inspect Surrounding Hoses And Seals.
• Fit The Replacement Resonator Ensuring Vacuum Hose Connections Are Secure And Clamps Are Tightened To Manufacturer Torque Where Applicable.
• After Installation, Start The Engine And Check For Air Leaks, Proper Flap Movement, And Normal Idle/Driveability.

Most Common Reasons For Failure

• Age-Related Plastic Degradation And Cracking From Heat Cycling And Engine Bay Vibration.
• Mechanical Damage From Impact Or Improper Removal/Installation.
• Vacuum Diaphragm Or Hose Deterioration Causing The Flap To Stick Or Lose Actuation.
• Oil Contamination Or Debris In The Intake Tract Affecting Flap Movement.

This resonator is frequently searched by its product numbers; verify the listed codes when ordering to ensure you receive the correct direct-fit replacement for Citroën C4 and Peugeot 307 2.0i 130 kW engines.