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.

This air intake filter box (OE 9640454480, 1427J3) is a direct-fit replacement designed for Citroën and Peugeot vehicles equipped with 2.0 and 2.2 HDi diesel engines. Built to restore correct airflow and sealing of the intake tract, the unit is ideal for professional garages and DIY mechanics who search by OE number or model. Replacing a damaged airbox prevents unmetered air leaks, protects the turbocharger and MAF sensor from contamination, and helps maintain engine performance and fuel economy.

Function: The filter box houses the air filter element and directs intake air to the turbocharger and engine while sealing the intake from engine bay contamination. This version is supplied without the water-to-air heat exchanger, matching the configuration used on the listed models and engine variants.

Technical Information

• Manufacturer: Stellantis
• Model: Citroën C5; Citroën C8; Peugeot 607; Peugeot 807
• Product Codes: 9640454480, 1427J3
• Additional Numbers: None Provided

Installation Recommendations

• Tools Required: Common hand tools (screwdrivers, socket set), pliers for hose clamps, and a torque wrench if reusing torque-sensitive fasteners.
• Procedure Summary: Disconnect battery for safety, remove intake hoses and MAF sensor if attached, unclip or unscrew fasteners securing the old airbox, swap the airbox and seals, refit hoses and sensors ensuring airtight connections. Check that all clips and clamps are fully engaged.
• Time Estimate: Approximately 30–60 minutes in a typical workshop environment, shorter for experienced technicians.
• Notes: Inspect the air intake hoses, MAF sensor, and sealing gaskets while installing. Replace any brittle or damaged seals to ensure proper sealing and avoid sensor errors.

Why This Part Fails Most Often

• Cracked Housing: Plastic housings degrade over time due to heat cycles and vibration, leading to cracks and air leaks.
• Broken Clips And Mounts: Impact, rough handling during service, or fatigue can break the attachment points, causing poor sealing or rattles.
• Seal And Gasket Deterioration: Rubber seals harden or tear, allowing unmetered air to bypass the filter and trigger fault codes or rough idling.
• Contamination And Clogging: Excessive dust, oil or coolant ingress (if previous failures occurred) can damage internal components and reduce airflow.
• Previous Repairs: Improper repairs or makeshift fixes often accelerate failure or create secondary issues (loose clamps, misaligned ducts).

Signs that Replacement Is Needed: Visible cracks, audible whistling or suction noises at idle, decreased engine response, or diagnostic codes related to airflow or MAF readings. Because the airbox is not a regular consumable, replacement is typically required only after damage or when seals fail.

Search Tip: Customers frequently locate this part by OE numbers 9640454480 and 1427J3. Verify the part number against the vehicle’s model and engine code before ordering to ensure the correct configuration for 2.0 and 2.2 HDi applications.

One of the critical functions of the filter box is to collect dirt and debris from the air intake, ensuring that only clean air enters the engine. Regular replacement of the filter box can prevent engine wear and improve fuel efficiency, making it an important maintenance task. It’s recommended to check the filter box condition every 30,000 to 40,000 miles or as specified in your vehicle’s maintenance schedule.

Common issues that lead to the filter box needing replacement include clogging from impurities and damage from exposure to extreme operational conditions. Therefore, ensuring your filter box is in good condition is crucial for the longevity and performance of your engine.

Technical Information

• Manufacturer: PSA
• Model: Citroën C5, C8; Peugeot 406, 607, 807
• Product Codes: 9629040380
• Other Numbers: 1427G9

This product is specifically compatible with the following Citroën and Peugeot models: C5, C8, 607, and 807, making it ideal for mechanics and DIY enthusiasts alike. Regular replacement is recommended, as filters can become clogged over time, reducing airflow and potentially leading to engine performance issues.

Technical Information:

• Manufacturer: PSA Citroën Peugeot
• Model: C5, C8, 607, 807
• Product Codes: 9640454480, 964045780
• Other Numbers: 1427J3, 144200

Ensure your vehicle operates at its best with this reliable Filter Box, designed to meet or exceed OEM specifications.

It fits various models including the Citroën Berlingo and Partner, providing a reliable solution for both professional mechanics and DIY enthusiasts. Regular replacement of the filter box is recommended to prevent clogging and to maintain optimal air flow, which can directly affect engine efficiency and fuel consumption.

Key features include compatibility with multiple part numbers: 9643853880, 9643853980, 9647154680, and 1427J6. This product is engineered to meet high standards of quality, ensuring durability and performance under demanding conditions.

Technical Information

• Manufacturer: PSA
• Model: Citroën, Peugeot
• Product Codes: 9643853880, 9643853980
• Additional Numbers: 9647154680, 1427J6