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.

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.