This intake air-coolant heat exchanger is designed for PSA group diesel engines and fits Citroën C8 and Peugeot 807 vehicles with 2.0 and 2.2 HDi engines. The unit transfers engine coolant heat to the intake airflow to support cold-start performance and stable idling in cold conditions. It is supplied with the original OE reference numbers to simplify lookup and ordering.

Key Features

• Direct-fit replacement for PSA OE numbers 9640450780, 144200, 144207.
• Improves intake air temperature management during cold starts.
• Designed for workshop use and competent DIY installers; straightforward mounting points and coolant connections.
• Durable construction to withstand engine bay temperatures and coolant exposure.

Fitment And Compatibility

Primarily intended for:

• Citroën C8 & Peugeot 807
• Engines: 2.0 HDi and 2.2 HDi (PSA diesel platforms)

Always verify fitment using the OE/product codes 9640450780, 144200, 144207 before purchase to ensure compatibility with the exact vehicle VIN and engine variant.

Typical Failure Modes & Symptoms

• Coolant leaks at hose connections or internal cracking leading to low coolant level warnings.
• Soot and debris buildup causing reduced heat transfer and poorer cold-start behaviour.
• Corrosion or galvanic damage where coolant and air interfaces occur.
• Visible coolant traces around intake ducts or inesperable loss of coolant without obvious external leaks.

Replacement And Installation Notes

Recommended for experienced mechanics or competent DIYers. Typical replacement steps include:

• Drain or partially lower the coolant level to avoid spillage when disconnecting the unit.
• Remove any intake hoses or ducting that obstruct access to the heat exchanger.
• Disconnect coolant hoses and be prepared to catch residual coolant; replace any worn clamps or seals.
• Unbolt the heat exchanger from its mounting points, transfer any required brackets or sensors, and fit the new unit with new seals where applicable.
• Refit hoses and ducting, refill and bleed the cooling system to remove air pockets, then check for leaks and correct operation.

Use correct coolant type recommended by the vehicle manufacturer and verify torque settings for clamps and bolts. If uncertain, consult a workshop manual for the specific vehicle year and engine code.

Maintenance Tips

• Inspect coolant hoses and clamps during every service; replace brittle or corroded parts to prevent future leaks.
• Keep intake pathways free of oil and soot; regular service of the EGR and intake system reduces contamination of the heat exchanger.
• Monitor coolant condition and change at recommended intervals to limit corrosion and deposits.

Technical Information

• Manufacturer: PSA Citroën Peugeot
• Model: Citroën C8, Peugeot 807 – Engines 2.0 HDi, 2.2 HDi
• Product Codes: 9640450780, 144200, 144207
• Other Numbers: 9640450780, 144200, 144207

If you need help confirming compatibility with a specific vehicle or VIN, contact your parts specialist with the OE numbers above to avoid incorrect ordering.

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.