Premium replacement heat exchanger designed for PSA 2.0 HDi and 2.2 HDi engines. This coolant/air heat exchanger (OEM code 0384H0) is frequently sought by mechanics and DIY enthusiasts servicing Citroën and Peugeot diesel engines. It helps maintain correct operating temperatures by transferring heat between the coolant circuit and the air stream, contributing to engine thermal stability, turbo efficiency and cabin heating performance. Clear OEM reference numbers make it easy to find the exact part for maintenance or repair.

Technical Information

• Manufacturer: Stellantis (Citroën / Peugeot)
• Model: Citroën C5, Citroën C8; Peugeot 406, Peugeot 607, Peugeot 807. Suitable For 2.0 HDi And 2.2 HDi Engines.
• Product Codes: 0384H0
• Other Numbers: NFP (as referenced)

Features And Benefits

Robust construction for long service life under high thermal cycling. Direct fit to original mounting points for straightforward replacement. Improves engine temperature control and helps protect turbocharger and EGR components by maintaining correct coolant flow and heat dissipation. Commonly searched by the OEM code 0384H0, making it quick to locate in catalogs and online stores.

How The Part Works

The unit acts as a compact heat exchanger within the engine cooling circuit: hot coolant transfers heat to the surrounding air (or secondary coolant/air circuit depending on installation), lowering coolant temperature and helping maintain stable engine operating conditions. Proper operation reduces overheating, improves warm-up time and supports correct heater performance in the passenger compartment.

Installation Recommendations

Replacement can be performed by experienced DIYers or professional technicians. Typical installation steps:

• Allow Engine To Cool Completely And Wear Protective Gloves And Eye Protection.
• Drain The Cooling System To A Level Below The Heat Exchanger Connections.
• Disconnect Hoses, Clamps And Any Sensor Wiring Attached To The Unit.
• Unbolt The Heat Exchanger From Its Mounting Brackets And Remove Carefully.
• Fit New Unit, Replace Any O-Rings Or Gaskets, And Reconnect Hoses With New Clamps If Needed.
• Refill Cooling System With Correct Specification Coolant And Bleed Air According To Manufacturer Procedure.
• Start Engine And Check For Leaks, Proper Temperature Rise And Heater Operation.

Use Recommended Coolant Mixture And Observe Manufacturer Torque Values For Fasteners. If You Replace Hoses Or Clamps, Use Quality Components To Avoid Future Leaks.

Why This Part Most Commonly Fails

Common failure causes include corrosion from improper coolant or neglected maintenance, thermal fatigue from repeated heating and cooling cycles, mechanical damage from road debris or impact, and internal blockages due to scale or oil contamination. Symptoms of a failing heat exchanger are external coolant leaks, Engine Overheating, Loss Of Cabin Heating, Visible Corrosion, Or Coolant Contamination.

Practical Tips For Mechanics And DIYers

• When Replacing The Unit, Inspect Surrounding Hoses, Clamps And Sensors; Replacing These Together Reduces Rework.
• Pressure-Test The Cooling System After Installation To Verify Leak-Free Operation.
• Document The OEM Code (0384H0) When Ordering To Ensure Correct Fitment.

This heat exchanger is a direct-fit solution intended for technicians and competent DIYers who service Citroën and Peugeot 2.0 HDi and 2.2 HDi engines. Clear identification by model and product code simplifies sourcing and reduces downtime during repairs.