Description
Air Connection At The Intercooler For Citroën/Peugeot 2.0 HDi RH02 Engines
This intercooler air connection (boost/air intake connection) is a direct-fit replacement used on Citroën and Peugeot 2.0 HDi RH02 engines. Designed to restore correct boost delivery between the turbocharger and the intercooler, the part helps eliminate boost leaks that cause reduced performance, poor throttle response and error codes such as P0299 (Turbo Underboost). Commonly searched under part code 0382NF, this component is suitable for workshops and experienced DIY mechanics who expect a reliable fit and quick installation.
Key Benefits
- Direct fit for original routing on 2.0 HDi RH02 engines — no modification required.
- Restores airtight connection between turbocharger and intercooler to recover lost boost and engine response.
- Helps prevent engine fault codes and limp-home modes caused by boost leaks.
- Durable construction suitable for exposure to heat and oil vapors typical in turbocharged diesel applications.
Technical Information
- Manufacturer: Stellantis / Citroën / Peugeot
- Model: Citroën C4 Picasso; Citroën C5 X7; Peugeot 3008 I; Peugeot 5008 I
- Product Codes: 0382NF; 0382.NF
- Other Numbers: P0299
Function And Failure Modes
The air connection links the turbocharger outlet and the intercooler inlet, maintaining the pressurised air path required for correct turbo operation. It also damps pressure pulses and ensures stable airflow to the intercooler. Typical causes of failure include material aging, heat fatigue, oil contamination from turbocharger seals, clamp corrosion and mechanical damage from debris or incorrect installation. Small cracks or loosened clamps quickly lead to loss of boost, resulting in reduced power, increased fuel consumption and diagnostic trouble codes.
When To Replace
Replace the air connection if you observe visible cracks, soft spots, oil saturation, loose or corroded clamps, or if diagnostic trouble codes indicate underboost conditions. Boost leaks can develop gradually; inspect the hose during scheduled services and after any turbo or intercooler work. The service life varies with driving style and engine condition, but exposure to oil and heat accelerates deterioration.
Installation Recommendations
- Perform work with the engine cold and the intake system depressurised.
- Loosen clamps at both ends (turbocharger outlet and intercooler inlet), remove the old connection and inspect mating surfaces for oil or damage.
- Clean the turbo outlet and intercooler inlet thoroughly before fitting the new connection.
- Fit the new hose, ensure correct orientation and routings, then secure with new or serviceable clamps. Use compatible clamp types (ear clamps or worm-drive clamps as per original specification).
- After installation, start the engine and check for boost leaks under load (road test or use a boost gauge). Check for absence of diagnostic codes and confirm normal turbo response.
- Recommended tools: set of screwdrivers or nut drivers, appropriate clamps, basic hand tools and a boost pressure gauge for verification.
Why This Part Usually Fails
Failure is most often caused by long-term exposure to high under-hood temperatures and oil contamination from turbocharger seal wear. Repeated pressure cycling, ageing rubber or silicone material, and corroded clamps contribute to cracks and air leakage. Improper installation or reusing damaged clamps accelerates failure. Detecting early signs (oil deposits, visible cracks, loose clamps) and replacing the connection promptly prevents secondary damage to the turbo and intake system.
Compatibility And Reference
Often listed under reference 0382NF / 0382.NF and associated with the 2.0 HDi RH02 engine family used in Citroën C4 Picasso, Citroën C5 X7, Peugeot 3008 I and Peugeot 5008 I. Search by part code for fast identification.
Notes For Professionals
Ideal for workshops and skilled DIY mechanics. When replacing, inspect the entire intake and intercooler circuit for oil contamination and damaged clamps. If turbo oil seal wear is present, address the root cause to avoid repeated failures.
