Description
Exhaust gas recirculation (EGR) pipe for Citroën and Peugeot 2.0 HDi RHR engines.
This EGR pipe is a direct-fit replacement designed for diesel 2.0 HDi RHR engines used across several Citroën and Peugeot models. It routes recirculated exhaust gases from the EGR valve/cooler back into the intake tract to reduce NOx emissions and lower combustion temperatures. The part is commonly searched and identified by manufacturer codes 9652264880 and 161836, so listing these numbers in searches increases the chance of finding the correct item quickly.
Technical Information
- Manufacturer: Citroën / Peugeot (Stellantis)
- Model: Citroën C5, Citroën C5 X7, Citroën C8, Peugeot 307, Peugeot 407, Peugeot 807 — Engine: 2.0 HDi (RHR)
- Product Codes: 9652264880, 161836
- Other Numbers: RHR (Engine Code)
Function And Application
The EGR pipe conveys exhaust gases from the EGR valve or EGR cooler back into the intake manifold or turbo inlet, allowing a controlled portion of exhaust gases to be reintroduced into the combustion chamber. This reduces peak combustion temperatures and NOx formation. On the 2.0 HDi RHR engines the pipe must withstand high temperatures and soot-laden gases, so secure sealing and correct routing are essential for reliable operation.
Typical Symptoms Of A Faulty EGR Pipe
- Illuminated Check Engine Light (often with P040x codes related to EGR flow)
- Rough idle, hesitation or loss of power under load
- Increased smoke or diesel odor from the exhaust
- Visible soot or oil leaks around pipe connections
Common Failure Causes
Failures are usually related to carbon build-up, thermal stress and corrosion. Over time soot and oil residues accumulate inside the EGR system, restricting flow and increasing internal pressure. Thermal cycles and vibration can lead to cracks, fractured flanges or failed seals. Gaskets, clamps and sealing surfaces also deteriorate, causing exhaust leaks that trigger warning lights and performance issues. These problems typically appear at high mileage, especially on vehicles with frequent short trips or heavy soot generation.
Replacement And Installation Recommendations
- Work Safely: Allow Engine To Cool Before Starting And Wear Appropriate PPE.
- Preparation: Disconnect The Battery If Accessing Nearby Sensors. Remove Any Intake Or Turbo Piping That Blocks Access To The EGR Pipe.
- Removal: Loosen Clamps And Fasteners, Then Detach The EGR Pipe Carefully To Avoid Damaging Adjacent Hoses, Sensors Or The EGR Valve/Cooler.
- Inspection: Check Mating Surfaces, Gaskets, Clamps And Adjacent Hoses. Clean Soot And Debris From The Intake And EGR Valve Area If Accessible.
- Replacement Parts: Always Fit New Gaskets And Replace Corroded Clamps Or Fasteners. Ensure Correct Orientation And Secure All Connections Evenly To Avoid Distortion.
- After Installation: Start The Engine And Check For Leaks, Abnormal Noises And Proper Engine Operation. Clear Any Diagnostic Trouble Codes And Perform A Road Test.
- Professional Tip: If The EGR System Is Heavily Sooted, Consider Cleaning The EGR Valve/Cooler And Turbo Inlet To Prevent Rapid Re-Contamination Of The New Pipe.
For mechanics and competent DIY enthusiasts, replacing this EGR pipe is a straightforward repair when adequate access is gained. Keep the manufacturer codes (9652264880, 161836) handy when ordering or cross-referencing parts to ensure correct fitment for 2.0 HDi RHR applications.
