2004 — 2008
1.6L I4 HDi (DV6TED4)
Diesel
Listen for a high-pitched whistle from the engine bay or a distinct lack of power under acceleration. | Note: The DV6 engine is prone to turbocharger failure caused by oil carbonization in the feed pipes. Any turbo noise is a major red flag.
Perform full-lock turns at low speed and drive over speed bumps while listening for knocking or creaking. | Note: The 407 uses a complex front suspension setup. The lower swivel hub ball joints are high-wear items and frequently fail NZ Warrant of Fitness inspections.
Check the engine bay specifically around the base of the fuel injectors for black, carbonized 'tar' (Black Death). | Note: Leaking copper injector washers allow combustion gases to escape, leading to sludge buildup that eventually starves the turbo of oil.
Monitor the multi-function display for 'Depollution System Fault' warnings during a spirited drive. | Note: This often indicates a blocked DPF (Diesel Particulate Filter) or issues with the EGR valve, which are expensive to rectify if the car has been used for short city trips.
Standard synthetic oil service and filter. Ensure the specific Peugeot-approved 5W30 C2 oil is used to protect the DPF.
Replacement of fuel filter and cabin filter. Inspection of brake pads and rotors as the 407 is a heavy car and wears them quickly.
Critical cambelt (timing belt) and water pump replacement interval. Also requires checking the Eolys DPF additive fluid levels.
Verify oil changes have been performed every 10,000km regardless of the factory 20,000km recommendation.
Inspect the lower swivel ball joints for play and ensure boots are not split.
Check the condition of the vacuum hoses for the turbo actuator for any signs of perishing.
Verify the operation of the center dashboard LCD screen (pixels often fail when the unit gets hot).
Confirm that the correct Eolys additive has been topped up to prevent DPF clogging.
Estimated repair costs if issues arise
High cost due to the necessity of flushing the entire oil system and replacing feed pipes to prevent repeat failure.
Vibrations at idle or clutch chatter usually mean the DMF is failing; best replaced as a complete kit.
A common WOF failure. Parts are moderately priced but labor can add up if they are seized.
Preventative maintenance required every 10 years or 100k km to avoid catastrophic engine failure.
Noticed something inaccurate or missing?Suggest an edit→
Disclaimer: This report is generated with the assistance of AI analysis based on verified automotive data. While we strive for 100% accuracy, enthusiasts should always conduct physical inspections and consult service records. View Full Disclaimer