2000 — 2004
2.0L I4 HDi (DW10ATED)
Diesel
Drive over speed bumps or uneven surfaces at low speed. | Note: Listen for metallic clunking from the rear. The 406 uses a complex multi-link rear suspension; worn drop links and passive steer bushes are common and degrade the ride quality.
Perform a full-throttle acceleration in 3rd gear from 1,800rpm. | Note: Watch for 'Limp Mode' or flat spots. Clogged EGR valves and failing Mass Air Flow (MAF) sensors are frequent on the DW10ATED, often caused by short-trip urban driving.
Operate the indicator stalks repeatedly while turning the steering wheel. | Note: The COM2000 switch unit is notoriously fragile. If the indicators 'flop' back or the headlights flicker, the entire steering column unit likely needs replacement.
Check for vibrations through the clutch pedal at idle and during take-off. | Note: The Dual Mass Flywheel (DMF) on these HDi models can fail. A pulsing pedal or a 'clatter' when turning off the engine signals an imminent and expensive repair.
Standard synthetic oil service (5W40) and fuel filter inspection; HDi injectors are sensitive to fuel contaminants.
Major service including brake fluid flush, coolant renewal, and auxiliary drive belt inspection.
Critical Timing Belt (Cambelt) and Water Pump replacement interval; failure is catastrophic for the DW10 engine.
Verify Timing Belt/Water Pump replacement history (vital every 5-8 years or 100k km).
Inspect the lower engine 'P' bush (engine mount) for excessive engine movement.
Check for oil leaks around the turbocharger return pipe and valve cover.
Ensure the fuel filter is replaced every second service to protect the high-pressure pump.
Assess the condition of the radiator and cooling fans, as the relays often corrode.
Estimated repair costs if issues arise
Essential preventative maintenance to avoid engine internal damage.
Significant labor involved; often requires subframe adjustment to access.
Common electrical failure; price varies if sourced as a new OEM part versus used.
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