2006 — 2008
2.2L I4 HDi (DW12BTED4)
Diesel
Perform full-lock turns at low speed and drive over speed bumps. | Note: Listen for distinct knocking or clunking sounds from the front end. The lower swivel joints (hub carriers) are a notorious failure point on the 407 suspension and are expensive to rectify.
Under load in 3rd or 4th gear, accelerate firmly from 1500rpm. | Note: Check for clutch slip or significant shuddering. The 2.2L HDi produces high torque which puts immense strain on the Dual Mass Flywheel (DMF), often requiring replacement by 120,000km.
Check the power steering fluid reservoir immediately after a spirited drive. | Note: Look for foaming or fluid 'bleeding' out of the cap. This indicates air ingress or a failing high-pressure pipe, a common 407 issue that can lead to heavy steering or pump failure.
Toggle all electronic switches, including windows, climate control, and display screens. | Note: The 407 uses a complex BSI (Body Systems Interface) multiplexing system. Gremlins often manifest as 'ghost' warnings on the dash or erratic behavior of the central display screen when it gets hot.
Standard synthetic oil service and cabin filter replacement. Use only Low-SAPS oil to protect the DPF.
Major service including fuel filter replacement and a health check of the Eolys DPF additive system.
Critical replacement interval for the timing belt (cambelt), tensioners, and water pump to avoid catastrophic engine failure.
Verify Eolys additive fluid levels for the FAP/DPF system.
Inspect the dual-turbo vacuum hoses for cracks or perished ends.
Clean the EGR valve to prevent carbon buildup and 'Depollution System' faults.
Check front lower swivel joints for play using a pry bar while on a hoist.
Ensure the battery is high-output (CCA) as low voltage triggers false ECU errors.
Estimated repair costs if issues arise
Essential every 10 years or 100-150k km. High labor component due to limited space in the 2.2L bay.
Usually replaced together. A major expense common on high-torque diesel variants.
Includes Eolys fluid refill and forced regeneration if the filter is blocked from city driving.
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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