2001 — 2004
2.2L HDi I4 (DW12TED4)
Diesel
Cycle through all electrical features repeatedly: test all electric windows, memory seats, dual-zone climate control, motorized boot lid, and check for warning messages on the center screen. | Note: The 607 uses an early French multiplex (VAN/CAN bus) system. Moisture ingress into the cabin or doors can cause the BSI (body control module) to glitch, leading to phantom electrical faults that are notoriously difficult to trace.
Perform a sustained, hard acceleration up a steep hill to put the engine under load, checking for black smoke, power flat-spots, or a 'Depollution System Faulty' warning. | Note: The DW12TED4 engine relies on an early vacuum-operated swirl flap diaphragm (often called the SWIRL valve). The plastic actuator arm or rubber diaphragm frequently splits, causing boost loss, sluggishness, and limp mode.
Drive at low speeds and listen for a metallic rattling or clattering sound when dipping the clutch (on manual models) or check for harsh downshifts and slipping when warm (on automatic ZF 4HP20 models). | Note: Manuals suffer from Dual-Mass Flywheel (DMF) wear, which is expensive to replace. The ZF automatic transmission can suffer from torque converter clutch failure if the fluid was never changed under the 'filled-for-life' myth.
Check the instrument cluster carefully for any FAP (Diesel Particulate Filter) or low additive level warnings upon startup and during the drive. | Note: This vehicle uses a wet FAP system requiring Eolys additive. If the fluid runs dry or the additive pump fails, the DPF will block rapidly, requiring specialized diagnostic software (Diagbox/Lexia) to reset and regenerate.
Perform a standard oil change using high-quality low-SAPS oil (such as Total Quartz Ineo ECS 5W-30) to protect the FAP system. Inspect the front suspension control arms and drop links for early play on rough chip-seal roads.
Replace the high-pressure common-rail fuel filter and engine air filter. Drain and refresh the automatic transmission fluid (or manual gearbox oil) to prevent internal valve body wear. Check and top up the Eolys DPF additive fluid level.
Replace the timing belt, tensioners, and water pump (due every 100,000km or 5 years). Inspect the crankshaft harmonic balancer pulley (accessory belt drive) for rubber separation, which can ruin the timing system if it disintegrates.
Verify the timing belt and water pump replacement history; this is a critical interference engine.
Inspect the Eolys additive tank level and look for signs of physical damage or leaks under the rear axle.
Examine front lower control arm rear bushes and ball joints, which are heavily taxed by the weight of the 2.2L HDi cast-iron block.
Scan the vehicle's BSI and ECU with a Peugeot-specific Diagbox tool to identify hidden multiplex or sensor communication codes.
Test the main battery voltage and charging system; low voltage is the root cause of 90% of phantom dashboard errors in this model.
Estimated repair costs if issues arise
Preventative maintenance highly recommended unless documentation proves it was done recently. Sourcing parts in NZ can require importing from Europe.
Requires professional handling due to the carcinogenic nature of Eolys fluid, followed by a software counter reset using a dedicated PSA scanner.
If the cabin suffers water leaks from blocked sunroof drains or windscreen seals, the BSI module will fail, requiring a replacement and complex coding.
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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