2001 — 2004
3.0L V6 (ES9J4S)
Petrol
Perform several hard accelerations and check for hesitation, engine stumbling, or a 'Depollution System Fault' warning on the multi-function display. | Note: The ES9J4S V6 engine is notorious for ignition coil failures (particularly the original Sagem units). Misfires can damage the catalytic converters, which are expensive to replace in New Zealand.
Cycle through the AMVAR active suspension modes (Sport vs. Comfort) and drive over speed bumps to listen for knocking sounds or an excessively harsh ride. | Note: The electronically controlled dampers are prone to leaking or electrical failures. Replacement AMVAR struts are extremely difficult to source in NZ and cost a fortune compared to standard dampers.
Pay close attention to the automatic transmission shifting, especially when warm. Feel for harsh downshifts from 3rd to 2nd or slipping gears. | Note: Whether equipped with the early ZF 4HP20 or the later Aisin TF-80SC 6-speed, these gearboxes suffer from valve body wear if the fluid has never been changed, eventually leading to gearbox failure.
Test every single electrical accessory: power seats, rear sunblind, memory mirrors, dual-zone climate control, and check if the clock/trip computer resets upon startup. | Note: The 607 uses a complex dual-battery system (one starter battery under the bonnet, one service battery in the boot). A weak service battery causes baffling multiplex (BSI) electrical gremlins and false warning lights.
Routine engine oil and filter change using high-quality total quartz synthetic oil. Inspect the cabin pollen filter and check the dual-battery system voltage charging rates.
Replace spark plugs (demands removal of the upper intake plenum on this V6), change air filter, perform a partial automatic transmission fluid flush, and inspect brake pads and discs.
Critical timing belt, tensioners, and water pump replacement interval. This is a labor-intensive job on the transverse V6. Inspect engine mounts, VVT solenoids, and check for oil leaks from the rear cam covers.
Strictly adhere to the timing belt replacement interval (every 100,000km or 5 years) to prevent catastrophic engine failure.
Regularly monitor and replace the boot-mounted auxiliary service battery to keep the multiplex wiring system stable.
Perform automatic transmission fluid drains and refills every 40,000km to prolong valve body life, despite Peugeot's 'sealed for life' claim.
Inspect the rear valve cover and cam seals for oil leaks that can drip onto the hot exhaust manifold, causing smoke and burning smells.
Inspect the condition of the active suspension damper boots and wiring harnesses to prevent moisture ingress into the actuators.
Estimated repair costs if issues arise
Extremely tight packaging in the engine bay requires significant labor hours. Always replace the water pump and tensioner pulleys at the same time.
Genuine electronically-controlled replacement dampers are scarce in New Zealand. Some owners opt to convert to standard 607 dampers, though this requires coding out the system.
Replacing all 6 coils (reputable brands like Delphi or Bosch are recommended) and spark plugs requires removing the intake manifold plenum, driving up labor.
Required if the transmission exhibits severe shift flares or harsh engagement when warm. Must be performed by an automatic transmission specialist.
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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