2005 — 2009
2.7L HDi V6 (DT17TED4)
Diesel
Let the engine idle to operating temperature, then inspect the 'V' of the engine block and under the front bumper for any sweet-smelling pink or orange coolant leaks. | Note: The plastic thermostat coolant outlet housing on the 2.7 HDi is notorious for splitting. Overheating this V6 engine often leads to warped cylinder heads, blown head gaskets, or bottom-end bearing failure.
Perform a hard acceleration from a standstill up to 80 km/h, watching for black smoke, hesitation, or a 'Depollution System Fault' warning on the multi-function screen. | Note: Twin EGR valves frequently clog with carbon on these engines, especially if driven mostly on short urban trips in New Zealand. Replacing them requires extensive labor due to tight engine bay packaging.
Drive over speed bumps and uneven road surfaces at various speeds, switching between 'Sport' and 'Normal' suspension modes to check for warning lights or clunking sounds. | Note: The 607 V6 uses AMVAR electronically controlled dampers. These active struts are extremely expensive to replace and finding replacement stock in NZ is highly challenging.
Ensure the car is fully warmed up, then test transitions from Reverse to Drive and monitor for harsh 2nd-to-3rd gear upshifts or flares in engine RPM. | Note: The Aisin AM6 6-speed automatic gearbox is prone to valve body wear if the transmission fluid has not been changed regularly, despite Peugeot's original 'sealed for life' claim.
Routine engine oil and filter change using high-quality low-SAPS 5W-30 oil to protect the DPF, plus a full diagnostic scan for early fault codes.
Replace air, cabin, and fuel filters. Inspect the auxiliary drive belt, check the automatic transmission fluid (ATF) condition, and clean the EGR valves.
Major service: Replace the timing belt, water pump, and plastic thermostat housing. Change the automatic gearbox fluid, flush the cooling system, and inspect the DPF soot load.
Use only low-SAPS ACEA C2 or C3 engine oil to prevent premature Diesel Particulate Filter (DPF) clogging.
Monitor coolant levels weekly; the DT17TED4 engine has zero tolerance for even minor overheating episodes.
Regularly clear carbon buildup from the twin EGR valves and intake manifold to avoid limp-mode faults.
Flush and replace the AM6 automatic transmission fluid every 40,000 to 60,000 km despite the 'lifetime' rating.
Inspect the main crankshaft pulley (harmonic balancer) for rubber degradation, which can throw the auxiliary belt into the timing cover.
Estimated repair costs if issues arise
Crucial preventive maintenance required every 10 years or 100,000 km. Specialized labor is required due to tight engine bay packaging in the 607.
Active dampers are highly specialized. If they leak, importing parts from Europe is often the only option.
Accessing the rear turbo requires dropping the front subframe or removing the engine. High labor costs dominate this job in NZ workshops.
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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