holden commodore sv6 2007 problems

The 2007 Holden Commodore SV6 is a fine Aussie sedan, but time has a way of loosening bolts and tempers alike. Typical problems owners report include a few mechanical gremlins that are more persistent than a parking inspector.

• Timing chain stretch on the Alloytec 3.6 (check-engine light, rough running; often codes P0008/P0009); fix is a chain kit with updated tensioners.
• Power steering pump/hose leaks or whine, especially at low speeds.
• Front lower control arm bushes and strut tops wearing, causing clunks and uneven tyre wear.
• Ignition coils and cam/crank sensors causing misfires or hard starts.
• Cooling leaks from thermostat housing or water pump.
• Brake shudder from warped front rotors.
• Auto transmission shudder/harsh shifts if fluid is neglected; servicing helps.
• HVAC blend-door actuator clicking and door-lock actuators failing.

Most fixes are straightforward and well known to independent workshops; budget a few grand if the timing chain is due, less for hoses, bushes and rotors. Always get a pre-purchase inspection and a scan for codes; it’ll save you from inheriting someone else’s dashboard Christmas tree.