2000 — 2005
3.0L 6G72 V6 (AWD)
Petrol
Test Drive Task: When transitioning from a stop, pay close attention to the gear shifts. | Observation: In the second-generation Diamante, the INVECS-II automatic transmissions can occasionally show signs of wear. Smooth, non-jerky transitions are what you want to feel.
Test Drive Task: During your inspection, park on a clean patch of concrete and let the engine run for several minutes. | Observation: The 6G72 V6 is generally robust, but given the age of these vehicles, keep an eye out for any oil seepage around the rocker covers or rear main seal which is common in higher-mileage examples.
Test Drive Task: While cruising at a steady speed on the open road, listen for any 'clunking' or vibrations through the steering wheel. | Observation: The AWD system and suspension components, particularly CV joints and bushes, are working hard; any unusual noises might suggest it's time for a suspension refresh.
Test Drive Task: Before heading out, turn the ignition to the 'on' position and ensure all warning lights illuminate and then extinguish. | Observation: Be mindful of any persistent ABS or airbag lights; these electrical systems can be a bit temperamental as wiring harnesses age, and a quick scan can save you a headache later.
Usually the time to ensure the timing belt and water pump have been addressed, as these are critical for the 6G72 engine longevity.
A common point where secondary cooling system hoses and radiator integrity should be evaluated to prevent overheating.
Consider a full fluid flush cycle for the AWD differential and transmission to keep the drivetrain feeling responsive.
Check the timing belt service history stickers in the engine bay; if there is no record, it is a smart move to get it done as a precaution.
Inspect the coolant color; a vibrant green or red without cloudiness is a good sign the cooling system has been cared for.
Verify the air conditioning operation, as the climate control modules can occasionally develop minor electronic quirks in this generation.
Check for even tyre wear across all four wheels, which helps confirm the AWD system is behaving as it should.
Inspect the underbody for any signs of heavy corrosion, especially if the vehicle has spent time near coastal areas.
Estimated repair costs if issues arise
Because this engine uses a timing belt, it’s a vital maintenance item. If the previous owner doesn't have a receipt, you should eventually budget for this to ensure total peace of mind.
Over years of New Zealand road use, rubber components perish. Depending on the ride quality you prefer, you might eventually need to budget for a suspension refresh to restore that smooth 'Diamante' comfort.
If this component needs attention in the future to keep the shifts smooth, a professional fluid exchange is a proactive way to extend the life of the unit.
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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