2003 — 2009
3.5L (VQ35DE) - V6 Highway Star/Performance version
Petrol
Listen carefully for any 'clunking' noises from the front suspension when going over speed bumps, as the front control arm bushings on the U31 platform can wear over time in our NZ driving conditions.
Cycle through the CVT (Continuously Variable Transmission) gears while stationary and then under light acceleration; ensure the transition is smooth without any hesitation or stuttering, as these transmissions prefer consistent care.
Check the electrical sliding doors by opening and closing them repeatedly; ensure they operate fluidly without getting stuck, as the motor sensors can occasionally become sensitive with age.
Watch the temperature gauge closely during a 15-minute drive; ensure it sits steady in the middle, as cooling system components may eventually require an inspection to maintain optimal V6 performance.
Usually a prime time to check the condition of the radiator and serpentine belt tensioner.
Consider having the spark plugs inspected, as they are a bit of a reach on the VQ35DE engine due to the intake plenum configuration.
A good point to verify the status of the alternator and starter motor to ensure ongoing reliability.
Keep up with premium engine oil changes every 8,000km to look after the complex valve train in that V6 engine.
Periodically check your coolant levels; keep the system clean to avoid any unnecessary heat stress.
Give the sliding door tracks a light clean and silicone spray every few months to keep the mechanisms moving freely.
Have your local mechanic perform a pre-purchase inspection that specifically includes a scan of the transmission control module.
Ensure your tyres are balanced and aligned properly to make the most of the Highway Star's comfortable road handling.
Estimated repair costs if issues arise
Future Budget Planning: While the CVT provides a smooth ride, it appreciates regular fluid changes. If you notice any lag, you might eventually need to budget for a specialized transmission flush.
Future Budget Planning: Accessing the rear spark plugs requires removing the intake manifold. When the time comes for a major tune-up, it is wise to set aside funds for the labor-intensive replacement.
Future Budget Planning: Depending on the car's history, the heavy V6 engine can be firm on the front struts and bushings. You may eventually need to budget for new shocks and mounts to maintain that 'Highway Star' ride quality.
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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