2000 — 2003
3.0L 1MZ-FE V6 AWD
Petrol
While driving at low speeds and turning, listen for any clicking or knocking sounds from the front wheels; this can be an early indicator of CV joint wear which is common for an AWD vehicle of this age.
Check the automatic transmission shifting by accelerating gently; if you notice any harsh engagement or hesitations between gears, it is worth investigating the transmission fluid condition and service history.
With the engine at operating temperature, shift the vehicle into Neutral and briefly observe the idle smoothness; an uneven idle might suggest that the IAC (Idle Air Control) valve or throttle body could benefit from a professional clean.
During your inspection, check the carpet in the footwells and the spare wheel well for any dampness; while the RX is generally robust, ensuring the sunroof drains are clear is a smart way to prevent moisture buildup in older models.
Usually the time to ensure the initial cooling system refresh has been completed.
The key window for confirming the timing belt and water pump service has been performed, as the 1MZ-FE engine relies on a belt.
A common point to review suspension bushings and strut health to maintain that classic Lexus ride comfort.
Verify the timing belt replacement history, as this is the most critical item for the longevity of the 1MZ-FE engine.
Check the transmission fluid color and smell; it should be a healthy translucent red rather than dark or burnt.
Inspect the power steering hoses for any signs of weeping, as these can become brittle after two decades.
Confirm that the dashboard warning lights perform a self-check when the ignition is first turned on.
Take a look at the radiator top tank; if it has turned a deep brown or green, consider it a friendly nudge to plan for a new radiator.
Estimated repair costs if issues arise
Since the 1MZ-FE uses an interference engine design, keeping the timing belt fresh is essential maintenance. If this hasn't been done recently, you should plan for this cost to ensure peace of mind for the next 100,000km.
After many years on New Zealand roads, the original rubber bushings in the suspension arms may show signs of perishing. You might eventually need to budget for these to restore that smooth, quiet Lexus driving experience.
On this specific engine, the knock sensors are located underneath the intake manifold. Should they trigger a check engine light, the labor involved is significant, so it's a good item to keep in mind for long-term budget planning.
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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