2004 — 2006
1.3L (M135) - Mid-range petrol
Petrol
While accelerating gently in lower gears, listen for a 'rattle' from the engine bay; this could indicate timing chain wear, which is worth having a mechanic investigate on these M135 engines.
Check the operation of the Automated Manual Transmission (AMT) by shifting through all gears while stationary and moving; any significant hesitation or 'clunking' suggests the clutch actuator might need recalibration or future attention.
Inspect the cabin floor carpets and the boot area for dampness; the W454 can occasionally suffer from blocked sunroof or door seal drains, which is common in older vehicles.
Verify all electrical functions, specifically the central locking and window switches, as these units can develop minor wiring quirks as they age.
Usually marks the point where suspension bushings and engine mounts begin to show signs of perishing.
A common interval for checking the health of the clutch assembly and alternator charging performance.
A stage where cooling system components like the water pump and thermostat may require proactive inspection.
Keep a consistent eye on engine oil levels, as these petrol units perform best with fresh, quality synthetic oil.
Ensure the cooling system is flushed periodically, as modern pressure-tested hoses can become brittle over time.
Regularly lubricate the door hinges and latch mechanisms to keep the action smooth.
Keep the air conditioning system running occasionally, even in winter, to keep the seals lubricated and the gas pressure steady.
Have the spark plugs replaced according to the service manual to ensure the 1.3L engine runs efficiently and idle remains steady.
Estimated repair costs if issues arise
Because these aren't traditional manual gearboxes, the actuator works hard to manage gear changes. Depending on the car's history, you might eventually need to budget for a sensor calibration or a replacement actuator motor if gear changes feel lethargic.
If this component needs attention in the future, such as worn shock absorbers or control arm bushings, the estimated cost in NZ is reflective of parts availability and labour to restore that 'smart' handling feel.
While the chain is designed for longevity, if it begins to stretch or rattle, you should consider setting aside funds for a full timing set replacement to ensure engine longevity.
Noticed something inaccurate or missing?Suggest an edit→
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