2007 — 2015
0.8L CDI - Updated Turbo Diesel
Diesel
Listen closely for any 'lumpy' gear changes or hesitation while accelerating, as the automated manual transmission (AMT) actuators may show signs of wear over time.
Turn the steering wheel fully to the left and right while stationary to listen for any clicking or grinding noises which could indicate worn CV joints or suspension bushings.
Check the turbo response by accelerating briskly on an open road; if the car feels lethargic or enters 'limp mode', the turbocharger or vacuum hoses may require professional inspection.
Inspect the floor carpets and the boot area for any signs of dampness, as the W451 can occasionally develop leaks around the door seals or rear hatch glass.
Usually marks the interval where suspension components and engine mounts may start to show their age.
A common point to confirm if the alternator, starter motor, and water pump have been inspected or refreshed.
Likely time to consider a deep dive into the diesel particulate filter (DPF) health and fuel injector efficiency.
Regularly check the tyre pressures, as the Smart is sensitive to imbalances and correct pressure helps with fuel economy.
Ensure the engine oil and filter are changed every 10,000km, as these small diesel engines thrive on clean oil.
Verify the service history specifically for the transmission fluid; keeping this fresh helps the AMT shift smoothly.
Keep an eye on the coolant levels; maintaining the cooling system is key to the longevity of the turbocharger.
Periodically clear out the air intake tracks to ensure the engine is breathing efficiently.
Estimated repair costs if issues arise
In cars of this age, the clutch actuator can eventually lose its precision. If the car struggles to engage gears, you might eventually need to budget for a replacement or a recalibration session.
If the turbo shows signs of oil weep or loss of boost pressure, it is common to consider a refurbishment or replacement. Planning for this ensures you aren't caught off guard later on.
If the vehicle is used mostly for short city hops, the DPF may require a professional deep clean to clear accumulated soot. It's a wise move to factor this into your long-term ownership costs.
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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