Reliability Guide

Common Problems with the
2007 Smart Fortwo (451)

We've identified 2 known issues that can affect the 2007 Smart Fortwo (451). 1 of these are serious faults that could be expensive to repair.

Known Issues

Serious

Moderate

Minor

The 2007 period has 1 more issue than the Smart Fortwo (451) average across all year periods.

All Known Issues

SeriousElectrics & Electronics

In the UK, water can enter the cabin via the door seals or heater intake and track down to the SAM unit (located in the passenger footwell).

Most affected: All RHD models

Estimated cost: £500–£1,000Affects: 2007–2014Often appears around: Any age

ModerateGearbox & Transmission

The actuator that operates the clutch can seize or wear out, leading to jerky gear changes or failure to select drive.

Most affected: All automated manual models

Estimated cost: £300–£600Affects: 2007–2014Often appears around: 40,000–70,000 miles

✓Listen for a "creaking" noise from under the car when the ignition is turned on

✓Check the automated manual gearbox for hesitation; while improved, the clutch actuator still requires periodic electronic adjustment and lubrication.
✓Listen for a rattling noise on startup from the 1.0-litre Mitsubishi engine, which can indicate timing chain wear on high-mileage examples.
✓Inspect the panoramic roof (if fitted) for crazing or cracking in the polycarbonate material.
✓Check the operation of the air conditioning; condenser failures are common due to stone damage at the front of the car.
✓Look for dampness in the boot area, as the rear window seals can leak over time.
✓Ensure the heater blower motor operates smoothly; they are prone to squeaking and failing, and replacement is awkward.