IsItAGoodCar
Reliability Guide

Common Problems with the
2015 Smart Fortwo (453)

The 453 Fortwo launched in 2014 on a Renault Twingo-shared platform, offering a much better ride and the option of a proper manual gearbox or Twinamic dual-clutch transmission. The 0.9 turbo engine is more desirable for motorway use, and the rear-engined layout gives an incredibly small turning circle.

What changed for 2015

  • •New Renault Twingo-shared platform
  • •Rear-engined layout for tight turning circle
  • •0.9 turbo and 0.9 NA petrol engines
  • •Twinamic dual-clutch gearbox option
  • •Manual gearbox available for the first time on a Smart

Common MOT watch-outs

  • !Air conditioning condenser easily damaged by road debris
  • !12V battery failure causing cascading electrical warnings
  • !DCT gearbox clutch actuator motor failure at 40k–80k miles
  • !Electronic module glitches
4
Known Issues
0
Serious
1
Moderate
3
Minor

All Known Issues

DCT Gearbox Clutch Actuator Motor Failure

ModerateGearbox & Transmission

The dual-clutch transmission uses electric actuator motors that can corrode or seize, causing loss of even or odd gears. The lower motor (M15) is accessible but the upper motor (M14) requires intake manifold removal.

Est. Repair Cost: £300–£800
Warning Signs:

Loss of even or odd gears, Gear selection failure, Clunking or rattling from gearbox, Gearbox warning light

What to Inspect:
  • Test all gears during the drive
  • Listen for rattling from the gearbox area
  • Check for gearbox fault codes
Verified by IsItAGoodCar Research Team

Air-conditioning Condenser Leak

MinorElectrics & Electronics

The condenser is highly exposed at the front of the car and is easily damaged by road debris or corrosion.

Est. Repair Cost: £350–£550
Warning Signs:

Air conditioning not blowing cold, Hissing sound from vents

What to Inspect:
  • Look for oily stains on the condenser through the front bumper
Verified by IsItAGoodCar Research Team

12V Battery Failure

MinorElectrics & Electronics

The standard 12V batteries on 453 models seem to have a short lifespan, leading to a cascade of scary but false electrical warning lights.

Est. Repair Cost: £100–£180
Warning Signs:

Multiple error messages on dash, Start-stop system not working, Slow cranking

What to Inspect:
  • Check the age and health of the battery if the car has weird electrical glitches
Verified by IsItAGoodCar Research Team

Electronic Module Glitches and Software Bugs

MinorElectrics & Electronics

Various electronic modules including central locking, power windows, and the on-board computer can suffer from software bugs, bad contacts, or connector corrosion.

Est. Repair Cost: £100–£400
Warning Signs:

Central locking failures, Infotainment freezing or rebooting, Power window malfunctions, Random warning lights

What to Inspect:
  • Test all electronic features
  • Check for software update history
  • Inspect connectors under seats for corrosion
Verified by IsItAGoodCar Research Team

Buying Tips for 2015 Smart Fortwo (453)

  • ✓The 0.9 turbo is better for motorway use but check for turbo lag or boost leaks
  • ✓On Twinamic models, ensure shifts are seamless — much smoother than older single-clutch Smarts
  • ✓Check the infotainment system for software updates
20142016–2018
Check a 2015 Smart Fortwo (453) by Registration