IsItAGoodCar
Reliability Guide

Common Problems with the
2020 Smart Fortwo (453)

The 2019/2020 facelift introduced updated styling, the EQ rebrand for electric models, and revised Media-System graphics. Petrol models continued with the 0.9 turbo and 1.0 naturally aspirated engines, while the EQ Fortwo became the sole offering from 2020 onwards. The Twinamic DCT and manual gearbox options were carried over.

What changed for 2020

  • •2019/2020 facelift with revised front and rear styling
  • •Smart EQ rebrand for electric models
  • •Updated Media-System with new graphics
  • •Petrol and EQ variants sold alongside each other

Common MOT watch-outs

  • !DCT clutch actuator motor failure at 40k-80k miles
  • !Air conditioning condenser damage from road debris
  • !12V battery failure causing cascading electrical warnings
  • !Electronic module glitches and software bugs
3
Known Issues
0
Serious
1
Moderate
2
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

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 2020 Smart Fortwo (453)

  • The 2020 facelift cars benefit from the latest software updates
  • On Twinamic models, test shifts in stop-start traffic for judder
  • Check that the EQ models have the 22 kW onboard charger option if rapid AC charging is needed
20192021
Check a 2020 Smart Fortwo (453) by Registration