IsItAGoodCar
Reliability Guide

Common Problems with the
2020 Subaru Impreza Mk5 (GT/GK)

Mid-cycle models benefit from improved software and build quality but still carry the same infotainment and cooling system weaknesses. These are often the best value examples on the used market.

What changed for 2020

  • •Updated infotainment system
  • •Revised safety equipment options
  • •Improved hybrid system integration

Common MOT watch-outs

  • !Thermo control valve failure becoming more common
  • !CVT fluid degradation on high-mileage cars
  • !Infotainment glitches requiring dealer updates
2
Known Issues
0
Serious
2
Moderate
0
Minor

All Known Issues

Thermo Control Valve Failure

ModerateCooling System

Later Mk5 cars can suffer thermo control valve faults, bringing up warning lights and poor heater performance without obvious external coolant leaks.

Est. Repair Cost: £400–£900
Warning Signs:

Engine warning light, Cabin heater stays lukewarm, Cooling fans running oddly

What to Inspect:
  • Check heater performance from cold
  • Ask if the valve has already been replaced
  • Scan the car for stored cooling-related fault codes
Verified by IsItAGoodCar Research Team

Infotainment Touchscreen Freezing or Delamination

ModerateElectrics & Electronics

The Starlink-era head unit can become slow, glitchy or develop screen faults, which is irritating on a car that is otherwise very user-friendly.

Est. Repair Cost: £0–£900
Warning Signs:

Frozen display, Ghost touches, Bluetooth or camera dropout

What to Inspect:
  • Try navigation, media and phone pairing
  • Watch for delayed reverse camera loading
  • Check whether the head unit has already been updated or replaced
Verified by IsItAGoodCar Research Team

Buying Tips for 2020 Subaru Impreza Mk5 (GT/GK)

  • ✓Check if the thermo control valve has been replaced
  • ✓Ask for evidence of CVT fluid servicing
  • ✓Test all safety systems including EyeSight
20192021
Check a 2020 Subaru Impreza Mk5 (GT/GK) by Registration