IsItAGoodCar
Reliability Guide

Common Problems with the
2023 Subaru Impreza Mk5 (GT/GK)

Final year of the current Mk5 Impreza. These newest examples should have all known issues resolved if properly maintained, making them excellent value for those seeking a safe, capable hatchback.

What changed for 2023

  • •Final production year for current generation
  • •All models now include advanced safety features as standard

Common MOT watch-outs

  • !Minor electronic glitches in the latest infotainment
  • !Brake wear on cars with low annual mileage
  • !Tyre pressure monitoring system warnings
1
Known Issues
0
Serious
1
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

Buying Tips for 2023 Subaru Impreza Mk5 (GT/GK)

  • ✓Look for a full Subaru service history
  • ✓Test all safety systems thoroughly
  • ✓Verify the hybrid system operates smoothly
2022
Check a 2023 Subaru Impreza Mk5 (GT/GK) by Registration