What is the Thermo Control Valve Failure problem on a 2022 Subaru Impreza Mk5 (GT/GK)?

Common Problems with the
2022–2023 Subaru Impreza Mk5 (GT/GK)

We've identified 1 known issue that can affect the 2022–2023 Subaru Impreza Mk5 (GT/GK). None are considered critical, but they're worth knowing about before you buy.

Known Issues

Serious

Moderate

Minor

The 2022–2023 period has an average number of reported issues compared to other Subaru Impreza Mk5 (GT/GK) year periods.

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.

Estimated cost: £400–£900Affects: 2019–2023

Typical symptoms

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

What to inspect before you buy

✓Check heater performance from cold
✓Ask if the valve has already been replaced
✓Scan the car for stored cooling-related fault codes

Buying Tips for the 2022 Subaru Impreza Mk5 (GT/GK)

✓If the windscreen has ever been replaced, make sure Eyesight works properly and the cameras were recalibrated.
✓A healthy 12V battery matters on these cars because weak voltage can trigger a lot of confusing dashboard warnings.
✓Test the touchscreen, Bluetooth and reverse camera carefully rather than assuming a software reset will cure everything.

2019–2021 Subaru Impreza Mk5 (GT/GK)