IsItAGoodCar
Reliability Guide

Common Problems with the
2017 Subaru Impreza Mk5 (GT/GK)

The launch year for the Mk5 Impreza. Early models introduced the Subaru Global Platform and improved safety, but the infotainment freezing and thermo control valve issues were present from the start.

What changed for 2017

  • •Launch of the Mk5 Impreza on Subaru Global Platform
  • •Introduction of EyeSight driver assist
  • •Improved structural rigidity

Common MOT watch-outs

  • !Infotainment touchscreen freezing or delaminating
  • !Thermo control valve failure affecting heater
  • !CVT hesitation on neglected examples
3
Known Issues
0
Serious
3
Moderate
0
Minor

All Known Issues

Suspension Knocking (Top Mounts, Bushes, Drop Links)

ModerateSuspension & Chassis

A long-running owner complaint on Impreza forums is a knock or clunk from the front end on bumps or when turning lock to lock, usually traced to worn strut top mounts, anti-roll bar drop links or wishbone bushes. Suspension is a leading MOT failure category on this model.

Est. Repair Cost: £200–£600
Warning Signs:

Knock or clunk from the front over bumps, Clunking when turning lock to lock, Worn strut top mounts or drop links

What to Inspect:
  • Bounce each front corner listening for knocks
  • Turn the steering lock to lock and listen underneath
  • Ask whether strut mounts or drop links have been replaced
Verified by IsItAGoodCar Research TeamUpdated

Ignition Coil / ECM Engine-Stall Recall

ModerateElectrics & Electronics

Certain 2016-2019 Imprezas were subject to an official UK recall for a possible engine stall with failure to restart, traced to the ignition coils and engine-control-module software. The remedy is a free ECM reprogramme and ignition-coil replacement where needed; not every affected car has had the work done, so the VIN should be checked on the GOV.UK recall register.

Est. Repair Cost: £0 (free recall fix)
Warning Signs:

Engine stalls unexpectedly, Failure to restart after a stall, Intermittent loss of power

What to Inspect:
  • Check the VIN on the GOV.UK vehicle recall checker
  • Ask whether the ignition-coil recall work was carried out
  • Watch for any stalling during the test drive
Verified by IsItAGoodCar Research TeamUpdated

Exhaust System Corrosion and Leaks

ModerateExhaust & Emissions

The Impreza's exhaust can corrode under UK winter salt, causing blowing or rattling noises and an MOT failure on exhaust, emissions and leaks. This failure area is well represented in the Impreza's MOT record, especially on higher-mileage cars.

Est. Repair Cost: £250–£600
Warning Signs:

Loud exhaust roar or hissing, Rattling from underneath the car, Failed MOT on exhaust, emissions or leaks

What to Inspect:
  • Listen for an exhaust blow with the engine cold
  • Inspect the silencer and pipes for rust holes
  • Check MOT history for repeated exhaust advisories
Verified by IsItAGoodCar Research TeamUpdated

Buying Tips for 2017 Subaru Impreza Mk5 (GT/GK)

  • Test the touchscreen thoroughly for responsiveness
  • Check the heater performance from cold
  • Ask about any software updates for the infotainment