IsItAGoodCar
Reliability Guide

Common Problems with the
2021 Subaru Outback Mk6 (BT)

Launch-year UK BT cars are the ones most likely to show early software rough edges in the big portrait touchscreen.

2
Known Issues
0
Serious
2
Moderate
0
Minor

All Known Issues

Thermo Control Valve Failure

ModerateCooling System

A sticking thermo control valve can trigger multiple warning lights and poor heater output, even though the engine may otherwise drive normally.

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

Check engine light, Weak cabin heat, Cooling-system warnings

What to Inspect:
  • Verify the heater gets warm quickly
  • Check for stored cooling-related codes
  • Ask if the valve has already been replaced under warranty or goodwill
Verified by IsItAGoodCar Research Team

Infotainment Freezing and Screen Glitches

ModerateElectrics & Electronics

Early BT cars can suffer laggy or freezing infotainment, which is particularly frustrating because so many climate and vehicle functions are routed through the main display.

Est. Repair Cost: £0–£1,200
Warning Signs:

Touchscreen lag, Random system reboot, Unresponsive climate controls

What to Inspect:
  • Test every major menu on the display
  • Check for software updates in the service record
  • Make sure the reverse camera loads promptly
Verified by IsItAGoodCar Research Team

Buying Tips for 2021 Subaru Outback Mk6 (BT)

  • ✓Spend extra time checking screen response, navigation and camera loading on 2021 cars.
2022–2023
Check a 2021 Subaru Outback Mk6 (BT) by Registration