UK Reliability Directory

Subaru Outback Mk6 (BT)

Production Years: 2021 - 20232 Documented Faults

The BT is a large, plush and petrol-only Outback for the UK market. It avoids the old diesel pitfalls, but early cars are heavily software-led and can still produce expensive warning-light faults.

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Common Faults & Reliability

These are the most common documented problems for the Subaru Outback Mk6 (BT), sorted by their typical impact and frequency.

Thermo Control Valve Failure

medium severity

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

Infotainment Freezing and Screen Glitches

medium severity

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

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