Reliability Guide

Common Problems with the
2020 Lexus UX

We've identified 2 known issues that can affect the 2020 Lexus UX. None are considered critical, but they're worth knowing about before you buy.

Known Issues

Serious

Moderate

Minor

All Known Issues

ModerateElectrics & Electronics

The most common complaint on UX owner forums; the 12V battery is small and can be drained by the car's connected systems.

Est. Repair Cost: £150–£200

Warning Signs:

Weak cranking, "Check Hybrid System" warning caused by low voltage, Keyless entry not working

What to Inspect:

Ask if the 12V battery has been replaced with a higher-capacity aftermarket unit (e.g. Yuasa)

Verified by IsItAGoodCar Research Team

MinorSuspension & Chassis

Models on 18-inch wheels with run-flat tyres can suffer from significant road roar on coarse UK motorways.

Est. Repair Cost: £600 (Set of non-run-flat tyres)

Warning Signs:

Loud humming from tyres, Harsh ride over expansion joints

What to Inspect:

Verified by IsItAGoodCar Research Team

✓Ensure you can fit your luggage in the boot; the hybrid battery makes it quite shallow.
✓Test the run-flat tyres; if they are near the end of their life, they can be very noisy.
✓Consider the 2022+ model for the improved touchscreen interface.