IsItAGoodCar
Reliability Guide

Common Problems with the
2021 Lexus LS (Mk5)

A subtle facelift focused heavily on improving ride comfort, addressing criticisms that the initial Mk5 was too firm. It also introduced a much-needed touchscreen interface, replacing the frustrating touchpad.

What changed for 2021

  • •Suspension and tyre updates specifically aimed at improving ride comfort and reducing harshness.
  • •Introduction of a new touchscreen infotainment system, moving the screen closer to the driver.

Common MOT watch-outs

  • !Minor sensor faults relating to the parking or driver assist systems.
  • !General wear and tear commensurate with luxury use.
2
Known Issues
0
Serious
1
Moderate
1
Minor

All Known Issues

12V Battery Drain

ModerateElectrics & Electronics

Like many modern high-tech Lexus models, the LS 500h can suffer from a flat 12V battery if left unused for as little as a week.

Est. Repair Cost: £200–£300
Warning Signs:

Car unresponsive to key fob, Multiple warning lights on startup, Settings resetting

What to Inspect:
  • Ask about the car's usage patterns
  • Check for a recent 12V battery replacement
Verified by IsItAGoodCar Research Team

Run-Flat Tyre Noise and Wear

MinorSuspension & Chassis

The standard run-flat tyres are prone to road noise and can wear unevenly, leading to a degraded driving experience.

Est. Repair Cost: £300 per tyre
Warning Signs:

Loud humming from the road, Vibration through the steering wheel, Premature inner-edge wear

What to Inspect:
  • Check the brand and condition of the tyres
  • Listen for excess road roar at motorway speeds
Verified by IsItAGoodCar Research Team

Buying Tips for 2021 Lexus LS (Mk5)

  • ✓Ensure the new touchscreen operates smoothly and all smartphone integration functions correctly.
  • ✓Verify all 'Over The Air' software updates have been applied to ensure optimal system performance.
2019–20202022
Check a 2021 Lexus LS (Mk5) by Registration