Reliability Guide

Common Problems with the
2018 Lexus LS (Mk5)

The 2018 launch of the Mk5 LS (XF50) was a radical departure, abandoning the conservative styling of previous generations for a striking, coupe-like silhouette. It also dropped the V8 engine entirely in favour of a new twin-turbo V6 hybrid.

What changed for 2018

  • Debut of the all-new Mk5 LS on the advanced GA-L platform.
  • Introduction of the new 3.5-litre V6 'Multi Stage Hybrid' system (LS 500h), dropping the V8.

Common MOT watch-outs

  • !Too new for significant MOT failure trends, but check for early tyre wear on large alloy wheels.
  • !Minor software glitches affecting the complex infotainment or safety systems.
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

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

Buying Tips for 2018 Lexus LS (Mk5)

  • The 'Multi Stage Hybrid' system can feel slightly rubbery during hard acceleration; ensure you are comfortable with its power delivery.
  • Check the operation of the advanced driver assistance systems and the complex massage seats.