IsItAGoodCar
Reliability Guide

Common Problems with the
2024 Lexus RX (Mk5)

The latest RX continues to build its reputation, offering exceptional refinement and efficiency, particularly in the highly popular RX 450h+ plug-in hybrid guise.

What changed for 2024

  • •Minor trim updates and continuous 'Over The Air' software improvements.
  • •Increased availability of the highly demanded PHEV models.

Common MOT watch-outs

  • !Tyre wear on the large 21-inch alloy wheels.
  • !Minor sensor faults.
2
Known Issues
1
Serious
1
Moderate
0
Minor

All Known Issues

Rear Motor Cable Corrosion ("Cablegate")

SeriousElectrics & Electronics

The latest RX models continue to use an exposed high-voltage connector for the rear motor that can suffer from corrosion in harsh UK winters, potentially leading to expensive electrical repairs.

Est. Repair Cost: £3,000–£5,000
Warning Signs:

Hybrid System Malfunction warning, AWD system disabled, Corrosion visible on the motor connector housing

What to Inspect:
  • Confirm if the latest improved cable and protective cover have been fitted
  • Check for any history of hybrid system alerts
Verified by IsItAGoodCar Research Team

12V Battery Parasitic Drain

ModerateElectrics & Electronics

Similar to the NX, the latest RX can struggle to maintain 12V charge if the car is not used for several days.

Est. Repair Cost: £0 (Warranty / £150 AGM battery)
Warning Signs:

"Entry system failure" messages, Car won't start/dead battery, Settings resetting

What to Inspect:
  • Check the 12V battery health status
  • Ask if the owner has experienced any "dead car" scenarios
Verified by IsItAGoodCar Research Team

Buying Tips for 2024 Lexus RX (Mk5)

  • On the RX 450h+ PHEV, verify the charging cable is present and check the electric-only range estimation.
  • Test the 'e-Latch' door handles, ensuring they open smoothly and the safe exit assist function works correctly.
20232025–2026
Check a 2024 Lexus RX (Mk5) by Registration