IsItAGoodCar

Common Problems with the
2022–2023 Lexus RX (Mk5)

We've identified 3 known issues that can affect the 2022–2023 Lexus RX (Mk5). 2 of these are serious faults that could be expensive to repair.

3
Known Issues
2
Serious
1
Moderate
0
Minor

The 2022–2023 period has 2 more issues than the Lexus RX (Mk5) average across all year periods.

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.

Most affected: RX 350h AWD, RX 450h+, RX 500h

Estimated cost: £3,000–£5,000Affects: 2022–2024Often appears around: Any

Typical symptoms

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

What to inspect before you buy

  • ✓Confirm if the latest improved cable and protective cover have been fitted
  • ✓Check for any history of hybrid system alerts

CAN-Bus Security Vulnerability

SeriousElectrics & Electronics

While improved over the previous generation, high-end SUVs like the RX are targets for CAN-bus injection theft in the UK. Lexus has released plates and software to mitigate this.

Estimated cost: Warranty / £150 for platesAffects: 2022–2023Often appears around: Any

Typical symptoms

  • •Car stolen without keys
  • •Headlight trim showing signs of tampering

What to inspect before you buy

  • ✓Check if the Lexus security update/plates have been fitted by a main dealer

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.

Estimated cost: WarrantyAffects: 2022–2024Often appears around: Any

Typical symptoms

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

What to inspect before you buy

  • ✓Check the 12V battery health status
  • ✓Ask if the owner has experienced any "dead car" scenarios

Buying Tips for the 2022 Lexus RX (Mk5)

  • ✓The RX 500h uses a different 6-speed automatic instead of an e-CVT; test it for smooth shifts under hard acceleration.
  • ✓Verify that any security software patches for CAN-bus theft have been applied by a Lexus dealer.
  • ✓Test the ambient lighting and infotainment profiles for stability.
2024 Lexus RX (Mk5)

Browse 2022–2023 Lexus RX (Mk5) in our Directory

View MOT history, registration data, and reliability scores for 2022–2023 Lexus RX (Mk5) vehicles.

View 2022–2023 Directory

Other Lexus RX (Mk5) Year Periods

2022–202320242025

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