Lexus RX (Mk5)
The fifth-generation RX brought a radical "Spindle Body" design and new turbocharged hybrid options. It remains a reliability champion, though shares the 12V battery concerns of the NX.
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Common Faults & Reliability
These are the most common documented problems for the Lexus RX (Mk5), sorted by their typical impact and frequency.
Rear Motor Cable Corrosion ("Cablegate")
high severityThe 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.
12V Battery Parasitic Drain
medium severitySimilar to the NX, the latest RX can struggle to maintain 12V charge if the car is not used for several days.
CAN-Bus Security Vulnerability
high severityWhile 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.
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