Common Problems with the
2023 Lexus RZ

On AWD RZ 450e and related hybrid models, the high-voltage connector to the rear electric motor is exposed to road salt and moisture. Corrosion at the connector can trigger a 'Hybrid System Malfunction' warning, disable AWD functionality, and cause AM radio interference. Lexus has issued updated protective covers, but buyers must verify whether the revised shield has been fitted.

Even as a full EV, the RZ relies on a 12V auxiliary battery for its low-voltage systems. Constant parasitic draw from keyless entry receivers, telematics modules, and the infotainment standby circuit can flatten the battery in as little as 7–10 days of inactivity, preventing the car from entering READY mode and requiring an external jump start or battery replacement.

The RZ uses push-button electronic door releases (e-Latch) rather than mechanical pull handles. In damp UK conditions, moisture and road salt can affect the latch mechanism, causing slow opening, incomplete latching, or a failure to open from the outside. The buttons are also prone to unresponsive behaviour when wet or when the car’s low-voltage battery is weak.

The RZ’s lithium-ion battery performance degrades significantly in cold UK winters. Auto Express long-term testing recorded a drop from 205 miles in fair weather to around 186 miles in winter — 66 miles below the WLTP combined figure. Additionally, rapid DC charging speeds can fall well below the 150 kW peak if the battery is not preconditioned, extending journey times during winter road trips.

The 14-inch touchscreen and wireless Apple CarPlay/Android Auto integration on the RZ can suffer from random freezes, slow map loading, and Bluetooth audio dropouts. These issues are often resolved by dealer-applied over-the-air updates, but owners who miss updates or have poor mobile signal coverage may experience persistent glitches that require a system reboot.

The RZ’s fastback styling eliminates a rear windscreen wiper. In wet UK conditions, rain and road spray accumulate rapidly on the rear glass, severely reducing visibility through the interior mirror and making reversing in rain dangerous. The reversing camera helps, but it is no substitute for a clear rear window, particularly on dark winter evenings.