Rear Brake Disc Corrosion
MinorBrakesRegenerative braking means the rear friction brakes do relatively little work on the IS 300h, so discs can corrode badly and fail MOT inspections despite otherwise easy lives.
Est. Repair Cost: £200–£400
Reliability GuideCommon Problems with the
Common Problems with the
2018 Lexus IS (XE30)
We've identified 3 known issues that can affect the 2018 Lexus IS (XE30). None are considered critical, but they're worth knowing about before you buy.
3
Known Issues
0
Serious
0
Moderate
3
Minor
All Known Issues
Remote Touch Controller and Infotainment Glitches
MinorElectrics & ElectronicsThe controller can lag, skip inputs or feel inconsistent, and some early systems also suffer from Bluetooth or screen glitches.
Est. Repair Cost: £200–£700
Weak 12V Battery Causing Hybrid Warnings
MinorElectrics & ElectronicsA tired auxiliary battery can trigger misleading warning messages, slow startup and odd behaviour even though the main hybrid system is healthy.
Est. Repair Cost: £150–£250
Buying Tips for 2018 Lexus IS (XE30)
- ✓Do not obsess over the hybrid battery first; service history, rear brake condition and general care are more important on most IS 300h cars.
- ✓Test the Remote Touch controller, Bluetooth and reversing camera properly because interface faults are frustrating and not cheap to sort.
- ✓On cars that do lots of short local trips, inspect the rear discs for pitting because regenerative braking leaves the friction brakes underused.