Common Lexus Problems
Lexus consistently tops reliability surveys in the UK. Their hybrid powertrains are exceptionally robust, though they have specific maintenance needs like EGR cleaning, hybrid battery cooling filter checks, and 12V auxiliary battery management to ensure long-term durability.
Common Lexus trouble spots
- •CT 200h and early IS models can suffer from EGR (Exhaust Gas Recirculation) clogging, leading to engine knocking and head gasket failure.
- •Older RX, GS, and LS models may experience brake actuator failure, which is a very expensive repair (often over £2,000).
- •Modern models (UX, NX Mk2, RX Mk5) are prone to 12V auxiliary battery drain, which can leave the car unable to start after just a few days of inactivity.
- •Infotainment systems on 2014–2019 models using the "Remote Touch" interface are often criticized for being difficult to use and prone to hardware glitches.
What to check on used Lexuss
- ✓Take advantage of the "Lexus Relax" warranty, which provides up to 10 years or 100,000 miles of cover if the car is serviced within the Lexus network.
- ✓On hybrid models, check the hybrid battery air intake filter (usually located near the rear seats). If it's clogged with dust or pet hair, the battery can overheat.
- ✓Inspect the rear brake discs; because hybrids use regenerative braking, the mechanical rear brakes are often underused and can pit and corrode in the damp UK climate.
- ✓For newer models (post-2019), consider a trickle charger or high-quality 12V battery if the car is not driven daily, as parasitic drain is a known issue.
Select a Lexus Model
Lexus RZ
The RZ is Lexus's first dedicated electric SUV. It is quiet and beautifully built, but its real-world range is a frequent topic of discussion among UK owners.
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.
Lexus NX (Mk2)
The second-generation NX introduced a much-needed interior tech overhaul and the brand's first plug-in hybrid (450h+). While it feels more premium, it has faced early software and 12V battery teething issues.
Lexus UX
The smallest Lexus SUV is essentially a premium alternative to the Toyota C-HR. It is mechanically bulletproof but suffers from "flat battery" syndrome and has a very small boot.
Lexus ES
The ES replaced the GS in the UK as the brand's mid-size executive saloon. It is exceptionally comfortable and efficient, but inherits some common modern Lexus electronic quirks.
Lexus LS (Mk5)
The fifth-generation LS moved to a more dramatic design and a V6 twin-turbo or hybrid powertrain. It is generally very reliable, but suffers from modern electronic parasitic drain issues.
Lexus RX (AL20)
The fourth-generation RX feels far more modern than the older car and is usually extremely dependable. The hybrid drivetrain is rarely the problem; most UK ownership issues are wear-related on a heavy luxury SUV or involve the electric tailgate and infotainment hardware.
Lexus NX
A popular mid-sized SUV. It is very well-built, with very few common mechanical failures reported in the UK market.
Lexus IS (XE30)
The XE30 IS, especially as an IS 300h, is one of the most dependable compact executive cars you can buy in the UK. The hybrid system itself is rarely the problem; rear brakes, infotainment hardware and low-voltage battery health matter more in day-to-day ownership.
Lexus GS (Mk4)
The fourth-gen GS is more reliable than its predecessor, but it requires diligent maintenance of its hybrid cooling system and brakes.
Lexus CT 200h
A premium hybrid hatchback that shares its powertrain with the Toyota Prius. It is extremely reliable but requires specific attention to its EGR system as it ages.
Lexus RX (AL10)
The third-generation RX is one of the safest used luxury SUV buys in the UK, particularly as a 450h. Most cars wear their mileage well, but age-related braking and cooling-system bills are now the main things that separate a great example from an expensive one.
Lexus LS (Mk4)
The fourth-generation LS is a masterclass in refinement, but as it ages, the high-tech features that made it special (air suspension, hybrid systems) can become liability points.
Lexus IS (XE20)
The XE20 IS was the generation that made Lexus a genuine BMW 3 Series alternative in the UK. The IS 250 petrol is usually a very safe buy, but the IS 220d diesel has a much weaker reputation thanks to emissions and cooling-related trouble.
Lexus GS (Mk3)
The third-generation GS is a luxury powerhouse, especially in GS 450h hybrid form. However, at this age, expensive repairs to the braking and suspension systems are common.
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