Lexus Parts Guides
Part numbers, fitment and common faults for Lexus models — organised by model below.
The Small 12V Battery Can Strand You in a Genuinely Awkward Way on Hybrids
It's worth understanding a real quirk specific to hybrid Lexus models: unlike the large, sealed high-voltage drive battery (which has a genuinely excellent reliability record and rarely fails), the small 12V auxiliary battery that powers electronics and the keyless entry system can drain flat if the car sits unused for a few weeks — a documented, frequently reported complaint. Because this battery can't simply be jump-started the conventional way without risking damage to the hybrid electrical system, a flat 12V battery generally needs trickle-charging or dealer attention rather than a quick roadside fix. Several owners have reported the genuinely frustrating scenario of being locked out of their own car with the physical key inside, since keyless entry depends on this same battery — worth knowing if your Lexus sits parked for extended periods, since a battery conditioner/trickle charger is a cheap, sensible precaution that avoids this exact situation.
Keep the Hybrid Battery Cooling Filter Clean — The Same Tip Applies Here as on Toyota
As with Toyota's hybrid models (Lexus shares core hybrid engineering with its parent company), several Lexus hybrids draw cooling air for the high-voltage battery pack through an intake and filter, and if this clogs with dust or pet hair, the battery can overheat and trigger warning lights or reduced hybrid performance that looks more serious than it actually is. Cleaning or replacing this filter periodically — particularly if you have pets or drive in dusty conditions — is a simple, often-overlooked task that resolves a meaningful share of these warnings without any expensive repair.
Early NX 200t Turbo Petrol Had a Genuine, Now-Resolved Oil Consumption Issue
If you're looking at a 2015-2016 first-generation NX 200t specifically (the turbocharged 2.0-litre petrol variant, as distinct from the naturally-aspirated 300h hybrid), it's worth knowing this engine had a documented tendency toward excessive oil consumption and leaks, particularly from the rear main seal, on early production. Lexus addressed this with ECU software updates and revised piston rings — if you're considering a car from this specific window, confirming these updates have been applied is a sensible check. The naturally-aspirated hybrid 300h, by contrast, has been consistently rock-solid across the same generation, sharing its core hybrid system with Toyota's well-proven technology — the main complaint on these is occasional carbon build-up in the EGR system at higher mileages, a manageable cleaning job rather than a serious fault.
Overall Reliability Remains Genuinely Excellent
It's worth setting all of the above in context: Lexus has been named the second most reliable car brand in at least one major recent UK survey (behind only Toyota), and the RX specifically was named "most reliable luxury car" in What Car?'s 2025 survey with an excellent 97.9% score. The NX also scores consistently above average, with most reported issues being minor and resolved quickly by Lexus's well-regarded dealer network — several owners specifically praised prompt, no-cost fixes for hybrid warning light issues. Air suspension, where fitted to higher-spec RX models, is worth checking on a used car for leaks (a corner sitting low, or a compressor that runs frequently, are the tell-tale signs) — a repair generally in the £800-2,000 range depending on what's failed, but this is very much the exception on an otherwise strong reliability record rather being a defining weak point.
Find Your Part Fast
Each guide covers a specific part on a specific model, with fitment notes across generations, known failure symptoms, and honest advice on OEM versus aftermarket options.
Lexus NX
- Lexus NX Brake Pads Guide
- Lexus NX Brake Discs Guide
- Lexus NX Battery Guide
- Lexus NX Alternator Guide
- Lexus NX Radiator Guide
- Lexus NX Exhaust System Guide
- Lexus NX Fuel Pump Guide
- Lexus NX Tail Lights Guide
- Lexus NX Fog Lights Guide
- Lexus NX Grille Guide
- Lexus NX Front Bumper Guide
- Lexus NX Rear Bumper Guide
- Lexus NX Wing Mirror Guide
- Lexus NX Front Suspension Guide
- Lexus NX Rear Suspension Guide
- Lexus NX Timing Belt Guide
- Lexus NX Cabin Air Filter Guide
- Lexus NX Spark Plugs Guide
- Lexus NX Engine Mount Guide
Lexus RX
- Lexus RX Brake Pads Guide
- Lexus RX Brake Discs Guide
- Lexus RX Battery Guide
- Lexus RX Alternator Guide
- Lexus RX Radiator Guide
- Lexus RX Exhaust System Guide
- Lexus RX Fuel Pump Guide
- Lexus RX Tail Lights Guide
- Lexus RX Fog Lights Guide
- Lexus RX Grille Guide
- Lexus RX Front Bumper Guide
- Lexus RX Rear Bumper Guide
- Lexus RX Wing Mirror Guide
- Lexus RX Front Suspension Guide
- Lexus RX Rear Suspension Guide
- Lexus RX Timing Belt Guide
- Lexus RX Cabin Air Filter Guide
- Lexus RX Spark Plugs Guide
- Lexus RX Engine Mount Guide
Lexus IS
- Lexus IS Brake Pads Guide
- Lexus IS Brake Discs Guide
- Lexus IS Battery Guide
- Lexus IS Alternator Guide
- Lexus IS Radiator Guide
- Lexus IS Exhaust System Guide
- Lexus IS Fuel Pump Guide
- Lexus IS Tail Lights Guide
- Lexus IS Fog Lights Guide
- Lexus IS Grille Guide
- Lexus IS Front Bumper Guide
- Lexus IS Rear Bumper Guide
- Lexus IS Wing Mirror Guide
- Lexus IS Front Suspension Guide
- Lexus IS Rear Suspension Guide
- Lexus IS Timing Belt Guide
- Lexus IS Cabin Air Filter Guide
- Lexus IS Spark Plugs Guide
- Lexus IS Engine Mount Guide
Lexus CT200h
- Lexus CT200h Brake Pads Guide
- Lexus CT200h Brake Discs Guide
- Lexus CT200h Battery Guide
- Lexus CT200h Alternator Guide
- Lexus CT200h Radiator Guide
- Lexus CT200h Exhaust System Guide
- Lexus CT200h Fuel Pump Guide
- Lexus CT200h Tail Lights Guide
- Lexus CT200h Fog Lights Guide
- Lexus CT200h Grille Guide
- Lexus CT200h Front Bumper Guide
- Lexus CT200h Rear Bumper Guide
- Lexus CT200h Wing Mirror Guide
- Lexus CT200h Front Suspension Guide
- Lexus CT200h Rear Suspension Guide
- Lexus CT200h Timing Belt Guide
- Lexus CT200h Cabin Air Filter Guide
- Lexus CT200h Spark Plugs Guide
- Lexus CT200h Engine Mount Guide