MOT failure data · 2025
Lexus RX400H MOT problems
Across every Lexus RX400H that failed its 2025 MOT, the defect testers recorded most often was position lamp not working, on 7.9% of failure items. The broadest problem area was suspension at 28.72%. These are recorded defects across the model, not a diagnosis of any one car.
Most common Lexus RX400H MOT failures
| # | Recorded defect | Area | Share |
|---|---|---|---|
| 1 | Position lamp not working | Lamps, reflectors and electrical equipment | 7.9% |
| 2 | Pins and bushes pin or bush excessively worn | Suspension | 5.28% |
| 3 | Linkage ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt | Suspension | 4.47% |
| 4 | Ball joint dust cover ball joint dust cover no longer prevents the ingress of dirt | Suspension | 4.3% |
| 5 | Component mounting prescribed areas prescribed area excessively corroded significantly reducing structural strength | Suspension | 3.85% |
| 6 | Tread depth tread depth below requirements of 1.6mm | Tyres | 3.83% |
| 7 | Shock absorbers has a serious fluid leak | Suspension | 2.87% |
| 8 | Wipers does not clear the windscreen effectively | Visibility | 2.72% |
| 9 | Brake pads less than 1.5 mm thick | Brakes | 2.67% |
| 10 | Rbt (sp) efficiency below requirements | Brakes | 2.65% |
Shares are of all recorded failure items for this model, so they sum to less than 100% — a single failed test often records several defects, and the long tail below the top 10 is not shown.
What this means if you are buying one
Use it as a viewing checklist. If you are looking at a Lexus RX400H, these are the areas worth inspecting and worth asking about — and worth reading the car's own MOT history for, since a defect that keeps reappearing as an advisory is a better signal than any model-wide average.
The MOT record also has hard limits: it does not check the engine, clutch or gearbox, and it says nothing about outstanding finance, insurance write-off history, stolen markers or whether the mileage is genuine. Our used Lexus RX400H buying guide covers what to check beyond the MOT.
Checking a specific Lexus RX400H?
Enter its registration for finance, write-off, stolen, mileage and keeper history.
Other Lexus models
- Lexus NX MOT problems
- Lexus CT MOT problems
- Lexus RX MOT problems
- Lexus IS MOT problems
- Lexus IS250 MOT problems
- Lexus RX450H MOT problems
Lexus RX400H MOT FAQs
What does a Lexus RX400H most commonly fail its MOT on?
The single most recorded defect on Lexus RX400H cars failing their 2025 MOT was "position lamp not working", appearing on 7.9% of failure items.
Does this mean my Lexus RX400H will fail?
No. This is what testers recorded across every Lexus RX400H that failed in 2025. It shows where this model tends to need attention, not the condition of any individual car. The Lexus RX400H passed 76.68% of its initial tests.
How do I see a specific Lexus RX400H's MOT history?
Enter its registration on our free MOT history check to see that car's own test results, advisories and recorded mileages.
See also: Lexus RX400H MOT pass rate · used Lexus RX400H buying guide · free MOT history check
Defect counts from the DVSA MOT Anonymised test-item data for 2025 (class 4 initial tests, failure items only — advisories and minor defects excluded), licensed under the Open Government Licence v3.0.