Lexus Rx MOT Failures
An analysis of 20,246 real DVSA MOT tests on the Lexus Rx — what fails, how often, and how that compares to every other car on UK roads.
Where the Lexus Rx fails its MOT
The single biggest MOT failure point on the Lexus Rx is headlight fault — this model is 14 times more likely to fail on this item than the average car on UK roads. That makes it worth watching for anyone buying or owning this model. Across 20,246 MOT tests, 0.54% of all Lexus Rx tests recorded this as a failure.
Lighting faults are usually straightforward to fix (bulbs, connectors, earth points) but can indicate deeper wiring issues on older cars. Check all lights including fog lamps, number plate lights, and dashboard warning lights.
Other notable weak points include suspension ball joints worn (8.3x the fleet average), tyre wear or damage (8.2x the fleet average), and suspension joint dust cover severely deteriorated (6.5x the fleet average). These ratios compare the Lexus Rx's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.
The failures span 3 categories: Lights & Electrics, Suspension, Tyres. If you're inspecting a Lexus Rx before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.
How failures change with mileage
The Lexus Rx's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.
Under 60,000 miles
At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.
For the Lexus Rx specifically, the DVSA data shows the most common failures at this mileage are suspension ball joints worn (8.3x the average) and suspension joint dust cover severely deteriorated (6.5x).
60,000 to 100,000 miles
This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.
The standout failure at this mileage is headlight fault at 14x the fleet average.
Over 100,000 miles
High-mileage cars accumulate failures across multiple systems. The key question isn't whether things will need doing — they will — but whether the car has been maintained well enough to keep on top of them. Look for a consistent service history and recent MOT passes with minimal advisories.
The standout failure at this mileage is tyre wear or damage at 8.2x the fleet average.
The shift from suspension ball joints worn at lower mileages to tyre wear or damage at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.
What to check before buying a Lexus Rx
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Lexus Rx:
Lights & Electrics — check for headlight fault. Suspension — check for suspension ball joints worn, suspension joint dust cover severely deteriorated. Tyres — check for tyre wear or damage.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. Enter any reg into our free car check to see the complete picture.
Looking at a specific Lexus Rx?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Lexus Rx MOT FAQs
What are the most common MOT failures on a Lexus Rx?
Based on 20,246 DVSA MOT tests, the most common failure is headlight fault — at 14x the national fleet average. Other frequent failures include suspension ball joints worn and tyre wear or damage.
Is the Lexus Rx reliable based on MOT data?
The Lexus Rx has 4 categories where it fails more often than average. The main concern is headlight fault. Always check a specific car's full history before buying.
What MOT failures should I expect at high mileage?
The most common high-mileage failures include headlight fault, suspension ball joints worn, tyre wear or damage.
How do I check a Lexus Rx's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.