Lexus Rx350 MOT Failures
An analysis of 3,481 real DVSA MOT tests on the Lexus Rx350 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: XU30 (2003–2009), AL10 (2009–2015).
Where the Lexus Rx350 fails its MOT
The single biggest MOT failure point on the Lexus Rx350 is subframe bushes or mounts worn — this model is 9.9 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 3,481 MOT tests, 2.87% of all Lexus Rx350 tests recorded this as a failure.
Suspension failures typically mean worn bushes, drop links, or dampers. These affect handling and tyre wear. Budget £150–£400 per corner at an independent garage for full suspension overhaul.
Other notable weak points include parking brake efficiency below minimum requirement (38x the fleet average), brake hoses perished or damaged (8.7x the fleet average), anti-roll bar links worn (6.2x the fleet average), and body, cab or chassis corroded at a mounting point (6.0x the fleet average). These ratios compare the Lexus Rx350'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 4 categories: Suspension, Brakes, Bodywork, Exhaust & Emissions. If you're inspecting a Lexus Rx350 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 Rx350'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.
The standout failure at this mileage is brake hoses perished or damaged at 8.7x the fleet average.
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 subframe bushes or mounts worn at 6.4x 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.
For the Lexus Rx350 specifically, the DVSA data shows the most common failures at this mileage are parking brake efficiency below minimum requirement (38x the average) and subframe bushes or mounts worn (9.9x). anti-roll bar links worn (6.2x) and body, cab or chassis corroded at a mounting point (6.0x) also appear frequently.
The shift from brake hoses perished or damaged at lower mileages to parking brake efficiency below minimum requirement 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.
Known issues beyond the MOT
An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that Lexus Rx350 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Parking brake efficiency failure Dangerous
The parking brake system on RX350 models shows abnormally high failure rates for efficiency below minimum requirements during MOT testing. Affects XU30, AL10; typical independent garage repair cost is £150–£400.
Brake system power assist failure Dangerous
NHTSA complaints report brake power assist failures where the brake pedal becomes extremely hard to press, requiring significantly more force to stop the vehicle. Affects XU30, AL10; typical independent garage repair cost is £400–£800.
Suspension component wear Major
RX350 models show significantly elevated failure rates for suspension pins, bushes and joints during MOT testing. Affects XU30, AL10; typical independent garage repair cost is £200–£800.
Engine malfunction indicator lamp Major
The RX350 shows elevated failure rates for engine management light illumination during MOT testing, peaking at 13.0 times the fleet average on higher mileage examples. Affects XU30, AL10; typical independent garage repair cost is £100–£800.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Lexus Rx350 common problems breakdown.
What to check before buying a Lexus Rx350
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Lexus Rx350:
Suspension — check for subframe bushes or mounts worn, anti-roll bar links worn. Brakes — check for parking brake efficiency below minimum requirement, brake hoses perished or damaged.
Beyond the MOT items, ask specifically about parking brake efficiency failure and brake system power assist failure. These won't show up on a standard MOT but can be expensive to fix — repairs start from £150. A specialist pre-purchase inspection is worth the investment on this model.
Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.
Looking at a specific Lexus Rx350?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Lexus Rx350 MOT FAQs
What are the most common MOT failures on a Lexus Rx350?
Based on 3,481 DVSA MOT tests, the most common failure is subframe bushes or mounts worn — at 10x the national fleet average. Other frequent failures include parking brake efficiency below minimum requirement and brake hoses perished or damaged.
Is the Lexus Rx350 reliable based on MOT data?
The Lexus Rx350 has 6 MOT failure categories above the fleet average. Specialists also flag parking brake efficiency failure as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Lexus Rx350 most commonly fails on parking brake efficiency below minimum requirement and subframe bushes or mounts worn. Under 60,000 miles, the main issues are brake hoses perished or damaged.
How do I check a Lexus Rx350'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.