Lexus Is250 MOT Failures
An analysis of 90,981 real DVSA MOT tests on the Lexus Is250 — what fails, how often, and how that compares to every other car on UK roads. Generations covered: XE20 (2005–2013), XE30 (2013–2021).
Where the Lexus Is250 fails its MOT
The single biggest MOT failure point on the Lexus Is250 is reflector defective or damaged by up to 50% of ... — this model is 11 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 90,981 MOT tests, 1.08% of all Lexus Is250 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 emissions failure (14x the fleet average), headlight fault (10x the fleet average), abs fault (6.4x the fleet average), and brake lining or pad missing or incorrectly mounted (14x the fleet average). These ratios compare the Lexus Is250'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 5 categories: Lights & Electrics, Exhaust & Emissions, Brakes, Suspension, Tyres. If you're inspecting a Lexus Is250 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 Is250'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 Is250 specifically, the DVSA data shows the most common failures at this mileage are reflector defective or damaged by up to 50% of ... (11x the average) and headlight fault (10x). tyre valve seriously damaged or misaligned (7.8x) and tyres on the same axle or on twin wheels are di... (7.0x) also appear frequently.
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.
For the Lexus Is250 specifically, the DVSA data shows the most common failures at this mileage are emissions failure (14x the average) and reflector defective or damaged by up to 50% of ... (10x).
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 Is250 specifically, the DVSA data shows the most common failures at this mileage are brake lining or pad missing or incorrectly mounted (14x the average) and anti-roll bar links worn (13x). emissions failure (9.8x) and reflector defective or damaged by more than 50%... (9.3x) also appear frequently.
The shift from reflector defective or damaged by up to 50% of ... at lower mileages to brake lining or pad missing or incorrectly mounted 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 Is250 specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Emissions system failure leading to MOT failures Major
The direct injection system sprays fuel directly into the combustion chamber, bypassing the intake valves, so carbon deposits accumulate over time without the cleaning action of fuel. Affects XE20, XE30; typical independent garage repair cost is £200–£800.
Suspension component corrosion and wear Major
Suspension components including control arms, bushes, and associated hardware suffer from premature corrosion and wear on the IS250. Affects XE20, XE30; typical independent garage repair cost is £200–£600.
Electronic Stability Control system malfunction Major
The Electronic Stability Control system shows malfunction indicators at 6.4 times the fleet average rate, particularly affecting higher mileage vehicles. Affects XE20, XE30; typical independent garage repair cost is £150–£500.
Brake system lag and response issues Major
Abnormal brake lag affects the IS250 at The issue manifests as delayed brake response or uneven braking between wheels, which can cause the car to pull to one side under braking. Affects XE20, XE30; typical independent garage repair cost is £150–£400.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Lexus Is250 common problems breakdown.
What to check before buying a Lexus Is250
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Lexus Is250:
Lights & Electrics — check for reflector defective or damaged by up to 50% of ..., headlight fault, reflector defective or damaged by more than 50%.... Exhaust & Emissions — check for emissions failure. Brakes — check for abs fault, brake lining or pad missing or incorrectly mounted.
Beyond the MOT items, ask specifically about emissions system failure leading to mot failures and suspension component corrosion and wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £200. 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 Is250?
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Lexus Is250 MOT FAQs
What are the most common MOT failures on a Lexus Is250?
Based on 90,981 DVSA MOT tests, the most common failure is reflector defective or damaged by up to 50% of ... — at 11x the national fleet average. Other frequent failures include emissions failure and headlight fault.
Is the Lexus Is250 reliable based on MOT data?
The Lexus Is250 has 11 MOT failure categories above the fleet average. Specialists also flag emissions system failure leading to mot failures 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 Is250 most commonly fails on brake lining or pad missing or incorrectly mounted and anti-roll bar links worn. Under 60,000 miles, the main issues are reflector defective or damaged by up to 50% of ... and headlight fault.
How do I check a Lexus Is250'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.