Pass rate
97.3%
Above average — 2.5 pts ahead of the 94.8% that cars this age and mileage manage.
Across 148 recorded tests.
Typical repair bill £43–£96
2023 BMW M135I MOT pass rate
- 2023
- typical 17,871 mi
Most common fault
Tyres
60.0% of faults · 19.8% nationally
mostly tread below the limit, cuts and sidewall bulges.
Part only £55–£85 for Tyre has a tear. What fitting it takes →
Which year to buy
- Best 2023 97.3% pass · this year
- Avoid 2019 90.9% pass
Across the 5 years on record, a spread of 6.4 points. See every year →
- First-attempt pass
- 97.2%
- Typical mileage
- 18k mi
The 2023 BMW M135I MOT pass rate is 97.3% of its MOT tests — 2.5 points ahead of what its age and mileage predict. Tyres is the biggest single reason it fails, at 60.0% of what testers record.
Check your postcode
MOT pass rates are national — type your postcode to see how BMW M135I does in your corner of the country.
Expert verdict
Tyres: 3.0× the national share
Tyres make up 60.0% of everything recorded on the 2023 BMW M135i, against 19.8% nationally — 40.2 points above. Check all four tyres yourself, including the inner shoulders, and look at the date stamp — a tyre can pass on tread and still be six years old.
- When it fails, it costs. Only 11% of this model’s typical repairs come in under £30 in parts — the failures here tend to be the kind that need a garage rather than a bulb.
- Based on a small sample. 148 tests back this page. That is enough to publish and to index, not enough to treat the decimal places as precise — read the pattern, not the second digit.
Written from this page's own figures: fault shares against the national composition, the like-for-like pass rate, and the priced repair list. How these are worked out
Watching a BMW M135I? Get an email when these numbers change .
How does the 2023 BMW M135I compare?
Cars of this age and mileage average 94.8%, so this figure is 2.5 points ahead of what its age and mileage predict. On a first attempt, before any retests, the figure drops to 97.2%. The median 2023 BMW M135I in this dataset had covered 17,871 mi.
Pass rates also shift with the test month: tests recorded October–March passed 97.0% of the time, April–September 97.9%.
The single most recorded failure item is "Has a bulge, caused by separation or partial failure of its structure", noted on 1.35% of tests.
- 148 recorded tests behind this page.
- 97.3% overall pass rate, 97.2% on a first attempt.
- Across every year of the BMW M135I, the average is 91.8% — best year 2023 (97.3%), worst 2019 (90.9%).
Figures count every completed test on this vehicle-year in the dataset, including retests. See methodology for the exact definition.
This page's data
- Tests analysed
- 148
- Typical mileage (median)
- 17,871 mi
- Make and model
- BMW M135I
- Updated
- 2026-11-05
Source: DVSA anonymised MOT test data (2023–2025), OGL v3.0.
Top part to budget for
Tyres
Usually a DIY or independent-garage job.
Does mileage affect the M135I MOT pass rate?
Pass rate by odometer reading. Bar lengths start at 83% so small gaps stay visible.
Regional pass rates for the M135I
| Region | Tests | Pass rate |
|---|---|---|
| South East | 30 | 93.3% |
| Scotland | 20 | 100.0% |
| North West | 19 | 94.7% |
| Yorkshire | 19 | 94.7% |
| East of England | 18 | 100.0% |
Regions come from the postcode area recorded at the test station. Areas on region borders are assigned to the region with the majority of their population.
What fails a 2023 M135I
Everything a tester recorded on this vehicle, grouped into the inspection sections that produced it. The notch on each bar is the national share, so you can see at a glance whether this car is unusual or just ordinary.
A test can record several items, so these percentages do not add up to 100%. The exact strings, with prices, are in the full DVSA record at the bottom of this page.
Before your test
Three checks worth doing on a 2023 M135I
These are not generic tips — they are the faults recorded most often on this exact model, rewritten as things you can check yourself. All three take about ten minutes and cost nothing.
-
Check the lights 0.7% of tests
“headlamp aim too high”
Switch everything on and walk round the car: both headlamps on dip and main, every indicator, both brake lights, reverse, fog and the two number-plate lamps. A bulb is a few pounds and a five-minute job.
-
Check the tyre tread 0.7% of tests
“tread depth below requirements of 1.6mm”
Check all four tyres cold, including the inner shoulder where wear hides — 1.6mm across the central three-quarters is the legal limit, and most testers fail at 1.6mm without argument.
-
Check the wipers and washers 0.7% of tests
“washers jets misaligned and not providing sufficient fluid to the windscreen”
Run the wipers with the screen wet: they should clear it in one sweep without smearing or juddering. Top the washer bottle up and check both jets hit the screen.
Shares are the proportion of tests on this vehicle that recorded the item, so they overlap: one test can record several.
What it costs to get a 2023 M135I through its MOT
Across the 8 items that are recorded most often on this model, the average repair comes to £43–£96 — and 11% of those repairs are parts that cost under £30.
- Average repair across the 8 common items
- £43–£96
- Cheapest common item: washers jets misaligned
- £5–£15
- Dearest common item: windscreen damaged
- £80–£200
- Common items a careful owner can do at home
- 75%
- Repairs that still cost under £30
- 11%
Estimates from typical UK parts prices, weighted by how often each item appears in 148 MOT tests on this vehicle. They exclude diagnostics, retest fees and garage labour where the part is a DIY fit, and they are not figures from the DVSA dataset. Older and higher-mileage examples cost more than the average. How these estimates are built → · All MOT repair costs → · Cheapest cars to put through a test →
Every year of the M135I, side by side
5 model years on record, from 2019 to 2023. Across them the pass rate runs from 90.9% to 97.3% — a spread of 6.4 points. The bar under each year is the item that failed it most often.
- 2019 90.9% has a cut in excess of the…
- 2020 91.5% has a cut in excess of the…
- 2021 92.2% has a cut in excess of the…
- 2022 93.0% tread depth below requirements of…
- 2023 97.3%has a bulge, caused by separation…
Colour is the pass rate on a fixed scale, so a block means the same thing on any model. Each year links to its own page with the full fault breakdown.
Compare the 2023 BMW M135I with another year
The raw pass rate mostly measures age. The year comparison adds the like-for-like figure, the mileage bands and the repair bill.
Other 2023 cars with a similar record
- Levc Tx 97.0%
- Mercedes-Benz Eqe 96.5%
- Ford Puma 96.5%
- Toyota Corolla 95.7%
- Kia Niro 95.5%
- Polestar Polestar 94.6%
Closest pass rates among 2023 cars with at least 2,000 tests, so a small sample cannot flatter itself into the list. See the full rankings: best and worst MOT pass rates.
The full DVSA record for the 2023 BMW M135I 8 failure items · 5 advisories · 5 inspection categories · mileage brackets · all of it in the page, none of it above the fold
Every inspection category
Shares of the 25 individual items recorded on this vehicle, and the same share across all cars nationally. A single test can record several items, so a row is not a percentage of tests.
| Category | Items | This car | Nationally | Difference |
|---|---|---|---|---|
| Tyres | 15 | 60.00% | 19.76% | +40.24 |
| Brakes | 4 | 16.00% | 20.89% | −4.89 |
| Non-component advisories | 3 | 12.00% | 4.18% | +7.82 |
| Visibility | 2 | 8.00% | 4.97% | +3.03 |
| Lamps, reflectors and electrical equipment | 1 | 4.00% | 12.21% | −8.21 |
The exact failure items, in the tester's words
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Has a bulge, caused by separation or partial failure of its structure Tyres | Major | 1.4% | £45–95 |
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Major | 0.68% | £45–95 |
| Has a lump, caused by separation or partial failure of its structure Tyres | Major | 0.68% | £45–95 |
| Has a tear, caused by separation or partial failure of its structure Tyres | Major | 0.68% | £45–95 |
| Headlamp aim too high Lamps, reflectors and electrical equipment | Rectified | 0.68% | £30–80 |
| Tread depth below requirements of 1.6mm Tyres | Major | 0.68% | £45–95 |
| Washers jets misaligned and not providing sufficient fluid to the windscreen Visibility | Rectified | 0.68% | £5–15 |
| Windscreen damaged but not adversely affecting driver's view Visibility | Minor | 0.68% | £80–200 |
Severity is as recorded: Major and Dangerous fail the test outright; Minor and Advisory do not. Costs are estimates from typical UK parts prices — see how they are built.
What testers noted without failing the car
Advisories are the early warnings — the same parts a year or two before they fail. Reading them is how you tell a car that has been maintained from one that has been patched.
| Recorded item | Severity | Tests | Est. cost |
|---|---|---|---|
| Tread depth below requirements of 1.6mm Tyres | Advisory | 5.4% | £45–95 |
| Brake pads less than 1.5 mm thick Brakes | Advisory | 2.0% | £18–45 |
| Non-component advisories Nail in tyre Non-component advisories | Advisory | 2.0% | £45–95 |
| Has a cut in excess of the requirements deep enough to reach the ply or cords Tyres | Advisory | 0.68% | £45–95 |
| Service brake performance excessively fluctuating Brakes | Advisory | 0.68% | £60–150 |
Pass rate by mileage
| Mileage | Tests | Pass rate | Median odometer |
|---|---|---|---|
| 0-30k | 135 | 97.8% | 16,929 mi |
| 30-60k | 12 | 91.7% | 35,339 mi |
| 60-90k | 1 | 100.0% | 83,121 mi |
Source: 148 recorded tests on this vehicle-year. Every row above is recomputed from the same DVSA extract as the rest of the page — see the methodology.
2023 M135I MOT questions
What is the MOT pass rate for a 2023 BMW M135I?
97.3% of the 148 2023 BMW M135I tests in this dataset passed, against a national average of 94.8% for cars first used in 2023. First-attempt pass rate: 97.2%.
What are the most common MOT failures on a 2023 BMW M135I?
The three most recorded items are has a bulge, caused by separation or partial failure of its structure (1.35%), has a cut in excess of the requirements deep enough to reach the ply or cords (0.68%), has a lump, caused by separation or partial failure of its structure (0.68%). Percentages are the share of tests on this vehicle that recorded the item.
Does mileage affect the 2023 BMW M135I MOT pass rate?
Yes. Cars under 30,000 miles passed 97.8% of the time, falling to 100.0% for those over 120,000 miles. The median 2023 BMW M135I in this dataset had covered 17,871 mi.
Does the season affect the 2023 BMW M135I MOT pass rate?
Tests recorded in the winter months (October–March) passed 97.0% of the time; summer months (April–September) passed 97.9%. Brakes, tyres and lights are tested harder in bad weather, but the difference is small on most models.