BMW 540i — MOT pass rate & failures
The BMW 540i passed 80.4% of its 4,686 MOT tests, covering model years 1993–2022. That is 3.9 percentage points worse than the 15.7% fail rate across all BMW 5 Series versions, so the 540i is a weaker pick within the range. Failures concentrate in lighting & signalling, brakes and suspension.
What the MOT record shows
At component level the recurring items are headlamp aim, washers and catalyst emissions — headlamp aim alone was recorded 260 times.
Condition tracks the odometer closely. Failures run at 15.9% in the 0-30k band and 22.3% in the 150k+ band, a 6.4-point spread.
Advisories point at the next bill rather than this one: emissions & environmental was flagged on 26.7% of tests without failing them.
The trend is improving — the fail rate fell from 23.3% in 2021 to 18.3% in 2025, as the worst-kept examples leave the fleet.
How it compares
By model year
| Year | Tests | Pass rate | Fail rate |
|---|---|---|---|
| 1993 | 63 | 87.3% | 12.7% |
| 1994 | 81 | 72.8% | 27.2% |
| 1995 | 151 | 79.5% | 20.5% |
| 1996 | 219 | 79.9% | 20.1% |
| 1997 | 412 | 78.4% | 21.6% |
| 1998 | 562 | 77.6% | 22.4% |
| 1999 | 403 | 80.2% | 19.9% |
| 2000 | 426 | 80.3% | 19.7% |
| 2001 | 616 | 80.2% | 19.8% |
| 2002 | 537 | 81.0% | 19.0% |
| 2003 | 201 | 79.6% | 20.4% |
| 2005 | 45 | 75.6% | 24.4% |
| 2006 | 107 | 77.6% | 22.4% |
| 2007 | 80 | 83.8% | 16.3% |
| 2008 | 42 | 76.2% | 23.8% |
| 2017 | 163 | 84.0% | 16.0% |
| 2018 | 88 | 86.4% | 13.6% |
| 2019 | 56 | 87.5% | 12.5% |
| 2020 | 127 | 83.5% | 16.5% |
| 2021 | 187 | 84.0% | 16.0% |
| 2022 | 97 | 85.6% | 14.4% |
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 7.9% | 370 |
| 2 | Brakes | 7.6% | 358 |
| 3 | Suspension | 6.9% | 321 |
| 4 | Visibility | 5.0% | 234 |
| 5 | Tyres | 4.8% | 227 |
| 6 | Emissions & environmental | 3.4% | 158 |
| 7 | Seat belts & restraints | 2.7% | 126 |
| 8 | Body, structure & corrosion | 2.5% | 119 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 260 |
| 2 | Washers | 205 |
| 3 | Catalyst emissions | 183 |
| 4 | Rbt (sp) | 183 |
| 5 | Rigid brake pipes | 104 |
| 6 | Ball joint dust cover | 101 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Emissions & environmental | 26.7% | 1,252 |
| 2 | Brakes | 26.5% | 1,242 |
| 3 | Suspension | 22.6% | 1,058 |
| 4 | Tyres | 19.2% | 901 |
| 5 | Other defects | 9.3% | 438 |
| 6 | Body, structure & corrosion | 8.4% | 393 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 416 | 15.9% |
| 30-60k | 517 | 13.5% |
| 60-90k | 561 | 17.3% |
| 90-120k | 925 | 20.9% |
| 120-150k | 959 | 19.4% |
| 150k+ | 1,163 | 22.3% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 1,006 | 23.3% |
| 2022 | 899 | 19.6% |
| 2023 | 894 | 17.8% |
| 2024 | 933 | 18.8% |
| 2025 | 954 | 18.3% |
What to check before buying a BMW 540i
Focus on the areas it most often fails on — and remember MOT data covers testable defects only, not engine or gearbox health.
- Lighting & signalling (7.9% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (7.6% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
- Suspension (6.9% of tests): Worn drop links, bushes, springs or shocks — listen for knocks over bumps and check for uneven tyre wear. Typical repair: £150–£450 per corner.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How reliable is the BMW 540i at MOT time?
80.4% of the 4,686 BMW 540i MOT tests in this dataset passed — a 19.6% fail rate, worse than the 15.7% average across all 5 Series versions.
What is the most common MOT failure on a BMW 540i?
Lighting & signalling, recorded in 7.9% of tests, followed by brakes (7.6%).
Does the 540i get worse with mileage?
Its MOT fail rate rises from 15.9% in the 0-30k band to 22.3% in the 150k+ band.
Methodology & source. Based on 4,686 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-27. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.