BMW 123d — MOT pass rate & failures
The BMW 123d passed 79.3% of its 21,571 MOT tests, covering model years 2007–2018. That is 4.7 percentage points worse than the 16.0% fail rate across all BMW 1 Series versions, so the 123d is a weaker pick within the range. Failures concentrate in lighting & signalling, suspension and tyres.
What the MOT record shows
At component level the recurring items are shock absorbers, headlamp aim and tread depth — shock absorbers alone was recorded 1,349 times.
A 150k+ example is materially riskier than a 0-30k one: 23.0% versus 10.0%.
Advisories point at the next bill rather than this one: brakes was flagged on 30.1% of tests without failing them.
The trend is worsening — 19.1% of tests failed in 2021 against 21.2% in 2025, the usual pattern as a fleet ages.
How it compares
By model year
| Year | Tests | Pass rate | Fail rate |
|---|---|---|---|
| 2007 | 1,288 | 80.1% | 19.9% |
| 2008 | 7,754 | 78.5% | 21.5% |
| 2009 | 5,072 | 78.8% | 21.2% |
| 2010 | 3,585 | 80.5% | 19.5% |
| 2011 | 2,735 | 81.2% | 18.8% |
| 2012 | 909 | 78.2% | 21.8% |
| 2013 | 226 | 77.9% | 22.1% |
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Lighting & signalling | 9.3% | 2,002 |
| 2 | Suspension | 9.0% | 1,944 |
| 3 | Tyres | 7.4% | 1,592 |
| 4 | Brakes | 6.0% | 1,289 |
| 5 | Visibility | 4.2% | 915 |
| 6 | Emissions & environmental | 2.1% | 451 |
| 7 | Body, structure & corrosion | 1.3% | 276 |
| 8 | Road wheels | 1.0% | 210 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Shock absorbers | 1,349 |
| 2 | Headlamp aim | 1,208 |
| 3 | Tread depth | 1,019 |
| 4 | Washers | 665 |
| 5 | Pins and bushes | 616 |
| 6 | Headlamp | 567 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Brakes | 30.1% | 6,494 |
| 2 | Tyres | 28.0% | 6,034 |
| 3 | Suspension | 27.8% | 5,999 |
| 4 | Emissions & environmental | 8.9% | 1,922 |
| 5 | Lighting & signalling | 7.5% | 1,621 |
| 6 | Other defects | 7.1% | 1,534 |
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 | 130 | 10.0% |
| 30-60k | 1,175 | 12.1% |
| 60-90k | 3,794 | 17.6% |
| 90-120k | 6,855 | 21.2% |
| 120-150k | 5,989 | 22.5% |
| 150k+ | 3,621 | 23.0% |
Failure rate by age
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2021 | 4,836 | 19.1% |
| 2022 | 4,731 | 21.0% |
| 2023 | 4,395 | 20.9% |
| 2024 | 4,025 | 21.5% |
| 2025 | 3,584 | 21.2% |
What to check before buying a BMW 123d
Focus on the areas it most often fails on — and remember MOT data covers testable defects only, not engine or gearbox health.
- Lighting & signalling (9.3% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Suspension (9.0% 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.
- Tyres (7.4% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
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 123d at MOT time?
79.3% of the 21,571 BMW 123d MOT tests in this dataset passed — a 20.7% fail rate, worse than the 16.0% average across all 1 Series versions.
What is the most common MOT failure on a BMW 123d?
Lighting & signalling, recorded in 9.3% of tests, followed by suspension (9.0%).
Does the 123d get worse with mileage?
Its MOT fail rate rises from 10.0% in the 0-30k band to 23.0% in the 150k+ band.
Methodology & source. Based on 21,571 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.