1981 BMW M 535 I MOT Pass Rate
Pass rate for M 535 I models manufactured in 1981, based on 54 real MOT test results.
Data from official DVSA MOT testing records
1981 BMW M 535 I MOT Analysis
The 1981 BMW M 535 I has an MOT pass rate of 68.5% based on 54 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 116,432 miles on the odometer. With a 31.5% failure rate, the 1981 M 535 I is rated as "Good" for MOT reliability.
The leading cause of MOT failure for the 1981 BMW M 535 I is Brakes, responsible for 1.9% of failures. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs range from £150–400. Visibility is the second most common issue at 1.9%.
Top failures specific to 1981 models only. The overall M 535 I page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
View as table
| Rank | Failure Category | Rate (%) | Count |
|---|---|---|---|
| 1 | Brakes | 1.9% | 1 |
| 2 | Visibility | 1.9% | 1 |
Failures per 10,000 Miles
avg. 116,432 miFor every 10,000 miles driven, this shows what percentage of MOT tests fail for each category. This accounts for how far cars are actually driven, not just raw pass/fail counts.
View as table
| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Brakes | 0.16 | 1.9% | 1 |
| Visibility | 0.16 | 1.9% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1981 BMW M 535 I has an MOT pass rate of 68.5% based on 54 tests — slightly above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 116,432 miles on the odometer. With a 31.5% failure rate, the 1981 M 535 I is rated as "Good" for MOT reliability.
If you own or are considering buying a 1981 BMW M 535 I, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to brakes: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm). With an average mileage of 116,432 miles, these vehicles are in the higher-mileage bracket where wear-related failures become more common.
Brakes — 1.9% of failures
Brakes issues account for 1.9% of MOT failures on 1981 BMW M 535 I models. Brake-related failures include worn brake pads, corroded brake discs, leaking brake lines, and faulty brake servos. These are safety-critical components — any brake deficiency will result in an MOT fail. Typical repair costs: £150–400. Pre-MOT check: Listen for squealing or grinding noises. Check brake pedal feel — if it feels spongy or goes to the floor, have the system inspected immediately. Look at brake pad thickness through the wheel spokes (minimum 3mm).
Visibility — 1.9% of failures
Visibility issues account for 1.9% of MOT failures on 1981 BMW M 535 I models. Visibility failures relate to the windscreen, wipers, washers, mirrors, and view-obstructing damage. Cracks in the windscreen swept area, ineffective wipers, or empty washer bottles are common causes. Typical repair costs: £10–300. Pre-MOT check: Check the windscreen for chips and cracks — damage larger than 10mm in the driver's swept area or 40mm elsewhere will fail. Test washers and wipers. Ensure both door mirrors are intact and adjustable.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.