1986 MG B MOT Pass Rate
Pass rate for B models manufactured in 1986, based on 34 real MOT test results.
Data from official DVSA MOT testing records
1986 MG B MOT Analysis
The 1986 MG B has an MOT pass rate of 70.6% based on 34 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 32,647 miles on the odometer. With a 29.4% failure rate, the 1986 B is rated as "Very Good" for MOT reliability.
The leading cause of MOT failure for the 1986 MG B is Brakes, responsible for 2.9% 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. Tyres is the second most common issue at 2.9%.
Top failures specific to 1986 models only. The overall B page may show different rankings.
What Fails Most
What Fails on This Car?
Click a category to see specific failure items.
Failures per 10,000 Miles
avg. 32,647 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 | 0.90 | 2.9% | 1 |
| Tyres | 0.90 | 2.9% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 1986 MG B has an MOT pass rate of 70.6% based on 34 tests — above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 32,647 miles on the odometer. With a 29.4% failure rate, the 1986 B is rated as "Very Good" for MOT reliability.
If you own or are considering buying a 1986 MG B, 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 relatively low average mileage of 32,647 miles, many of these vehicles are still in good mechanical condition.
Brakes — 2.9% of failures
Brakes issues account for 2.9% of MOT failures on 1986 MG B 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).
Tyres — 2.9% of failures
Tyres issues account for 2.9% of MOT failures on 1986 MG B models. Tyre failures include tread depth below the legal minimum of 1.6mm, cuts, bulges, exposed cords, and incorrect tyre pressure. Tyres are one of the most common and easiest-to-prevent MOT failures. Typical repair costs: £50–200 per tyre. Pre-MOT check: Check tread depth with a 20p coin — if the outer band is visible, the tyre is too worn. Look for bulges, cuts, or embedded objects. Ensure all tyres match the recommended size and load rating.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.