2021 BMW 840i M Sport Auto MOT Pass Rate
Pass rate for 840i M Sport Auto models manufactured in 2021, based on 2,101 real MOT test results.
Data from official DVSA MOT testing records
This page shows all 840i M Sport Auto cars tested in 2021. Want to see how cars built in 2021 hold up over time?
View 2021 BMW 840i M Sport Auto vintage page → (91.2% current pass rate)2021 BMW 840i M Sport Auto MOT Analysis
The 2021 BMW 840i M Sport Auto has an MOT pass rate of 91.1% based on 2,101 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 25,729 miles on the odometer. With a 8.9% failure rate, the 2021 840i M Sport Auto is rated as "Excellent" for MOT reliability.
The leading cause of MOT failure for the 2021 BMW 840i M Sport Auto is Tyres, responsible for 11.6% of failures. 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 range from £50–200 per tyre. Lamps, reflectors and electrical equipment is the second most common issue at 1.4%. Road Wheels follows at 1.0%.
Top failures specific to 2021 models only. The overall 840i M Sport Auto 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 | Tyres | 11.6% | 243 |
| 2 | Lamps, Reflectors And Electrical Equipment | 1.4% | 30 |
| 3 | Road Wheels | 1.0% | 22 |
| 4 | Identification Of The Vehicle | 0.7% | 14 |
| 5 | Non-component Advisories | 0.5% | 10 |
| 6 | Visibility | 0.5% | 10 |
| 7 | Brakes | 0.3% | 6 |
| 8 | Body, Chassis, Structure | 0.2% | 4 |
| 9 | Suspension | 0.1% | 3 |
Failures per 10,000 Miles
avg. 25,729 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.
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| Category | Rate / 10K mi | Raw % | Count |
|---|---|---|---|
| Tyres | 4.50 | 11.6% | 243 |
| Lamps & Electrical | 0.55 | 1.4% | 30 |
| Wheels | 0.41 | 1.0% | 22 |
| Identification of the vehicle | 0.26 | 0.7% | 14 |
| Non-component advisories | 0.18 | 0.5% | 10 |
| Visibility | 0.18 | 0.5% | 10 |
| Brakes | 0.11 | 0.3% | 6 |
| Body & Structure | 0.07 | 0.2% | 4 |
| Suspension | 0.06 | 0.1% | 3 |
| Noise, emissions and leaks | 0.02 | 0.0% | 1 |
Mileage Statistics
Mileage-adjusted failure rate — accounts for how much this model year is typically driven.
About This Data
The 2021 BMW 840i M Sport Auto has an MOT pass rate of 91.1% based on 2,101 tests — well above the UK average for UK vehicles. Cars of this vintage present for MOT with an average of 25,729 miles on the odometer. With a 8.9% failure rate, the 2021 840i M Sport Auto is rated as "Excellent" for MOT reliability.
If you own or are considering buying a 2021 BMW 840i M Sport Auto, you can expect reliable MOT performance overall. Before your MOT, pay particular attention to tyres: 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. With relatively low average mileage of 25,729 miles, many of these vehicles are still in good mechanical condition.
Tyres — 11.6% of failures
Tyres issues account for 11.6% of MOT failures on 2021 BMW 840i M Sport Auto 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.
Lamps, reflectors and electrical equipment — 1.4% of failures
Lamps, reflectors and electrical equipment issues account for 1.4% of MOT failures on 2021 BMW 840i M Sport Auto models. Lighting failures cover all external lights: headlights, tail lights, brake lights, indicators, fog lights, and reflectors. A single blown bulb will cause an MOT fail. This is one of the most preventable failure categories. Typical repair costs: £5–50. Pre-MOT check: Walk around the car and check every light — headlights (dipped and main beam), side lights, tail lights, brake lights, indicators, hazard lights, reverse light, rear fog light, and number plate lights. Replace any blown bulbs before the test.
Road Wheels — 1.0% of failures
Road Wheels issues account for 1.0% of MOT failures on 2021 BMW 840i M Sport Auto models. Wheel failures include cracked or severely corroded alloy wheels, missing or loose wheel nuts, and wheels that are insecurely attached. These are safety-critical and relatively rare compared to tyre failures. Typical repair costs: £100–400 per wheel. Pre-MOT check: Visually inspect wheels for cracks, especially around the spokes and rim. Check that all wheel nuts are present and tightened. Look for signs of impact damage on alloy wheels.
Based on DVSA anonymised MOT test data (2005–2024). Crown copyright, Open Government Licence v3.0.