BMW 840i M Sport Auto: MOT pass rate and reliability data

The BMW 840i M Sport Auto passes its MOT first time more often than the average UK car, by 9.2 percentage points. These figures come from the DVSA's full year of anonymised MOT results, covering 1,400 individual BMW 840i M Sport Auto tests. Nothing here is an estimate or a survey.

The numbers

What this means if you are buying one

A 85.9% first-time pass rate means roughly 14 in every 100 BMW 840i M Sport Autos presented for MOT fail on the first attempt. That is better than average, so a well-kept example is a reasonably safe used buy. The average BMW 840i M Sport Auto tested had covered 26,438 miles and was built around 2021.

What this means at salvage auction

Pass rate is a proxy for what a car costs to keep on the road. The BMW 840i M Sport Auto sits 9.2 points above the national average, ranked 1,175 of 2,005 models. On one bought as repairable salvage, the mechanical side is less likely to spring surprises, so your repair estimate should hold up reasonably well.

Before you bid: run the lot through the analyzer, check the car's own record, check the mileage, decode the VIN, and if it carries a marker use the write-off value calculator. Or compare it against another model.

Looking at a specific BMW 840i M Sport Auto rather than the model in general? The free check covers its MOT and mileage history, and the full HPI report confirms the insurance write-off category, outstanding finance and whether it is recorded stolen, from licensed data for 5 credits. Already own one that has been damaged? Work out whether fixing it beats selling it with the repair or scrap calculator, and see recorded closing bids for damaged BMW 840i M Sport Autos at UK salvage auction.

Most common MOT failures on a BMW 840i M Sport Auto

1. A tyre has a lump, bulge or tear caused by separation or partial failure of its structure. This includes any lifting of the tread rubber, 1.1% of tests (5.9x the national rate for this defect)
2. A tyre cords visible or damaged, 5.6% of tests (3.32x the national rate for this defect)
3. A tyre seriously damaged, 8.6% of tests (3.07x the national rate for this defect)
4. Tyre tread depth not in accordance with the requirements, 0.7% of tests
5. Number plate does not conform to the specified requirements, 0.7% of tests (3.87x the national rate for this defect)
6. Any fracture or welding defect on a wheel, 0.5% of tests (8.5x the national rate for this defect)
7. A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 0.2% of tests
8. The aim of a headlamp is not within limits laid down in the requirements, 0.2% of tests
9. Wiper blade missing or obviously not clearing the windscreen, 0.2% of tests
10. Obligatory mirror or device inoperative, excessively damaged or insecure, 0.1% of tests (1.33x the national rate for this defect)

From 1,399 DVSA-tracked BMW 840i M Sport Auto tests, 2024. DVSA testers marked 23.45% of these flagged BMW 840i M Sport Auto defects as "dangerous", meaning the tester judged the car unsafe to drive away, against 5.11% nationally.

Most common MOT advisories on a BMW 840i M Sport Auto

An advisory doesn't fail the car - the tester flags it as worth watching, but it still passes. A different list from the failures above: what testers are noting on a BMW 840i M Sport Auto before it actually fails on it.

1. A wheel badly distorted or wear between wheel and hub at spigot mounting, 1.7% of tests (1.61x the national rate for this advisory)
2. Tyre tread depth not in accordance with the requirements, 19.7% of tests, also fails
3. A tyre seriously damaged, 10.3% of tests, also fails
4. A transmission shaft flexible coupling excessively deteriorated, 1% of tests (15.69x the national rate for this advisory)
5. a brake lining or pad worn below 1.5mm, 0.7% of tests
6. Brake disc or drum excessively weakened, insecure or fractured, 0.4% of tests
7. Number plate inscription missing or illegible, 0.3% of tests
8. Excessive fluctuation in brake effort through each wheel revolution., 0.2% of tests
9. Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle., 0.1% of tests
10. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 0.1% of tests

From 1,399 DVSA-tracked BMW 840i M Sport Auto tests, 2024.

Other BMW models

• BMW 3 Series - 76.8%
• BMW 118 - 81.9%
• BMW 116 - 78.6%
• BMW X1 - 85.2%
• BMW X3 - 82.3%
• BMW X5 - 81.2%
• BMW 1 Series - 81.6%
• BMW 520 - 80.2%

Models with a similar pass rate

• BMW 750 - 86%
• Mercedes-Benz V 220 Sport D Auto - 86%
• Hyundai Tucson N Line T-Gdi 2wd - 85.9%
• Ford Transit Custom 290 Sport Eblue - 85.9%
• Kia Sportage GT-Ln Crdi Mhev Sa - 85.9%
• Mitsubishi Outlander Design Cvt - 85.9%

If this car is a salvage or write-off

• What does Cat N mean? Category N explained
• What does Cat S mean? Category S explained
• Cat S vs Cat N: the real differences
• Do you need an HPI check on a car you know is a write-off?

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<a href="https://www.salvageprophet.co.uk/mot/bmw-840i-m-sport-auto"><img src="https://www.salvageprophet.co.uk/badge/failure/bmw-840i-m-sport-auto.svg" width="340" height="106" alt="BMW 840i M Sport Auto most common MOT failure: A tyre has a lump, bulge or tear caused by separation or partial failure of its structure. This includes any lifting of the tread rubber (1.1% of tests) - Salvage Prophet"></a>

All 2,005 models ranked by MOT pass rate