BMW 840I Auto Reliability, MOT Pass Rate & Common Faults
Free BMW 840I Auto car check
Is the BMW 840I Auto reliable? We analysed 7,083 real MOT tests across 1,840 vehicles to find out.
Got a specific BMW 840I Auto? Enter the reg for a free check:
The BMW 840I Auto is above average for reliability based on real UK MOT data. Here's everything you need to know before buying a used BMW 840I Auto.
BMW 840I Auto Number Plates
Number plates registered to a BMW 840I Auto. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
BMW 840I Auto MOT Pass Rate by Year
How likely is a BMW 840I Auto to pass its MOT? Here's the pass rate for each registration year, newest first.
BMW 840I Auto Common Faults & Problems
These are the most common serious faults found on BMW 840I Auto models during MOT testing — flagged as dangerous or major failures that need immediate attention.
BMW 840I Auto Mileage — What's Normal?
How many miles does a typical BMW 840I Auto owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
BMW 840I Auto MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the BMW 840I Auto year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2021 | 400 | 85.8% | 18,392 | 26,534 | 38,047 |
| 2020 | 5,205 | 87.9% | 20,019 | 28,806 | 39,820 |
| 2019 | 1,314 | 86.3% | 20,155 | 29,429 | 41,995 |
How Long Does a BMW 840I Auto Last?
Based on 1,840 BMW 840I Auto vehicles on UK roads.
BMW 840I Auto Mileage Distribution
Total mileage recorded across all BMW 840I Auto MOT tests. If the car you're looking at is above the 75th percentile, it's done more miles than most.
Best Year to Buy a Used BMW 840I Auto
Based on MOT pass rates across all registration years with sufficient test data.
87.9% MOT pass rate from 5,205 tests
85.8% MOT pass rate from 400 tests
The best year to buy a used BMW 840I Auto is 2020, which has the highest MOT pass rate at 87.9% across 5,205 tests. The 2021 model year has the lowest pass rate at 85.8% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the BMW 840I Auto Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| BMW 840I Auto THIS CAR | 87.6% | 7,083 | 28,962 mi | — yrs |
| BMW 3 Series | 75.1% | 12,840,406 | 90,743 mi | 37 yrs |
| BMW 118 | 81.5% | 1,923,256 | 64,042 mi | 22 yrs |
| BMW X5 | 77% | 1,735,343 | 83,401 mi | 25 yrs |
| Ktm 690 | 87.4% | 8,005 | 7,263 mi | 18 yrs |
Compared to the BMW 3 Series (75.1% pass rate) and the BMW 118 (81.5% pass rate), the BMW 840I Auto outperforms both on MOT reliability.
Found a BMW 840I Auto you like?
Run a full vehicle history check on the specific car. See finance, stolen, write-off, mileage and MOT data for that exact vehicle.
Check a specific BMW 840I AutoShould you buy a used BMW 840I Auto?
The BMW 840I Auto has an overall MOT pass rate of 87.6% across 7,083 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
On the safety side, the most frequently flagged dangerous fault is tyre tread depth below requirements of 1.6mm. Dangerous faults cause an immediate MOT failure and mean the vehicle is not roadworthy until repaired. If you're viewing a BMW 840I Auto with an expired or recently passed MOT, ask the seller whether any dangerous faults were found and fixed during the last test.
A typical BMW 840I Auto owner drives around 6,722 miles per year. If the car you're looking at is significantly above this, expect more wear on suspension, brakes and tyres. If it's well below, the vehicle may have been sitting unused — check for perished rubber, corroded discs and stale fluids.
Before committing to a purchase, we recommend running a full vehicle history check on the specific car. This will reveal any outstanding finance, stolen markers, write-off history and mileage discrepancies that the seller may not disclose — and that the MOT data alone can't tell you.