BMW 645 Reliability, MOT Pass Rate & Common Faults
Free BMW 645 car check
Is the BMW 645 reliable? We analysed 67,788 real MOT tests across 4,007 vehicles to find out.
Got a specific BMW 645? Enter the reg for a free check:
The BMW 645 is above average for reliability based on real UK MOT data. Common problems include tyre tread depth below requirements of 1.6mm, tyre has ply or cords exposed and tyre has a cut in excess of the requirements deep enough to reach the ply or cords. Here's everything you need to know before buying a used BMW 645.
BMW 645 Number Plates
Number plates registered to a BMW 645. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
BMW 645 MOT Pass Rate by Year
How likely is a BMW 645 to pass its MOT? Here's the pass rate for each registration year, newest first.
BMW 645 Problems — What Goes Wrong?
The most common reasons a BMW 645 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
BMW 645 Mileage — What's Normal?
How many miles does a typical BMW 645 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
BMW 645 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the BMW 645 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2011 | 420 | 79.5% | 31,916 | 49,748 | 75,698 |
| 2005 | 17,928 | 78.4% | 47,727 | 72,974 | 99,981 |
| 2004 | 48,293 | 78.3% | 50,273 | 76,236 | 103,244 |
| 2003 | 907 | 76.6% | 52,026 | 80,983 | 105,336 |
How Long Does a BMW 645 Last?
Based on 4,007 BMW 645 vehicles on UK roads.
BMW 645 Mileage Distribution
Total mileage recorded across all BMW 645 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 645
Based on MOT pass rates across all registration years with sufficient test data.
79.5% MOT pass rate from 420 tests
76.6% MOT pass rate from 907 tests
The best year to buy a used BMW 645 is 2011, which has the highest MOT pass rate at 79.5% across 420 tests. The 2003 model year has the lowest pass rate at 76.6% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the BMW 645 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| BMW 645 THIS CAR | 78.3% | 67,788 | 75,259 mi | 22 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 |
| Dodge Journey | 71.1% | 21,384 | 69,650 mi | 18 yrs |
Compared to the BMW 3 Series (75.1% pass rate) and the BMW 118 (81.5% pass rate), the BMW 645 sits in the middle of the pack on MOT reliability.
Found a BMW 645 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 645Should you buy a used BMW 645?
The BMW 645 has an overall MOT pass rate of 78.3% across 67,788 real MOT tests — comfortably above the UK average, which puts it among the more reliable models on UK roads.
The most common problems on the BMW 645 are tyre tread depth below requirements of 1.6mm (1,475 recorded failures), tyre has ply or cords exposed (1,417), and tyre has a cut in excess of the requirements deep enough to reach the ply or cords (903). These are the faults most likely to cause an MOT failure on this model, so check for them carefully on any test drive or pre-purchase inspection. Many are wear-and-tear items that can be budgeted for, but a car that's already failing on multiple fronts may signal neglected maintenance.
A typical BMW 645 owner drives around 4,673 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.
In terms of longevity, most BMW 645 models stay on UK roads for around 22 years — a strong showing that suggests solid build quality and readily available parts. If you're buying one that's already approaching that window, the data suggests it has plenty of life left provided it's been maintained.
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.