BMW 520 Reliability, MOT Pass Rate & Common Faults
Free BMW 520 car check
Is the BMW 520 reliable? We analysed 1,661,806 real MOT tests across 152,584 vehicles to find out.
Got a specific BMW 520? Enter the reg for a free check:
The BMW 520 is above average for reliability based on real UK MOT data. Common problems include tyre tread depth below requirements of 1.6mm, parking brake: efficiency below requirements and brake pipe excessively corroded. Here's everything you need to know before buying a used BMW 520.
BMW 520 Number Plates
Number plates registered to a BMW 520. Click on any registration for full vehicle details — including MOT history, mileage records, previous owners and damage history.
BMW 520 MOT Pass Rate by Year
How likely is a BMW 520 to pass its MOT? Here's the pass rate for each registration year, newest first.
BMW 520 Problems — What Goes Wrong?
The most common reasons a BMW 520 fails its MOT, ranked by how often they occur. Check for these problems before you buy.
BMW 520 Common Faults & Problems
These are the most common serious faults found on BMW 520 models during MOT testing — flagged as dangerous or major failures that need immediate attention.
BMW 520 Mileage — What's Normal?
How many miles does a typical BMW 520 owner drive per year? Use this to check if a car you're looking at has suspiciously low or high mileage.
BMW 520 MOT Data by Registration Year
Full breakdown of pass rate and mileage for each year. Use this to compare the BMW 520 year you're looking at.
| Year | Tests | Pass Rate | Low Mi. | Typical Mi. | High Mi. |
|---|---|---|---|---|---|
| 2020 | 211 | 89.1% | 24,650 | 33,997 | 47,868 |
| 2019 | 622 | 89.5% | 28,350 | 43,279 | 62,122 |
| 2018 | 1,079 | 88.8% | 29,836 | 45,387 | 66,707 |
| 2017 | 11,613 | 87.9% | 40,286 | 59,488 | 83,258 |
| 2016 | 105,553 | 88.1% | 41,836 | 62,606 | 88,705 |
| 2015 | 124,776 | 87.3% | 47,639 | 71,270 | 100,228 |
| 2014 | 138,122 | 85.6% | 53,531 | 79,404 | 109,992 |
| 2013 | 88,819 | 83.7% | 56,292 | 83,406 | 114,931 |
| 2012 | 106,952 | 80.5% | 58,989 | 88,697 | 121,931 |
| 2011 | 157,173 | 79.8% | 67,716 | 98,041 | 130,943 |
| 2010 | 96,397 | 79.0% | 66,578 | 97,744 | 131,473 |
| 2009 | 105,070 | 78.9% | 67,454 | 100,384 | 135,666 |
| 2008 | 109,317 | 78.2% | 74,574 | 106,497 | 139,976 |
| 2007 | 121,076 | 76.2% | 75,421 | 110,264 | 146,687 |
| 2006 | 96,504 | 74.2% | 77,952 | 113,613 | 152,077 |
| 2005 | 33,769 | 73.9% | 76,665 | 112,763 | 151,626 |
| 2004 | 20,733 | 75.8% | 55,586 | 84,715 | 116,228 |
| 2003 | 35,008 | 74.5% | 56,639 | 84,985 | 114,687 |
| 2002 | 34,102 | 73.7% | 65,152 | 93,444 | 122,239 |
| 2001 | 35,872 | 72.5% | 72,778 | 98,478 | 125,183 |
How Long Does a BMW 520 Last?
Based on 152,584 BMW 520 vehicles on UK roads.
BMW 520 Mileage Distribution
Total mileage recorded across all BMW 520 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 520
Based on MOT pass rates across all registration years with sufficient test data.
89.5% MOT pass rate from 622 tests
65.4% MOT pass rate from 280 tests
The best year to buy a used BMW 520 is 2019, which has the highest MOT pass rate at 89.5% across 622 tests. The 1982 model year has the lowest pass rate at 65.4% — if you're looking at one from that year, budget for potential repairs and get a thorough pre-purchase inspection.
How Does the BMW 520 Compare?
MOT pass rates compared to similar models. Click any model for the full breakdown.
| Model | Pass Rate | Tests | Typical Mileage | Lifespan |
|---|---|---|---|---|
| BMW 520 THIS CAR | 78.5% | 1,661,806 | 95,792 mi | 35 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 |
| Skoda Felicia | 65.7% | 560,899 | 65,910 mi | 31 yrs |
Compared to the BMW 3 Series (75.1% pass rate) and the BMW 118 (81.5% pass rate), the BMW 520 sits in the middle of the pack on MOT reliability.
Found a BMW 520 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 520Should you buy a used BMW 520?
The BMW 520 has an overall MOT pass rate of 78.5% across 1,661,806 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 520 are tyre tread depth below requirements of 1.6mm (47,121 recorded failures), parking brake: efficiency below requirements (22,647), and brake pipe excessively corroded (16,724). 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.
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 520 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 520 owner drives around 7,968 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 520 models stay on UK roads for around 35 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.