BMW 520 (2003)
Running costs, common problems, and reliability data based on 752 real MOT tests in 2024.
MOT Pass Rate
75%
Total Tests (2024)
752
Avg Mileage
112,691 mi
Est. Annual Cost
£1,727
Is the 2003 BMW 520 reliable?
Average reliability. Expect some repairs as it ages. That's 7 points below the national average of 82%. It falls below the BMW brand average of 88%.
At 21 years old, 75% of BMW 520s from 2003 passed their MOT first time in 2024. That's based on 752 tests across the UK. The average mileage at this age is 112,691 miles.
How does the 2003 BMW 520 compare?
Mileage Analysis
The average 2003 BMW 520 has 112,691 miles on the clock, which is below the expected 155,400 miles for a 21-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a BMW 520?
The most reliable year is the 2021 model with a 97% MOT pass rate, while the 1996 model has the lowest at 64%. The 2003 sits between the two at 75%.
How much does a 2003 BMW 520 cost to run?
Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT pass rate data. Insurance not included.
BMW 520 by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 97% | 61 | 21,198 mi |
| 2020 | 91% | 153 | 37,784 mi |
| 2019 | 93% | 260 | 53,629 mi |
| 2018 | 89% | 408 | 59,377 mi |
| 2017 | 90% | 3,033 | 78,699 mi |
| 2016 | 90% | 21,858 | 88,137 mi |
| 2015 | 89% | 22,398 | 100,237 mi |
| 2014 | 87% | 22,280 | 111,440 mi |
| 2013 | 86% | 13,541 | 117,221 mi |
| 2012 | 84% | 13,792 | 126,086 mi |
| 2011 | 82% | 15,882 | 135,205 mi |
| 2010 | 82% | 8,647 | 137,583 mi |
| 2009 | 81% | 8,080 | 144,392 mi |
| 2008 | 80% | 5,590 | 153,055 mi |
| 2007 | 79% | 6,483 | 162,310 mi |
| 2006 | 77% | 4,128 | 171,451 mi |
| 2005 | 72% | 1,137 | 170,402 mi |
| 2004 | 78% | 502 | 123,517 mi |
| 2003 | 75% | 752 | 112,691 mi |
| 2002 | 74% | 599 | 119,674 mi |
| 2001 | 75% | 416 | 118,034 mi |
| 2000 | 78% | 219 | 119,331 mi |
| 1999 | 78% | 368 | 129,821 mi |
| 1998 | 65% | 366 | 131,359 mi |
| 1997 | 69% | 183 | 116,662 mi |
| 1996 | 64% | 114 | 118,652 mi |
| 1995 | 75% | 336 | 123,709 mi |
| 1994 | 78% | 201 | 118,772 mi |
| 1993 | 74% | 138 | 111,214 mi |
| 1992 | 71% | 99 | 101,159 mi |
| 1991 | 79% | 52 | 120,049 mi |
Checking a specific BMW 520?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2003 BMW 520
The 2003 BMW 520 is a premium with a 1995cc diesel engine. 752 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. Among all cars from 2003, the average MOT pass rate is 72%, and this model beats that benchmark.
With an average of 112,691 miles at 21 years old, BMW 520 owners tend to use this car less than the typical driver.
2003 BMW 520 Fuel Costs
The 1995cc diesel engine offers a reasonable balance between performance and economy. Expect around 48 mpg in mixed driving, which works out to roughly £1,037 per year at current diesel prices of 148p per litre (based on 7,400 miles per year). Diesel cars of this age should have their DPF (diesel particulate filter) checked, as replacements can be costly.
What does it cost to own a 2003 BMW 520?
Total estimated annual running cost is £1,727 (£144/month), broken down as £1037 fuel, £135 road tax, £55 MOT, and £500 predicted repairs. Repair costs are moderate, reflecting the 75% pass rate. Keeping on top of servicing will help avoid surprises.
BMW 520 Reliability Trend
Newer BMW 520s show better MOT pass rates than older ones, with an average improvement of 12 percentage points.
Buying a Used 2003 BMW 520
At 21 years old, the BMW 520 is firmly in budget territory. Purchase prices are low, but check for rust, worn suspension bushes, and electrical gremlins. A full service history is especially valuable at this age. If you're flexible on year, the 2021 model has the highest pass rate at 97%.
Alternatives to the 2003 BMW 520
The BMW 520 is actually the most reliable option among similar diesel premiums from this era. Here are comparable diesel cars with similar engines:
- VOLKSWAGEN GOLF (2005) 72% pass rate (-3%) from 41,401 tests
- VAUXHALL ASTRA (2005) 69% pass rate (-6%) from 29,377 tests
- HONDA CIVIC (2005) 73% pass rate (-2%) from 24,685 tests
- VOLKSWAGEN TRANSPORTER (2005) 72% pass rate (-3%) from 20,813 tests