BMW 6 SERIES (1990)
Running costs, common problems, and reliability data based on 39 real MOT tests in 2024.
MOT Pass Rate
85%
Total Tests (2024)
39
Avg Mileage
122,050 mi
Est. Annual Cost
£2,247
Is the 1990 BMW 6 SERIES reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%.
At 34 years old, 85% of BMW 6 SERIESs from 1990 passed their MOT first time in 2024. That's based on 39 tests across the UK. The average mileage at this age is 122,050 miles.
How does the 1990 BMW 6 SERIES compare?
Mileage Analysis
The average 1990 BMW 6 SERIES has 122,050 miles on the clock, which is significantly below the expected 251,600 miles for a 34-year-old car. Low-mileage examples may have spent time sitting unused, so check for issues like corroded brakes or perished rubber seals.
Best year to buy a BMW 6 SERIES?
The most reliable year is the 2020 model with a 93% MOT pass rate, while the 2005 model has the lowest at 80%. The 1990 sits between the two at 85%.
How much does a 1990 BMW 6 SERIES 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 6 SERIES by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2020 | 93% | 662 | 38,758 mi |
| 2019 | 92% | 2,297 | 51,326 mi |
| 2018 | 91% | 3,656 | 56,355 mi |
| 2017 | 88% | 632 | 62,077 mi |
| 2014 | 86% | 66 | 87,054 mi |
| 2013 | 88% | 1,897 | 91,528 mi |
| 2012 | 89% | 1,275 | 95,998 mi |
| 2011 | 89% | 247 | 80,577 mi |
| 2010 | 82% | 127 | 105,279 mi |
| 2009 | 86% | 125 | 110,442 mi |
| 2008 | 80% | 171 | 117,234 mi |
| 2007 | 90% | 203 | 114,661 mi |
| 2006 | 82% | 288 | 121,301 mi |
| 2005 | 80% | 147 | 116,696 mi |
| 1990 | 85% | 39 | 122,050 mi |
Checking a specific BMW 6 SERIES?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 1990 BMW 6 SERIES
The 1990 BMW 6 SERIES is a premium performance with a 3453cc petrol engine. 39 of these vehicles were MOT tested in 2024, making it a rare model on UK roads. Among all cars from 1990, the average MOT pass rate is 79%, and this model beats that benchmark.
With an average of 122,050 miles at 34 years old, BMW 6 SERIES owners tend to use this car less than the typical driver. Very low mileage could mean the car has been garaged or used only for short trips, which can cause its own issues like battery drain and moisture buildup.
1990 BMW 6 SERIES Fuel Costs
The 3453cc petrol engine is on the larger side, so fuel won't be this car's strong point. Expect around 30 mpg in mixed driving, which works out to roughly £1,592 per year at current petrol prices of 142p per litre (based on 7,400 miles per year).
What does it cost to own a 1990 BMW 6 SERIES?
Total estimated annual running cost is £2,247 (£187/month), broken down as £1592 fuel, £250 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 85% pass rate. Keeping on top of servicing will help avoid surprises.
BMW 6 SERIES Reliability Trend
Newer BMW 6 SERIESs show better MOT pass rates than older ones, with an average improvement of 5 percentage points.
Buying a Used 1990 BMW 6 SERIES
At 34 years old, the BMW 6 SERIES 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 2020 model has the highest pass rate at 93%. Note: with only 39 tests in our data, these figures should be treated as indicative rather than definitive.
Alternatives to the 1990 BMW 6 SERIES
If reliability is your priority, there's one similar car with a higher MOT pass rate. Here are comparable petrol cars with similar engines:
- PORSCHE 911 (1990) 91% pass rate (+6%) from 1,888 tests
- MERCEDES 300 (1992) 83% pass rate (-2%) from 1,096 tests
- PORSCHE 944 (1990) 85% pass rate (same) from 914 tests
- LAND ROVER RANGE ROVER (1992) 85% pass rate (same) from 555 tests