BMW 645 (2004)
Running costs, common problems, and reliability data based on 2,538 real MOT tests in 2024.
MOT Pass Rate
83%
Total Tests (2024)
2,538
Avg Mileage
105,730 mi
Est. Annual Cost
£2,247
Is the 2004 BMW 645 reliable?
Good reliability. Occasional issues but generally solid. That's close to the national average of 82%. It falls below the BMW brand average of 88%.
At 20 years old, 83% of BMW 645s from 2004 passed their MOT first time in 2024. That's based on 2,538 tests across the UK. The average mileage at this age is 105,730 miles.
How does the 2004 BMW 645 compare?
Mileage Analysis
The average 2004 BMW 645 has 105,730 miles on the clock, which is below the expected 148,000 miles for a 20-year-old car. This suggests lighter use than average, which generally means less wear on major components.
Best year to buy a BMW 645?
The most reliable year is the 2005 model with a 86% MOT pass rate, while the 2004 model has the lowest at 83%. Consider a different year if reliability is a priority.
How much does a 2004 BMW 645 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 645 by Year
Checking a specific BMW 645?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2004 BMW 645
The 2004 BMW 645 is a premium performance with a 4398cc petrol engine. 2,538 of these vehicles were MOT tested in 2024, making it a reasonably common sight on UK roads. It ranks in the top 18% of all 2004 cars for reliability.
With an average of 105,730 miles at 20 years old, BMW 645 owners tend to use this car less than the typical driver.
2004 BMW 645 Fuel Costs
The 4398cc 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 2004 BMW 645?
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 83% pass rate. Keeping on top of servicing will help avoid surprises.
BMW 645 Reliability Trend
The BMW 645 has maintained consistent MOT pass rates across model years, varying by only 3 percentage points.
Buying a Used 2004 BMW 645
At 20 years old, the BMW 645 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.
Alternatives to the 2004 BMW 645
The BMW 645 is actually the most reliable option among similar petrol premium performances from this era. Here are comparable petrol cars with similar engines:
- BMW X5 (2005) 77% pass rate (-6%) from 11,188 tests
- LAND ROVER RANGE ROVER (2006) 80% pass rate (-3%) from 8,231 tests
- LAND ROVER RANGE ROVER SPORT (2005) 82% pass rate (-1%) from 8,058 tests
- VOLVO XC90 (2006) 73% pass rate (-10%) from 5,088 tests