BMW 730 (2021)
Running costs, common problems, and reliability data based on 243 real MOT tests in 2024.
MOT Pass Rate
98%
Total Tests (2024)
243
Avg Mileage
41,849 mi
Est. Annual Cost
£1,690
Is the 2021 BMW 730 reliable?
Excellent reliability. Very few MOT failures. That's 16 points above the national average of 82%. It also outperforms the BMW brand average of 88%.
At 3 years old, 98% of BMW 730s from 2021 passed their MOT first time in 2024. That's based on 243 tests across the UK. The average mileage at this age is 41,849 miles.
How does the 2021 BMW 730 compare?
Mileage Analysis
The average 2021 BMW 730 has 41,849 miles on the clock, which is well above the expected 22,200 miles for a 3-year-old car. Check service history carefully, as high-mileage cars need consistent maintenance to stay reliable.
How much does a 2021 BMW 730 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 730 by Year
| Year | Pass Rate | Tests | Avg Mileage |
|---|---|---|---|
| 2021 | 98% | 243 | 41,849 mi |
| 2020 | 95% | 1,033 | 41,493 mi |
| 2019 | 95% | 1,966 | 55,627 mi |
| 2018 | 95% | 1,592 | 67,232 mi |
| 2017 | 94% | 1,696 | 76,335 mi |
| 2016 | 91% | 2,288 | 88,853 mi |
| 2015 | 89% | 1,345 | 91,832 mi |
| 2014 | 89% | 1,656 | 97,859 mi |
| 2013 | 89% | 875 | 110,696 mi |
| 2012 | 88% | 1,119 | 115,118 mi |
| 2011 | 86% | 1,467 | 119,035 mi |
| 2010 | 89% | 991 | 128,302 mi |
| 2009 | 88% | 806 | 130,274 mi |
| 2008 | 82% | 1,043 | 138,734 mi |
| 2007 | 85% | 927 | 142,639 mi |
| 2006 | 81% | 1,315 | 141,407 mi |
| 2005 | 83% | 694 | 150,286 mi |
| 2004 | 83% | 322 | 132,666 mi |
| 2003 | 88% | 277 | 139,746 mi |
| 1995 | 70% | 96 | 129,643 mi |
| 1994 | 86% | 70 | 106,349 mi |
| 1993 | 68% | 37 | 128,018 mi |
| 1992 | 81% | 31 | 126,198 mi |
| 1991 | 76% | 34 | 141,732 mi |
| 1990 | 82% | 57 | 129,365 mi |
Checking a specific BMW 730?
Enter the reg plate to see its individual MOT history, mileage verification, and predicted costs.
About the 2021 BMW 730
The 2021 BMW 730 is a premium performance with a 2993cc diesel engine. 243 of these vehicles were MOT tested in 2024, making it a less common model in the UK market. It ranks in the top 6% of all 2021 cars for reliability.
With an average of 41,849 miles at 3 years old, BMW 730 owners cover more miles than the average driver. High-mileage examples should be checked carefully for wear on suspension, brakes, and drivetrain components.
2021 BMW 730 Fuel Costs
The 2993cc diesel engine is on the larger side, so fuel won't be this car's strong point. Expect around 40 mpg in mixed driving, which works out to roughly £1,245 per year at current diesel prices of 148p per litre (based on 7,400 miles per year).
What does it cost to own a 2021 BMW 730?
Total estimated annual running cost is £1,690 (£141/month), broken down as £1245 fuel, £190 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 98% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.
BMW 730 Reliability Trend
Newer BMW 730s show better MOT pass rates than older ones, with an average improvement of 8 percentage points.
Buying a Used 2021 BMW 730
At 3 years old, this is still relatively fresh. You may find examples with remaining manufacturer warranty. Depreciation is slowing but hasn't bottomed out yet.
Alternatives to the 2021 BMW 730
The BMW 730 is actually the most reliable option among similar diesel premium performances from this era. Here are comparable diesel cars with similar engines:
- MERCEDES E (2019) 90% pass rate (-8%) from 41,000 tests
- FORD RANGER (2019) 87% pass rate (-11%) from 32,194 tests
- AUDI Q5 (2019) 93% pass rate (-5%) from 24,241 tests
- AUDI A5 (2019) 90% pass rate (-8%) from 22,290 tests