Is the 2020 BMW M5 reliable?

Excellent reliability. Very few MOT failures. 100% of BMW M5s from 2020 passed their MOT first time in 2026, based on 35 tests. That's 18 points above the national average of 82%.

How much does a 2020 BMW M5 cost to run?

Estimated annual running cost is £2,042 (£170/month), including £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs.

What is the MOT pass rate for a 2020 BMW M5?

The 2020 BMW M5 has a 100% MOT pass rate based on 35 tests in 2026. This ranks 60 out of 2596 cars from 2020.

Which year BMW M5 is most reliable?

The 2012 BMW M5 has the highest MOT pass rate at 95%. The least reliable year is 2000 at 85%.

BMW M5 (2020)

Q: What is the average mileage for a 2020 BMW M5?

The average mileage for a 2020 BMW M5 is 34,728 miles, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.

Running costs, reliability data, and common problems from 35 real MOT tests.

Annual Cost

£2,042

£170/month

MOT Pass Rate

100%

Excellent

Road Tax

£195

Flat rate/year

Insurance

Grp 30-42

2998cc Petrol

Great Choice

100% pass rate, £2042/year to run. 18 points above average.

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Petrol2998cc6 years old35 tests35k miles avg

Annual Running Costs

Fuel (Petrol, 2998cc)

~30 mpg

£1,592

Road Tax

Flat rate (post-2017)

£195

MOT Test

£55

Predicted Repairs

Low estimate due to excellent reliability

£200

Total per year£2,042

Per month£170/mo

Per week£39/wk

Based on 7,400 miles/year (UK average), current fuel prices, and repair likelihood from MOT data. Insurance not included.

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Reliability Verdict

100% MOT pass rate(Excellent)

0%National avg: 82%100%

Excellent reliability. Very few MOT failures. That's 18 points above the national average of 82%. It also outperforms the BMW brand average of 88%.

At 6 years old, 100% of BMW M5s from 2020 passed their MOT first time in 2026. That's based on 35 tests across the UK. The average mileage at this age is 34,728 miles.

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How Does It Compare?

Rank among 2020 cars60th of 2,596(top 2%)

Rank among BMW models40th of 1,564(top 3%)

vs national average+18%(82% avg)

vs 2020 cars average+8%(92% avg)

vs BMW average+12%(88% avg)

Mileage Analysis

34,728

Average miles

44,400

Expected for age

The average 2020 BMW M5 has 34,728 miles on the clock, which is below the expected 44,400 miles for a 6-year-old car. This suggests lighter use than average, which generally means less wear on major components.

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Best Year to Buy?

The most reliable year is the 2012 model with a 95% MOT pass rate, while the 2000 model has the lowest at 85%. The 2020 sits between the two at 100%.

BMW M5 by Year

Year	Pass Rate	Tests	Avg Mileage
2021	100%	43	45,385 mi
2020	100%	35	34,728 mi
2019	95%	255	39,872 mi
2018	92%	50	45,133 mi
2017	100%	39	58,281 mi
2016	94%	1,332	59,490 mi
2015	94%	1,111	60,765 mi
2014	94%	1,304	62,382 mi
2013	91%	1,310	66,323 mi
2012	95%	815	76,211 mi
2011	95%	219	76,893 mi
2010	77%	35	77,493 mi
2009	97%	30	74,096 mi
2008	95%	229	81,787 mi
2007	95%	467	83,923 mi
2006	89%	466	84,560 mi
2005	91%	597	92,623 mi
2003	94%	62	121,472 mi
2002	90%	272	119,488 mi
2001	90%	435	117,951 mi
2000	85%	359	125,310 mi
1999	89%	229	124,156 mi
1995	100%	44	125,572 mi
1994	90%	50	115,651 mi
1993	90%	62	127,582 mi
1992	92%	48	150,004 mi
1991	91%	46	110,152 mi

Similar Cars to Consider

BMW 5 SERIES

2018 · 2998cc Petrol

£2,037/year

91%

-9%

LAND ROVER RANGE ROVER SPORT

2018 · 2995cc Petrol

£2,037/year

93%

-7%

BMW X3

2019 · 2998cc Petrol

£2,037/year

92%

-8%

MERCEDES GLC

2019 · 2996cc Petrol

£2,037/year

93%

-7%

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About the 2020 BMW M5

The 2020 BMW M5 is a premium performance with a 2998cc petrol engine. 35 of these vehicles were MOT tested in 2026, making it a rare model on UK roads. It ranks in the top 2% of all 2020 cars for reliability.

With an average of 34,728 miles at 6 years old, BMW M5 owners tend to use this car less than the typical driver.

2020 BMW M5 Fuel Costs

The 2998cc 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 2020 BMW M5?

Total estimated annual running cost is £2,042 (£170/month), broken down as £1592 fuel, £195 road tax, £55 MOT, and £200 predicted repairs. The low repair estimate reflects the excellent 100% pass rate. These cars rarely fail their MOT, so unexpected bills are less likely.

BMW M5 Reliability Trend

Newer BMW M5s show better MOT pass rates than older ones, with an average improvement of 4 percentage points.

Buying a Used 2020 BMW M5

At 6 years old, the BMW M5 offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost. If you're flexible on year, the 2012 model has the highest pass rate at 95%. Note: with only 35 tests in our data, these figures should be treated as indicative rather than definitive.

Common Issues to Watch For

Based on the 2020 BMW M5's fuel type, age, and engine size, these are the most likely problem areas to check.

Timing Chain / Belt

Watch out

At 6 years old, check whether the timing belt has been replaced (typically due every 5-7 years or 60,000-100,000 miles). A snapped belt can destroy the engine.

Oil Consumption

Low risk

Larger petrol engines can develop higher oil consumption as they age. Check the oil level and look for blue smoke from the exhaust.

Service History

Low risk

Always request a full service history. Regular servicing is the single best indicator of how well a car has been maintained, regardless of mileage.

Running Costs Compared

How the 2020 BMW M5 stacks up against similar cars for annual running costs, insurance, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Insurance	Total/yr
BMW M5(2020)	100%	£1592	£195	Grp 30-42	£2042
BMW 5 SERIES(2018)	91%	£1592	£190	Grp 30-42	£2037-£5
LAND ROVER RANGE ROVER SPORT(2018)	93%	£1592	£190	Grp 30-42	£2037-£5
BMW X3(2019)	92%	£1592	£190	Grp 30-42	£2037-£5
MERCEDES GLC(2019)	93%	£1592	£190	Grp 30-42	£2037-£5

Estimates based on 7,400 miles/year, current fuel prices, and MOT data. Insurance groups are indicative. Actual costs vary by driver, location, and usage.