BMW 318D M Sport MHEV Auto (2021)

Estimated running costs and MOT pass rates from 811 MOT tests in 2024.

Annual Cost

£2,002

£167/month

MOT Pass Rate

88%

Good

Road Tax

£200

Standard rate/year

Est. Insurance

Grp 18-32

1995cc Diesel hybrid

Solid Option

88% pass rate, £2,002/year to run. 6 points above average.

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Diesel hybrid1995cc5 years old811 tests37k miles avg

Annual Running Costs

Fuel (Diesel hybrid, 1995cc)

~48 mpg (diesel-engine estimate; hybrids usually use less)

£1,397

Road Tax

Standard rate (from April 2017)

£200

MOT Test

£55

Predicted Repairs

£350

Total per year£2,002

Per month£167/mo

Per week£39/wk

Estimates based on 7,400 miles/year (UK average), diesel at 199.33p a litre (GOV.UK weekly average, week of 19 October 2026), GOV.UK road tax rates and repair likelihood from MOT data. Insurance not included. Cars registered from April 2017 pay the £200 standard rate, plus £440 a year for five years (from the second year) if they cost over £40,000 new (over £50,000 for electric cars).

Reliability Verdict

88% MOT pass rate(Good)

0%All-model avg: 82%100%

Good reliability. Occasional issues but generally solid. That's 6 points above the average of 82% across all models in our data.

88% of MOT tests on BMW 318D M Sport MHEV Autos from 2021 ended in a pass in 2024, when they were about 3 years old. That's based on 811 tests across the UK, retests included. The average mileage recorded at those tests was 37,259 miles.

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How Does It Compare?

Rank among 2021 models2795th of 3,336(bottom 17%)

Rank among BMW models912th of 1,548(bottom half)

vs average of all models+6%(82% avg)

vs 2021 models average-4%(92% avg)

vs BMW average+0%(88% avg)

Mileage Analysis

37,259

Average miles

22,200

Expected for age

The average 2021 BMW 318D M Sport MHEV Auto had 37,259 miles on the clock at its 2024 MOT, 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.

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Best Year to Buy?

Of the years with at least 100 tests, the 2020 model has the highest MOT pass rate at 90%, while the 2021 model has the lowest at 88%. Consider a different year if reliability is a priority. Newer cars usually pass more often simply because they are younger, so compare years of a similar age.

BMW 318D M Sport MHEV Auto by Year

Year	Pass Rate	Tests	Avg Mileage
2022	96%	49	36,608 mi
2021	88%	811	37,259 mi
2020	90%	174	40,190 mi

Similar Cars to Consider

Land Rover Discovery Sport R-DYN SE D A

2020 · 1999cc Diesel hybrid

£1,852/year

90%

+2%

BMW 520D M Sport MHEV Auto

2021 · 1995cc Diesel hybrid

£2,002/year

89%

+1%

BMW 320D M Sport MHEV Auto

2021 · 1995cc Diesel hybrid

£1,852/year

91%

+3%

Volvo XC90 R-Design B5 MHEV Awd Auto

2021 · 1969cc Diesel hybrid

£1,852/year

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+2%

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About the 2021 BMW 318D M Sport MHEV Auto

The 2021 BMW 318D M Sport MHEV Auto is a premium car. Our records list a 1995cc diesel hybrid engine, though engines vary between versions. 811 MOT tests were recorded on this model in 2024, making it a less common model in the UK market. It sits in the bottom 17% of 2021 models for MOT pass rate.

With an average of 37,259 miles recorded at its 2024 MOT tests, BMW 318D M Sport MHEV Auto 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 318D M Sport MHEV Auto Fuel Costs

The 1995cc diesel hybrid engine offers a reasonable balance between performance and economy. Our estimate uses around 48 mpg, the figure for a diesel engine of this size, which works out to roughly £1,397 per year with diesel at 199.33p per litre (GOV.UK weekly average, week of 19 October 2026; based on 7,400 miles per year). As a hybrid it should use less than that, and real-world fuel costs depend a lot on how much electric-only driving you do.

What does it cost to own a 2021 BMW 318D M Sport MHEV Auto?

Total estimated annual running cost is £2,002 (£167/month), broken down as £1,397 fuel, £200 road tax, £55 MOT, and £350 predicted repairs. Repair costs are moderate, reflecting the 88% pass rate. Keeping on top of servicing will help avoid surprises.

Buying a Used 2021 BMW 318D M Sport MHEV Auto

At 5 years old, the BMW 318D M Sport MHEV Auto offers good value with plenty of life remaining. Most manufacturer warranties will have expired, so a pre-purchase inspection is worth the cost.

Common Issues to Watch For

These are typical issues for cars of this age, fuel type and engine size, not faults recorded on this model's MOT tests. Use them as a checklist when you view one.

Hybrid Battery Health

Medium risk

After 5 years, hybrid battery capacity may have reduced. A full replacement costs £2,000-£4,000, though reconditioning is cheaper at £500-£1,500.

Inverter and Power Electronics

Low risk

The inverter converts DC to AC for the electric motor. Failures are expensive (£1,500+) but relatively rare. Listen for unusual buzzing sounds.

Regenerative Braking

Medium risk

Brake discs can corrode from reduced use (the electric motor handles most braking). Surface rust is normal but deep pitting needs attention.

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 2021 BMW 318D M Sport MHEV Auto stacks up against similar cars for estimated annual running costs, insurance group, and tax.

Car	Pass Rate	Fuel/yr	Tax/yr	Est. Ins. Group	Total/yr
BMW 318D M Sport MHEV Auto(2021)	88%	£1,397	£200	Grp 18-32	£2,002
Land Rover Discovery Sport R-DYN SE D A(2020)	90%	£1,397	£200	Grp 18-32	£1,852-£150
BMW 520D M Sport MHEV Auto(2021)	89%	£1,397	£200	Grp 18-32	£2,002same
BMW 320D M Sport MHEV Auto(2021)	91%	£1,397	£200	Grp 18-32	£1,852-£150
Volvo XC90 R-Design B5 MHEV Awd Auto(2021)	90%	£1,397	£200	Grp 18-32	£1,852-£150

Estimates based on 7,400 miles/year, GOV.UK average pump prices for the week of 19 October 2026, GOV.UK road tax rates and MOT data. Insurance groups are our rough estimate from engine size, not official groups. Actual costs vary by driver, location, and usage.

Questions about the 2021 BMW 318D M Sport MHEV Auto

Is the 2021 BMW 318D M Sport MHEV Auto reliable?

Good reliability. Occasional issues but generally solid. 88% of MOT tests on 2021 BMW 318D M Sport MHEV Autos ended in a pass, from 811 tests (DVSA MOT data for tests in 2024, retests included). That's 6 points above the average of 82% across all models in the same data.

How much does a 2021 BMW 318D M Sport MHEV Auto cost to run?

Our estimate is £2,002 a year (£167 a month): £1,397 fuel, £200 road tax, £55 MOT and £350 predicted repairs, based on 7,400 miles a year. Insurance is not included.

What is the MOT pass rate for a 2021 BMW 318D M Sport MHEV Auto?

88% of 811 MOT tests on the 2021 BMW 318D M Sport MHEV Auto ended in a pass (DVSA MOT data for tests in 2024, retests included). That ranks it 2795th of 3,336 models first registered in 2021 (bottom 17%).

Which year BMW 318D M Sport MHEV Auto has the best MOT pass rate?

Of the years with at least 100 tests, the 2020 BMW 318D M Sport MHEV Auto has the highest MOT pass rate at 90% and the 2021 the lowest at 88%. Newer cars usually pass more often simply because they are younger and have done fewer miles.

What is the average mileage for a 2021 BMW 318D M Sport MHEV Auto?

The average mileage recorded at MOT tests on the 2021 BMW 318D M Sport MHEV Auto is 37,259 miles, 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.