BMW 4 Series reliability, MPG and running costs
Figures updated
The BMW 4 Series is a executive car; the latest version we cover is the G22 (2020–). In 2024 MOT tests it scored 138 for reliability (100 is average), ranking 88 of 442, and 16.4% failed first time against a UK average of 28.5%. Its most common MOT failure is condition (2.4% of tests). Boot space is 440 litres.
BMW 4 Series key specs (G22 (2020–), 2-door coupé)
Price new
£46,180 to £63,385
Boot
440 litres
Seats
4
Size (L × W × H)
4,768 × 1,852 × 1,383mm
Power
184–374 PS
0–62mph
4.5–7.5 sec
Euro NCAP
5 stars (2019)
2020 on models; figures vary by version. Prices from the July 2026 price list. Sources: bmw-brochure-downloads.co.uk, press.bmwgroup.com, euroncap.com.
Ranked 88 of 442 cars in the 2024 MOT Reliability League, and 5 of 16 executive cars
In 2024, 103,945 BMW 4 Serieses aged 3 to 20 had an MOT and 16.4% failed first time (UK average 28.5%). Taking age and mileage into account, the BMW 4 Series is 28% less likely to fail than the average car of the same age and mileage. At the first MOT, at three years old, 13.1% failed (UK 12.7%).
First-time fail rate
16.4%
UK 28.5%
Fail rate at 3 years
13.1%
UK 12.7%
Average miles a year
9,200
Typical age at test: 7 years
BMW 4 Series MOT failure rate by age
Most common BMW 4 Series MOT faults
- Condition: has ply or cords exposed2.4% of tests
- Tread depth: tread depth below requirements of 1.6mm2.1% of tests
- Condition: has a cut in excess of the requirements deep enough to reach the ply or cords2.0% of tests
- Condition: has a bulge, caused by separation or partial failure of its structure1.9% of tests
- Brake pads: less than 1.5 mm thick1.2% of tests
- Shock absorbers: has a serious fluid leak1.1% of tests
What the BMW 4 Series fails on
| Area | Tests failing | vs similar cars |
|---|---|---|
| Tyres | 8.7% | ▲ 1.3× as often |
| Lights and electrics | 2.9% | ▼ 57% less often |
| Brakes | 2.4% | ▼ 49% less often |
| Suspension | 2.0% | ▼ 62% less often |
| Visibility | 1.8% | ▼ 51% less often |
| Wheels | 1.0% | ▲ 3.0× as often |
| Exhaust and emissions | 0.6% | ▼ 72% less often |
| Body and structure | 0.3% | ▼ 82% less often |
| Seat belts and airbags | 0.1% | ▼ 69% less often |
| Steering | 0.1% | ▼ 88% less often |
How big is the BMW 4 Series's boot?
The G22 (2020–) BMW 4 Series has 440 litres of boot space with the rear seats up, according to the manufacturer. That's the 8th biggest of the 8 executive cars we compare; the Mercedes-Benz E-Class has the most, at 540 litres.
What MPG does the BMW 4 Series do?
Official economy for the BMW 4 Series ranges from 32.8 to 70.6mpg across the 279 versions listed by the Vehicle Certification Agency (2014–2025). A typical petrol version manages 40.3mpg and a typical diesel 60.1mpg. Expect 10–15% less in real-world driving.
Work out a journey's fuel costHow much is road tax on a BMW 4 Series?
Any BMW 4 Series first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). Versions with a list price over £40,000 pay an extra £440 a year in years two to six; every current version is over that. A BMW 4 Series registered between March 2001 and March 2017 is taxed on its CO2: £20 to £410 a year.
Work out tax for a specific carBMW 4 Series specs and running costs
Official figures for 279 versions sold in the UK between 2014 and 2025.
Fuel types
Diesel, Petrol
Official economy
32.8–70.6 mpg
CO2
106–195 g/km
Power
184–374 PS
| Version | Fuel | Economy | CO2 | Car tax | Company car tax |
|---|---|---|---|---|---|
| 4 Series Convertible 420i M Sport Convertible184 PS · A8 · listed 2025 | Petrol | 40.3 mpg | 154g | £200 | 36% |
| 4 Series Coupé 420i M Sport Coupé184 PS · A8 · listed 2025 | Petrol | 42.8 mpg | 144g | £200 | 34% |
| 4 Series Gran Coupé 420i M Sport Gran Coupé184 PS · A8 · listed 2025 | Petrol | 40.3 mpg | 152g | £200 | 36% |
| 4 Series Convertible M440i xDrive Convertible374 PS · A8 · listed 2025 | Petrol | 32.8 mpg | 182g | £200 | 37% |
| 4 Series Coupé M440i xDrive Coupé374 PS · A8 · listed 2025 | Petrol | 33.6 mpg | 176g | £200 | 37% |
| 4 Series Gran Coupé BMW M440i xDrive Gran Coupé374 PS · A8 · listed 2025 | Petrol | 33.6 mpg | 186g | £200 | 37% |
| 4 Series Coupé F32, From October 2013 418d Coupé - 17'' tyresM6 · listed 2018 | Diesel | 67.3 mpg | 110g | £200 | – |
| 4 Series Coupé F32, From October 2013 418d Coupé - 18'' & 19'' tyresM6 · listed 2018 | Diesel | 62.8 mpg | 118g | £200 | – |
| 4 Series Coupé F32, From October 2013 418d Coupé - 17'' tyresA8 · listed 2018 | Diesel | 68.9 mpg | 109g | £200 | – |
| 4 Series Coupé F32, From October 2013 418d Coupé - 18'' & 19'' tyresA8 · listed 2018 | Diesel | 64.2 mpg | 117g | £200 | – |
| 4 Series Coupé F32, From October 2013 420d Coupé - 17'' tyresM6 · listed 2018 | Diesel | 67.3 mpg | 111g | £200 | – |
| 4 Series Coupé F32, From October 2013 420d Coupé - 18'' & 19'' tyresM6 · listed 2018 | Diesel | 62.8 mpg | 119g | £200 | – |
| 4 Series Coupé F32, From October 2013 420d Coupé - 17'' tyresA8 · listed 2018 | Diesel | 70.6 mpg | 106g | £200 | – |
| 4 Series Coupé F32, From October 2013 420d Coupé - 18'' & 19'' tyresA8 · listed 2018 | Diesel | 65.7 mpg | 114g | £200 | – |
| 4 Series Coupé F32, From October 2013 420d xDrive Coupé - 17'' tyresM6 · listed 2018 | Diesel | 64.2 mpg | 117g | £200 | – |
Economy and CO2 are official NEDC (before 2018) or WLTP figures. Car tax is the yearly rate at current rates for a car first registered in the year listed, before any expensive car supplement. Company car tax is the 2026/27 benefit-in-kind rate. Showing the 15 most recent of 279 versions.
What a BMW 4 Series costs to fuel
- petrol, typical official 40.3mpg…
- diesel, typical official 60.1mpg…
Official figures are usually 10–15% better than real-world driving.
Work out a journey in a BMW 4 SeriesBuying a used BMW 4 Series?
Check the MOT history of the exact car: every result, advisory and mileage reading, free.
Compare the BMW 4 Series with other executive cars
Reliability, economy, car tax and running costs side by side.
Other BMW models
Frequently asked questions
›Is the BMW 4 Series reliable?
Its MOT record is better than average: the BMW 4 Series is 28% less likely to fail than the average car of the same age and mileage, with a reliability score of 138 in our 2024 league (100 is average).
›What are common problems with the BMW 4 Series?
The most common MOT fault is “Condition: has ply or cords exposed”, found in 2.4% of tests. It fails on tyres more often than similar cars.
›How big is the BMW 4 Series's boot?
The G22 (2020–) BMW 4 Series has 440 litres of boot space with the rear seats up, according to the manufacturer. That's the 8th biggest of the 8 executive cars we compare; the Mercedes-Benz E-Class has the most, at 540 litres.
›What MPG does the BMW 4 Series do?
Official economy for the BMW 4 Series ranges from 32.8 to 70.6mpg across the 279 versions listed by the Vehicle Certification Agency (2014–2025). A typical petrol version manages 40.3mpg and a typical diesel 60.1mpg. Expect 10–15% less in real-world driving.
›How much is road tax on a BMW 4 Series?
Any BMW 4 Series first registered from April 2017 pays the standard rate of £200 a year after its first year (2026/27 rates). Versions with a list price over £40,000 pay an extra £440 a year in years two to six; every current version is over that. A BMW 4 Series registered between March 2001 and March 2017 is taxed on its CO2: £20 to £410 a year.
›How many BMW 4 Serieses fail their MOT?
16.4% of BMW 4 Serieses aged 3 to 20 failed their MOT first time in 2024, and 13.1% failed at their first MOT.
Sources: DVSA anonymised MOT tests 2024, all versions of the BMW 4 Series combined (Open Government Licence v3.0); official economy and CO2 from Vehicle Certification Agency data, © Crown copyright. VCA cannot accept liability for its accuracy. How we calculate the league.