The Lemon Index
BMW 4 Series reliability: problems, specs and engines by year.
Owners filed 419 complaints about the 2014–2026 BMW 4 Series with the government, most about engine.
Complaints by model year
| Model year | Complaints | Engines | Top areas |
|---|---|---|---|
| 2014 | 69 | N20, N55 | engine, electrical |
| 2015 | 107 | N20, N55, S55 | engine, electrical |
| 2016 | 78 | N20, N55, S55 | engine, electrical |
| 2017 | 32 | B48, B58, S55 | engine, other |
| 2018 | 49 | B48, B58, S55 | engine, electrical |
| 2019 | 26 | B48, B58, S55 | engine, air bags |
| 2020 | 6 | B48, B58, S55 | engine, brakes |
| 2021 | 22 | B48, B58, S58 | electrical, engine |
| 2022 | 10 | B48, B58, S58 | transmission & drivetrain, engine |
| 2023 | 6 | B48, B58, S58 | seat belts, other |
| 2024 | 4 | B48, B58, S58 | speed control, collision warning |
| 2025 | 8 | S58 | electrical, transmission & drivetrain |
| 2026 | 2 | B58, S58 | electrical, transmission & drivetrain |
We don't have US sales for this model yet, so there's no Lemon Index: popular years draw more complaints partly because more were sold.
Scores are per model year, so a year with several engines shows the same score next to each one. An empty complaints bar means too few complaints to score that year; a gray dot means not enough YouTube videos. Sources: Wikipedia: BMW B48 · Wikipedia: BMW B58 · Wikipedia: BMW N20 · Wikipedia: BMW N55 · Wikipedia: BMW S58 · EPA fueleconomy.gov.
What owners complain about
| System | Share of complaints |
|---|---|
| Engine | 28% |
| Electrical | 20% |
| Other | 9% |
| Fuel system | 7% |
| Transmission & drivetrain | 7% |
| Brakes | 5% |
When problems show up
Half of the owners who gave a mileage reported the problem between 15,370 and 69,700 miles (middle: 41,458, from 185 complaints).
How serious
| Crashes | Fires | Injury reports | Death reports |
|---|---|---|---|
| 36 | 12 | 22 | 0 |
As reported by owners to NHTSA. Not verified.
Recalls we found 26
26V056000 31/01/2026 · 2021, 2022, 2023
ELECTRICAL SYSTEM:STARTER ASSEMBLY
25V871000 17/12/2025 · 2014
AIR BAGS:SIDE/WINDOW:HEAD
25V636000 23/09/2025 · 2021, 2022
ELECTRICAL SYSTEM:STARTER ASSEMBLY:RELAY
25V202000 01/04/2025 · 2025
ELECTRICAL SYSTEM:STARTER ASSEMBLY
24V608000 14/08/2024 · 2014, 2015, 2016
ENGINE AND ENGINE COOLING:COOLING SYSTEM:PUMP
24V527000 11/07/2024 · 2014, 2015
AIR BAGS:FRONTAL:DRIVER SIDE:INFLATOR MODULE
24V288000 24/04/2024 · 2014, 2015
AIR BAGS:SIDE/WINDOW
23V584000 16/08/2023 · 2021, 2022
SEAT BELTS
23V118000 23/02/2023 · 2022, 2023
ELECTRICAL SYSTEM:BODY CONTROL MODULE:SOFTWARE
22V267000 20/04/2022 · 2022
VISIBILITY:SUN/MOON ROOF ASSEMBLY
21V554000 21/07/2021 · 2021
SEAT BELTS
21V176000 15/03/2021 · 2021
AIR BAGS:SIDE/WINDOW:THORAX
21V096000 19/02/2021 · 2021
BACK OVER PREVENTION: SENSING SYSTEM: CAMERA
20V761000 09/12/2020 · 2021
ELECTRICAL SYSTEM:12V/24V/48V BATTERY
19V352000 09/05/2019 · 2019, 2020
AIR BAGS:KNEE BOLSTER
18V713000 11/10/2018 · 2016
POWER TRAIN:DRIVELINE:DRIVESHAFT
18V533000 15/08/2018 · 2019
AIR BAGS:FRONTAL:PASSENGER SIDE:INFLATOR MODULE
18V465000 12/07/2018 · 2019
ENGINE AND ENGINE COOLING:ENGINE
17V507000 16/08/2017 · 2018
SEAT BELTS:FRONT
17V115000 23/02/2017 · 2017
AIR BAGS
16V914000 20/12/2016 · 2017
AIR BAGS
16V653000 09/09/2016 · 2015, 2016
STRUCTURE:FRAME AND MEMBERS
15V782000 23/11/2015 · 2015, 2016
POWER TRAIN:DRIVELINE:DRIVESHAFT
15V189000 31/03/2015 · 2014, 2015
FUEL SYSTEM, GASOLINE:DELIVERY:FUEL PUMP
15V148000 13/03/2015 · 2015
AIR BAGS
From NHTSA's recall lookup by model name and year; check a car's VIN for its own open recalls.
BMW 4 Series specs and engines, every year. Every version the EPA lists, with its engine and owner complaints.
Engines used: B48B58N20N55S55S58
2026 · 7 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| M440i | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | RWD | 28–30 mpg | 2 complaints (all engines combined) |
| M440i xDrive | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | AWD | 27–29 mpg | 2 complaints (all engines combined) |
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 2 complaints (all engines combined) |
| 430i | not confirmed | 2.0 L I4 turbo + mild hybrid | — | 8-speed auto | RWD | 30–31 mpg | 2 complaints (filed as 430i) |
| 430i xDrive | not confirmed | 2.0 L I4 turbo + mild hybrid | — | 8-speed auto | AWD | 28–30 mpg | 2 complaints (filed as 430i) |
| M4 Competition | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | RWD | 19 mpg | 2 complaints (all engines combined) |
| M4 Competition M xDrive | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | AWD | 18 mpg | 2 complaints (all engines combined) |
2025 · 8 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 8 complaints (all engines combined) |
| 430i | not confirmed | 2.0 L I4 turbo + mild hybrid | — | 8-speed auto | RWD | 30–31 mpg | 7 complaints (filed as 430i) |
| 430i xDrive | not confirmed | 2.0 L I4 turbo + mild hybrid | — | 8-speed auto | AWD | 28–30 mpg | 7 complaints (filed as 430i) |
| M4 CS | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | AWD | 18 mpg | 8 complaints (all engines combined) |
| M4 Competition | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | RWD | 19 mpg | 8 complaints (all engines combined) |
| M4 Competition M xDrive | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | AWD | 18 mpg | 8 complaints (all engines combined) |
| M440i | not confirmed | 3.0 L I4 turbo + mild hybrid | — | 8-speed auto | RWD | 28–30 mpg | 1 complaint (filed as M440i) |
| M440i xDrive | not confirmed | 3.0 L I4 turbo + mild hybrid | — | 8-speed auto | AWD | 27–29 mpg | 1 complaint (filed as M440i) |
2024 · 7 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | RWD | 28 mpg | 2 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | AWD | 27 mpg | 2 complaints (filed as 430i) |
| M440i | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | RWD | 26–27 mpg | 1 complaint (filed as M440i) |
| M440i xDrive | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | AWD | 25 mpg | 1 complaint (filed as M440i) |
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 4 complaints (all engines combined) |
| M4 Competition | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | RWD | 19 mpg | 4 complaints (all engines combined) |
| M4 Competition M xDrive | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | AWD | 18 mpg | 4 complaints (all engines combined) |
2023 · 8 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | RWD | 28 mpg | 3 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | AWD | 27 mpg | 3 complaints (filed as 430i) |
| M440i | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | RWD | 26–27 mpg | 3 complaints (filed as M440i) |
| M440i xDrive | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | AWD | 25 mpg | 3 complaints (filed as M440i) |
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 6 complaints (all engines combined) |
| M4 Competition | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | RWD | 19 mpg | 6 complaints (all engines combined) |
| M4 Competition M xDrive | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | AWD | 18 mpg | 6 complaints (all engines combined) |
| M4 CSL | not confirmed | 3.0 L I6 turbo | — | 8-speed auto | RWD | 18 mpg | 6 complaints (all engines combined) |
2022 · 7 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | RWD | 28 mpg | 8 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | AWD | 27 mpg | 8 complaints (filed as 430i) |
| M440i | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | RWD | 26–28 mpg | 10 complaints (all engines combined) |
| M440i xDrive | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | AWD | 25–26 mpg | 10 complaints (all engines combined) |
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 10 complaints (all engines combined) |
| M4 Competition | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | RWD | 19 mpg | 10 complaints (all engines combined) |
| M4 Competition M xDrive | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | AWD | 18 mpg | 10 complaints (all engines combined) |
2021 · 6 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | RWD | 27–29 mpg | 15 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 255 hp · 295 lb-ft | 8-speed auto | AWD | 27 mpg | 15 complaints (filed as 430i) |
| M440i | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | RWD | 26 mpg | 6 complaints (filed as M440i) |
| M440i xDrive | B58 | 3.0 L I6 turbo + mild hybrid | 382 hp · 369 lb-ft | 8-speed auto | AWD | 25 mpg | 6 complaints (filed as M440i) |
| M4 | S58 | 3.0 L I6 turbo | 473 hp · 406 lb-ft | 6-speed manual | RWD | 19 mpg | 22 complaints (all engines combined) |
| M4 Competition | S58 | 3.0 L I6 turbo | 503 hp · 479 lb-ft | 8-speed auto | RWD | 19 mpg | 22 complaints (all engines combined) |
2020 · 7 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 25–27 mpg | 5 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 8-speed auto | AWD | 24–26 mpg | 5 complaints (filed as 430i) |
| 440i | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | RWD | 22–25 mpg | 6 complaints (all engines combined) |
| 440i xDrive | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | AWD | 21–25 mpg | 6 complaints (all engines combined) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 6 complaints (all engines combined) |
| M4 CS | S55 | 3.0 L I6 turbo | 453 hp | 7-speed dual-clutch | RWD | 19 mpg | 6 complaints (all engines combined) |
| M4 Competition | S55 | 3.0 L I6 turbo | 444 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 6 complaints (all engines combined) |
2019 · 7 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 25–27 mpg | 22 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 8-speed auto | AWD | 26–27 mpg | 22 complaints (filed as 430i) |
| 440i | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | RWD | 22–25 mpg | 4 complaints (filed as 440i) |
| 440i xDrive | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | AWD | 21–24 mpg | 4 complaints (filed as 440i) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 26 complaints (all engines combined) |
| M4 CS | S55 | 3.0 L I6 turbo | 453 hp | 7-speed dual-clutch | RWD | 19 mpg | 26 complaints (all engines combined) |
| M4 Competition | S55 | 3.0 L I6 turbo | 444 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 26 complaints (all engines combined) |
2018 · 6 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 25–27 mpg | 36 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 8-speed auto | AWD | 26–27 mpg | 36 complaints (filed as 430i) |
| 440i | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | RWD | 23–25 mpg | 7 complaints (filed as 440i) |
| 440i xDrive | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | AWD | 23–25 mpg | 7 complaints (filed as 440i) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 49 complaints (all engines combined) |
| M4 DTM Champions Edition | S55 | 3.0 L I6 turbo | 493 hp · 443 lb-ft | 7-speed dual-clutch | RWD | 20 mpg | 49 complaints (all engines combined) |
2017 · 5 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 430i | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 25–27 mpg | 25 complaints (filed as 430i) |
| 430i xDrive | B48 | 2.0 L I4 turbo | 248 hp · 258 lb-ft | 8-speed auto | AWD | 26 mpg | 25 complaints (filed as 430i) |
| 440i | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | RWD | 23–25 mpg | 5 complaints (filed as 440i) |
| 440i xDrive | B58 | 3.0 L I6 turbo | 322 hp · 332 lb-ft | 6-speed manual, 8-speed auto | AWD | 23–25 mpg | 5 complaints (filed as 440i) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 32 complaints (all engines combined) |
2016 · 6 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 428i | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 26–27 mpg | 44 complaints (filed as 428i) |
| 428i xDrive | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 8-speed auto | AWD | 25–26 mpg | 44 complaints (filed as 428i) |
| 435i | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | RWD | 23–24 mpg | 12 complaints (filed as 435i) |
| 435i xDrive | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | AWD | 22–23 mpg | 12 complaints (filed as 435i) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 78 complaints (all engines combined) |
| M4 GTS | S55 | 3.0 L I6 turbo | 493 hp · 443 lb-ft | 7-speed dual-clutch | RWD | 19 mpg | 78 complaints (all engines combined) |
2015 · 5 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 428i | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 26–27 mpg | 79 complaints (filed as 428i) |
| 428i xDrive | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 8-speed auto | AWD | 25–26 mpg | 79 complaints (filed as 428i) |
| 435i | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | RWD | 24–25 mpg | 16 complaints (filed as 435i) |
| 435i xDrive | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | AWD | 23–24 mpg | 16 complaints (filed as 435i) |
| M4 | S55 | 3.0 L I6 turbo | 425 hp | 6-speed manual, 7-speed dual-clutch | RWD | 19–20 mpg | 107 complaints (all engines combined) |
2014 · 4 versions
| Version | Engine | Size | Power | Transmission | Drive | EPA | Owner complaints |
|---|---|---|---|---|---|---|---|
| 428i | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 6-speed manual, 8-speed auto | RWD | 26–27 mpg | 41 complaints (filed as 428i) |
| 428i xDrive | N20 | 2.0 L I4 turbo | 241 hp · 258 lb-ft | 8-speed auto | AWD | 25–26 mpg | 41 complaints (filed as 428i) |
| 435i | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | RWD | 23–25 mpg | 28 complaints (filed as 435i) |
| 435i xDrive | N55 | 3.0 L I6 turbo | 302 hp · 295 lb-ft | 6-speed manual, 8-speed auto | AWD | 23–24 mpg | 28 complaints (filed as 435i) |
Engine sizes, transmissions, drive and MPG: EPA (fueleconomy.gov). Engine codes and power: BMW's ratings as listed in Wikipedia's BMW engine articles (US-rated figures can differ by a few hp); "not confirmed" means we couldn't source the code for that version. Owner complaints: NHTSA, about the whole car (any system), not only the engine. Index = the model year's Lemon Index (complaints per car sold vs the average car); it is shown for a version only when that was the only engine that year. A complaint count is not a failure rate: popular versions draw more complaints because more were sold.
Quick answers
What are the most common BMW 4 Series problems?
In owner complaints to the government, the top areas are engine, electrical, other.
What engines does the BMW 4 Series have?
By model year: 2021: B48, B58, S58; 2022: B48, B58, S58; 2023: B48, B58, S58; 2024: B48, B58, S58; 2025: S58; 2026: B58, S58. Full list in the specs table.
Know someone shopping for a used car?
Updated · Free to use with credit: Source: The Lemon Index (lemonindex.com)
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