BMW M340i years to avoid and best years
There are not enough BMW M340i years yet to compare newer ones with older ones. 2020 has the most complaints per year, at 1 (53 complaints). 2020 through 2022 are in that same range. Among years old enough to compare, the fewest complaints per year are 2022 at 1 (from 7 complaints), 2021 at 1 (from 11 complaints), and 2020 at 1 (from 53 complaints). The BMW M340i 2025 and 2026 model years are too early to compare: none has had 3 full years on the road yet. On the 2020 BMW M340i, 29 of 53 complaints name Engine.
Data as of .
2022
2021
2020
2025–26
BMW M340i reliability by year
Each year is complaints filed in that year’s first 3 years on the road, divided by however many of those years have passed. A model year younger than 3 years is too early to compare, so it is left out of the years named as having the fewest or the most complaints. Recalls are a separate count. The numbers are for the US-market BMW M340i. How we count.
By model year
| Year | Per year on the road | Complaints | Recalls | Most-filed complaint | Avg. combined MPG |
|---|---|---|---|---|---|
| 2026 Too early | 0 | 0 | 0 | — | 29 |
| 2025 Too early | 0 | 0 | 0 | — | 29 |
| 2024 | 0 | 0 | 0 | — | 26 |
| 2023 | 0 | 0 | 1 | — | 26 |
| 2022 → Fewest | 1 | 7 | 1 | Air bags | 26 |
| 2021 → Fewest | 1 | 11 | 6 | Engine | 25.5 |
| 2020 → Most | 1 | 53 | 10 | Engine | 25 |
Years with a → link have a full model-year page.
What owners file about
Generations
- Body styles
- Sedan
- Oil
- SAE 0W-20 (B58; confirm BMW LL spec on under-hood label)
- Tire size
- 225/35R19, 225/40R18, 225/45R17, 255/30R19, 255/35R18 (trim-dependent; staggered) front / 255/30R19, 255/35R18 (trim-dependent; staggered) rear
Known issues for this generation
Recall 21V598000 covers certain 2020 M340i and M340i xDrive models (with 540i, X3 M40i, X4 M40i, 745Le, and other B58 applications) for an engine concern on that campaign list; dealers perform the remedy described in NHTSA's campaign text. Recall 20V355000 covers certain 2019-2020 M340i and M340i xDrive models (with Z4, X3M, X4M, and 330i xDrive) for a tie rod assembly that may fail. Recall 19V755000 covers certain 2020 M340i models (with 330i) where the interior trunk release cable may have been incorrectly routed.
Frequently asked questions
Which BMW M340i years have fewer owner complaints?
Among years old enough to compare, the fewest complaints per year are 2022 at 1 (from 7 complaints), 2021 at 1 (from 11 complaints), and 2020 at 1 (from 53 complaints).
Which BMW M340i year has the most owner complaints?
2020 has the most complaints per year, at 1 (53 complaints). 2020 through 2022 are in that same range. On the 2020 BMW M340i, 29 of 53 complaints name Engine.
How do BMW M340i owner complaints compare by year?
There are not enough BMW M340i years yet to compare newer ones with older ones.
Which BMW M340i years are too early to compare?
The BMW M340i 2025 and 2026 model years are too early to compare: none has had 3 full years on the road yet.
What engine oil does a US BMW M340i use?
SAE 0W-20 (B58; confirm BMW LL spec on under-hood label)
What tire sizes fit a US BMW M340i?
Published US specs commonly list front 225/35R19, 225/40R18, 225/45R17, 255/30R19, 255/35R18 (trim-dependent; staggered) and rear 255/30R19, 255/35R18 (trim-dependent; staggered); confirm on the door jamb placard for your trim.
What NHTSA recalls affect the US BMW M340i?
Recall 21V598000 covers certain 2020 M340i and M340i xDrive models (with 540i, X3 M40i, X4 M40i, 745Le, and other B58 applications) for an engine concern on that campaign list; dealers perform the remedy described in NHTSA's campaign text. Recall 20V355000 covers certain 2019-2020 M340i and M340i xDrive models (with Z4, X3M, X4M, and 330i xDrive) for a tie rod assembly that may fail. Recall 19V755000 covers certain 2020 M340i models (with 330i) where the interior trunk release cable may have been incorrectly routed.