BMW M340I Problems by Model Year
NHTSA recorded 74 consumer complaints across the 3 model years of the BMW M340I (2020–2022) that have at least 5 complaints. 2020 has the most, with 56. Across all years, the part named most often is engine (49 mentions). Pick a model year below to see its parts, mileage, recalls and service bulletins.
All M340I model years
Years with fewer than 5 complaints are not listed. The score compares years of the same model, allowing for the era and for how long each year has collected complaints: 50 is a typical year, lower means fewer complaints. It is not adjusted for sales volume.
| Year | Complaints | Median mi | Recalls | TSBs | Score (50 = typical) | Trend |
|---|---|---|---|---|---|---|
| 2022 | 7 | 300 | 1 | 58 | — | Not enough data |
| 2021 | 11 | 4,000 | 6 | 183 | — | Not enough data |
| 2020 | 56 | 37,331 | 10 | 251 | Not compared (fewer than 3 comparable model years) | Rising |
Parts named most often, all years
Counts add up complaint mentions across the listed years. A complaint can name several parts.
- Engine49 56%
- Other or unknown10 11%
- Electrical system9 10%
- Transmission and drivetrain6 6.8%
- Fuel system4 4.5%
- Engine cooling4 4.5%
- Steering3 3.4%
- Brakes3 3.4%
Example complaints
One per model year, chosen for length and detail. Personal details are removed. They are consumer reports, not findings.
2020: “I was driving on the highway at approximately 70 MPH, the posted limit, when all of a sudden the sunroof exploded. It sounded like a gunshot and I almost lost control of the vehicle. Luckily the headliner was closed so the glass did not enter the cabin. There were no vehicles in front of us for at least 1 mile and no overpasses or rocks that I saw or heard hitting the vehicle. It is a stock vehicle with 5200 miles on it.”
NHTSA complaint #11339650, filed 2020-07, 5,100 miles2021: “Here’s a strong version that sounds frustrated but still credible and harder to dismiss: I’ve owned many vehicles over the years, and this BMW has been, without question, the most problematic car I’ve ever had. The list of issues has been absurd for a vehicle in this price range and from a brand that markets itself as a premium luxury manufacturer. …”
NHTSA complaint #11738468, filed 2026-052022: “The brakes failed at high speed. Yes the vehicle is available for inspection. The car hit a barrier and flipped on its roof. Yes, I and my passenger were both at risk of serious injury. No independent confirmation has taken place at this time. No warning lights indicated malfunction.”
NHTSA complaint #11485941, filed 2022-09Other BMW models
3,165 complaintsBMW 328I
2,576 complaintsBMW X3
2,016 complaintsBMW 325I
1,377 complaintsBMW Z4
1,271 complaintsBMW 3 Series
832 complaintsBMW 528I
830 complaintsBMW 330I
813 complaints
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 27, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate. Methodology