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Electrical systemPart report

2020 BMW M340I Electrical system Problems

Complaints
6about this part
Share
11%of 57 total for the year
Median mileage
28,162miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 6 complaints about the electrical system of the 2020 BMW M340I, 11% of the 57 complaints for this model year. Where a mileage was given, the median is 28,162 miles. 1 recall campaign on record is filed under a similar system.

Fewer than 15 complaints name this part, so treat the figures as a rough indication only.

Example complaints

Selected from NHTSA records; personal details are removed. They are consumer reports, not findings.

“Brought my car in for a starter recall picked it up next day and drove home then came out to turn my vehicle on again and it wouldn’t start. Burning smell from engine bay as well. Returned the car they inspected it and told me a faulty starter. When I brought the car in it was in perfect working condition I only brought it for the recall. I was then held accountable for 25% of repair costs.”

NHTSA complaint #11610022, filed 2024-08

“The starter malfunctioned causing electrical damage to the motor and related components. Although there is literature that exists that this is a potential problem for this vehichle, BMW refuses to fix the problem and is asking me to pay. My warranty is expired by 4 months, but I have only 37,800 miles. The fact that there are 105K vehicles with this potential problem is evidence that this problem exists. They should be paying for what is an obvious manufacturer defect.”

NHTSA complaint #11631042, filed 2024-12

“Engine starter was faulty resulting in repeated attempts to start the engine using excessively long starting attempts and warnings from my car of overheating. At a traffic light, my car went into auto-off and then shut down and I was unable to restart the car leaving me stuck at a busy intersection. I received police support and a tow to the BMW Buena Park dealership. The dealership informed me the issue could be related to an open recall (B120524) which relates to the starter. The dealership replaced the starter but claims the issue is not related to the recall. …”

NHTSA complaint #11629307, filed 2024-12

“The contact owns a 2020 BMW M340I. The contact stated that the vehicle was repaired under NHTSA Campaign Number: 24V576000 (Electrical System, Engine and Engine Cooling); however, the repair failed to prevent the failure from occurring. The contact stated that shortly after the recall repair was completed, the vehicle hesitated to start. The contact stated that several employees at the local dealer attempted to start the vehicle. The vehicle started; however, several months later, the failure reoccurred. An appointment with the dealer was scheduled to inspect the vehicle. …”

NHTSA complaint #11659699, filed 2025-05, 28,162 miles

“Starter went bad which lead to shortage within the lithium ion battery and regular battery. Car came to a stop and did not move in an intersection, blocking both lanes of traffic. Furthermore, car could not be put into neutral as it could not be started. There was smoke emanating from the engine on further restart attempts. Car had to be towed where it was determine this was the problem. Warning message during re-start engine overheated though temperate guage suggested it was still cold.”

NHTSA complaint #11611038, filed 2024-08

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2022114%
2021218%
2020611%

Other parts of the 2020 BMW M340I

Engine
42 complaintsOther or unknown
9 complaintsEngine cooling
4 complaintsFuel system
3 complaintsTires
2 complaintsTransmission and drivetrain
2 complaintsBrakes
1 complaintsWheels
1 complaints

← All problems reported for the 2020 BMW M340I

About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 28, 2026. Complaints are unverified consumer reports and may be duplicated or inaccurate.

To check a specific vehicle for open recalls, use its VIN at nhtsa.gov/recalls. Methodology