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Electrical systemPart report

2021 BMW 330I Electrical system Problems

Complaints
13about this part
Share
45%of 29 total for the year
Median mileage
33,672miles
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 13 complaints about the electrical system of the 2021 BMW 330I, 45% of the 29 complaints for this model year. Where a mileage was given, the median is 33,672 miles. 3 a fire, according to the filers. 3 recall campaigns on record are 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.

“My BMW 330i 2021 caught on fire while I was driving. Smoke came from the hood, and I open the hood and seen the Fire, and I called the Newark NJ Fire Department. see attached photo of the BMW after the fire.”

NHTSA complaint #11690303, filed 2025-09

“In September of 2025, I was notified twice by BMW via mail that my car is under recall. The NHTSA Recall Number is 25V636000. It is possible for water to contact and enter the engine starter. This could lead to corrosion which could cause a short circuit and ultimately a fire. They told me it would be fixed free of charge and I would be notified when the remedy was available. There were no such warnings or messages of the problem prior to being notified of this potential failure. Their mailed instructions told me to park the car outside which I did. …”

NHTSA complaint #11724701, filed 2026-03

“Message on Console - Passenger Restraint system malfunction . Took vehicle in for Repair; BMW Dealership thinks it may be a wiring harness electrical short. They evidently need to discuss problem with BMW Corporate to figure out to properly diagnose problem and how to repair. My husband and I are very concerned about driving this car even after it may be so called repaired. We are concerned that if an accident does occur, and one or more of the airbags do not deploy; there may be serious injury or death to myself, my husband, grandkids, or other passengers.”

NHTSA complaint #11477793, filed 2022-08

“The contact owns a 2021 BMW 330I. The contact stated that while the vehicle was parked with the engine running, the engine was shaking abnormally. There was no warning light illuminated. The contact received notification of NHTSA Campaign Number: 25V636000 (Electrical System). The dealer was contacted and confirmed that parts were not yet available. The vehicle was not repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 33,672.”

NHTSA complaint #11699207, filed 2025-11, 33,672 miles

“The contact owned a 2021 BMW 330i. The contact received notification of NHTSA Campaign Number: 26V056000 (Electrical System); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer exceeded a reasonable amount of time for the recall repair. The contact stated that while driving approximately 45 MPH, there was smoke coming from under the passenger side fender. The contact entered a nearby parking lot off the highway when the vehicle caught fire. …”

NHTSA complaint #11731768, filed 2026-04, 49,000 miles

Related recalls

Related service bulletins

Electrical system: other model years

YearComplaintsShare of year
2025117%
2024233%
2022117%
20211345%
20202038%
2019717%
2018413%
2017410%
20063416%
2005311%
2004109%
20031013%
2002716%
20011513%

Other parts of the 2021 BMW 330I

Engine
8 complaintsOther or unknown
5 complaintsAir bags
4 complaintsForward collision avoidance
3 complaintsLane departure
2 complaintsSuspension
2 complaintsBrakes
1 complaintsEngine cooling
1 complaintsBody and structure
1 complaintsTransmission and drivetrain
1 complaintsVisibility (wipers, defrost, mirrors)
1 complaintsWheels
1 complaints

← All problems reported for the 2021 BMW 330I

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