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Other or unknownPart report

2021 BMW 330I Other or unknown Problems

Complaints
5about this part
Share
17%of 29 total for the year
Median mileage
—not reported
Trend
Not enough dataFewer than 15 complaints, too few for a reliable trend.

NHTSA recorded 5 complaints about the other or unknown of the 2021 BMW 330I, 17% of the 29 complaints for this model year. 1 a fire, according to the filers.

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

“While driving approximately 70 mph on the highway, my vehicle’s sunroof suddenly and violently shattered without any warning. There was no impact from debris, no vehicle in front of me throwing objects, and no prior damage to the glass. The explosion was extremely loud, resembling a gunshot. The sunroof glass appeared to burst outward and then collapse inward, sending broken glass downward. Thankfully, my vehicle has a canvas sunshade beneath the sunroof, which was closed at the time. The sunshade prevented glass from falling directly onto me and my passenger. …”

NHTSA complaint #11718178, filed 2026-02

“I just became aware from Consumer Reports about an upcoming recall on BMWs because of a potential fire hazard with the engine starter relays. I own a 2021 BMW 330i which is one of the models listed. I entered my VIN on the NHTSA and BMW websites and both sites indicated my vehicle has no open recalls. According to NHTSA, BMW will start notifying owners on November 14 about the recall. In the Consumer Reports article and several other articles I read about the recall, owners are being directed to park their vehicles outside and away from buildings and other vehicles. …”

NHTSA complaint #11690249, filed 2025-09

“My car has ver been wrecked or received any damage to any part of it. While driving to work the following warning popped up on screen. RESTRAINT SYSTEM WARNING, functionality of the airbags, seatbelt tensions, belt force limits reduced.”

NHTSA complaint #11641504, filed 2025-02

“This BMW vehicle's odometer readings are inconsistent and inaccurate resulting in overage of mileage for lessee. This cars BMW tires were not verifiable to be from BMW and tires subsequently failed within 15,000 miles. No entity at BMW, not the dealership, not the sales, not BMW Financial Services or BMW of North America LLC could provide any information regarding the original tires or provide any warranty information regarding the tires - this impact mileage efficiency, miles per gallon and is a way to game the systems. …”

NHTSA complaint #11603482, filed 2024-07

Related service bulletins

Other or unknown: other model years

YearComplaintsShare of year
2024350%
2022117%
2021517%
2020713%
2019922%
2018619%
20171126%
200663%
200514%
200422%
200323%
200165%

Other parts of the 2021 BMW 330I

Electrical system
13 complaints
Engine
8 complaints
Air bags
4 complaints
Forward collision avoidance
3 complaints
Lane departure
2 complaints
Suspension
2 complaints
Brakes
1 complaints
Engine cooling
1 complaints
Body and structure
1 complaints
Transmission and drivetrain
1 complaints
Visibility (wipers, defrost, mirrors)
1 complaints
Wheels
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