2021 BMW 330I Engine cooling Problems
- Complaints
- 1about this part
- Share
- 3%of 29 total for the year
- Median mileage
- 30,000miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 1 complaints about the engine cooling of the 2021 BMW 330I, 3% of the 29 complaints for this model year. Where a mileage was given, the median is 30,000 miles. 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.
“The contact owns a 2021 BMW 330I. The contact stated while driving 50 MPH and coming to a stop at a red traffic light, the contact started smelling smoke. There was no warning light illuminated. The contact turned off the vehicle, but the vehicle failed to restart with a message that the vehicle was unable to be restarted displayed. The contact turned on the hazard lights with the vehicle stopped in the middle of the road. The contact then noticed that there was smoke coming from the front end of the vehicle and immediately called 911. …”
NHTSA complaint #11700817, filed 2025-11, 30,000 milesRelated service bulletins
- 10252038Mar 4, 2024Check Control message (CCM) indicates: (ID 213): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 - Starter…
- 10245365Nov 13, 2023Pressure control valve (pcv) extended ltd wty 15 years/150,000 miles
- 10245367Nov 9, 2023Check Control message (CCM) indicates: (ID 213): Stop, exercising due care. Voltage supply The Service Engine Soon light is on with the following DME Fault Code: 21B209 - Starter…
- 10242688Aug 1, 2023?A software error may cause an unwanted pressure pulsation in the transmission during a "Remote Engine Start."
- 10236218Apr 1, 2023In hot ambient conditions, if the engine was running for a prolonged time while the vehicle is stationary, a jolt may be experienced while lightly accelerating.
- 10235179Mar 1, 2023There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32 F (0 C) or lower.
- 10233157Feb 1, 2023There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32 F (0 C) or lower. The…
- 10230726Dec 1, 2022There is a howling or whistling noise from under the vehicle at 30 -37 mph (50 -60 km/h) when driving after a cold start, when the outside temperature is 32F (0C) or lower.
- 10225122Sep 1, 2022On these Plug-in Hybrid Electric Vehicles (PHEV), the air conditioning cycles from cold to warm air while driving or while at a standstill. A rattling noise may also be heard…
- 10218378Jun 1, 2022A rattling/droning noise is heard in the vehicle interior when the air conditioning (AC) is activated. Vibrations are felt in the driver's footwell.
Engine cooling: other model years
Other parts of the 2021 BMW 330I
13 complaintsEngine
8 complaintsOther or unknown
5 complaintsAir bags
4 complaintsForward collision avoidance
3 complaintsLane departure
2 complaintsSuspension
2 complaintsBrakes
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 27, 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