2018 BMW 330I Other or unknown Problems
- Complaints
- 6about this part
- Share
- 19%of 32 total for the year
- Median mileage
- 15miles
- Trend
- Not enough dataFewer than 15 complaints, too few for a reliable trend.
NHTSA recorded 6 complaints about the other or unknown of the 2018 BMW 330I, 19% of the 32 complaints for this model year. Where a mileage was given, the median is 15 miles.
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.
“When rear windows are down, there is a loud reverberating roaring sound that that increases w speed and is very distracting to driver. It is a recurring problem on 330I even ones before 2018. Bmw service manager say it is a design defect.”
NHTSA complaint #11352902, filed 2020-09, 15 miles“My 330i 2018 bmw has a cracked in the oil housing unit. This is due to bmw putting plastic parts instead of aluminum. After researching this I found thousand of people complaining about the sane thing. The car overheats and sometimes the oil gets mixed into the coolsnt system b causes more damage. This seems to happen on cars with mileage between 60-70 on engines B46, B48 n B58z”
NHTSA complaint #11655822, filed 2025-04“Car coolant is leaking due to a bad plastic coolant vent line. I had this issue in January 2023 where it was covered under a recall. I tried contacting the bmw dealership who fixed this recall and they stated there was no current recall. Although is the same issue again.”
NHTSA complaint #11608828, filed 2024-08“Multiple codes came on right after I had gotten my thermostat and my water pump fixed. However it ended up being that there was more leaks throughout the rest of the car. The car has currently cost me $3400 to fix and it’s still not fixed because nobody can figure out where the actual leak is coming from. The coolant is leaking and nobody can figure out where, it’s been having jerking issues since it started leaking and I read on other Bmw’s that the coolant leaks into the head gasket, causing the engine to blow”
NHTSA complaint #11569599, filed 2024-02“The coolant system and oil housing filters. The entire coolant system components fails in this vehicle after 60,000 mile due to the parts not being all aluminum. This fix alone is about 8k from the BMW Dealership. This isn’t fair to the customer! This needs to be a recall! The parts needs to be more stronger and never replaced with the same manufacturer part! This fails the entire engine system! The car will have multiple issues just because of this constant failing area of the vehicle!”
NHTSA complaint #11715764, filed 2026-02Related service bulletins
- 10227568Oct 1, 2022According to the customer, the airbag warning light was on, but it may not be illuminated when the vehicle arrives in the workshop. 1. ACSM fault code "930A60 - Seat occupancy…
- 10225128Sep 1, 2022Due to a production error, the telematics control units were delivered without an IMS configuration.
- 10200249Jun 1, 2021The discontinuation of 3G cellular communication for Combox, TCB 3G and ATM 3G (Telematics ControlModule) can no longer be supported by the cellular network provider starting…
Other or unknown: other model years
| Year | Complaints | Share of year |
|---|---|---|
| 2024 | 3 | 50% |
| 2022 | 1 | 17% |
| 2021 | 5 | 17% |
| 2020 | 7 | 13% |
| 2019 | 9 | 22% |
| 2018 | 6 | 19% |
| 2017 | 11 | 26% |
| 2006 | 6 | 3% |
| 2005 | 1 | 4% |
| 2004 | 2 | 2% |
| 2003 | 2 | 3% |
| 2001 | 6 | 5% |
Other parts of the 2018 BMW 330I
12 complaintsFuel system
5 complaintsElectrical system
4 complaintsEngine cooling
2 complaintsVehicle speed control
2 complaintsBrakes
1 complaintsForward collision avoidance
1 complaintsSeat belts
1 complaintsSteering
1 complaintsBody and structure
1 complaintsTires
1 complaintsTransmission and drivetrain
1 complaints
← All problems reported for the 2018 BMW 330I
About this data. Data from NHTSA (ODI) complaints, recalls, TSBs and investigations, updated Oct 30, 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