2018 BMW 3 Series UNKNOWN OR OTHER
Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.
Complaint Timeline
Chronological view of owner reports
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.
Cylinder Head Hose Expansion Tank Replacement - Coolant leaks out completely - This repair has been done twice on this vehicle with only 26K miles. BMW USA states no recall but the dealership informed me they have issued a bulletin but just put back on the defective hose since no other replacement hose is available...I'm paying out of pocket for the repair.
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.
Trend Over Time
Complaints by year
Other Issues
Common problems reported
Quick Summary
The 2018 BMW 3 Series has 3 UNKNOWN OR OTHER complaints on file. Review the timeline above for detailed owner experiences.