2018 BMW 320I Problems
Owner-reported complaints filed with NHTSA, grouped by component
Data refreshed
What this page shows
Everything below is an owner-reported complaint submitted to NHTSA about the 2018 BMW 320I, grouped by the component NHTSA recorded on the report. These are not confirmed defects, and they are not recalls. NHTSA does not verify most reports before publishing them, and a category with more reports in it is not evidence that a part is defective.
Complaints are reports submitted by owners and drivers to NHTSA. They are not verified and do not establish that a defect exists.
Reports by component
Ranked by how many owner reports name each component category
- Electrical721.2%
- Fuel system515.2%
- Engine515.2%
- Airbags412.1%
- Driver assistance39.1%
- Brakes39.1%
- Powertrain (other)39.1%
- Interior & seats13.0%
- Other / unspecified13.0%
- Steering13.0%
Percentages are of component mentions. A single complaint can name more than one component, so these do not sum to the total complaint count.
Each component in detail
What the reports in each category say, in the owners' own words
Electrical
Reports naming the electrical system — wiring, battery, charging, control modules, infotainment and electrical accessories.
From owner reports, verbatim
The electrical call system malfunctions. I’ve done extensive research and actually confirmed with Garret today at A&L BMW that there is a problem in the manufacturing of the shark fin. The gasket that BMW uses does not hole up and the sealant does not keep water from leaking into the fin. Every time it rains/snows or the vehicle is wet the system malfunctions. Currently it only has the ability to affect me if I were in a wreck and won’t notify emergency services. This has the ability to shut down all electrical functions in my car and has been a common issue in BMW dating back as far as 2015. I called them in April to have it looked at, but I didn’t understand the problem and it had ceased. But since the weather has now began to be more frequently wet, this problem has become more persistent. Now they won’t cover because the final warranty expired in December of 2023. This should be recalled because it is a manufacturing issue.
Rattling noise we’ll driving and when going over 30 mph can lose control
Too few reports in this category for a page of its own — they appear in the full complaint list.
Fuel system
Reports naming fuel storage or delivery — tanks, pumps, lines, injectors and fuel leaks.
From owner reports, verbatim
The contact owns a 2018 BMW 320I. The contact stated that while driving 55 MPH, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The message Engine coolant system, coolant pump outside of speed tolerance" and code 20A701 was displayed. The contact stated that the vehicle failed to accelerate, and the contact drove 8 MPH back to the residence. A fuel-burning odor was on the interior and exterior of the vehicle. The vehicle was not taken to the dealer or an independent mechanic. The contact stated that on a separate occasion, while her husband was driving, the failure reoccurred. The contact's husband arrived at the residence and became aware that the water pump had failed and was no longer functioning as intended. Upon further investigation, the contact related the failure to NHTSA Campaign Number: 21V907000 (FUEL SYSTEM, DIESEL). However, the VIN was not included. The vehicle was not repaired and was parked at the residence. The manufacturer was made aware of the failure and referred the contact to the NHSTA Hotline for assistance. The failure mileage was approximately 84,000.
• What component or system failed or malfunctioned, and is it available for inspection upon request? The plastic fuel tank failed and developed a leak. Yes, the tank is available for inspection upon request. • How was your safety or the safety of others put at risk? A leaking fuel tank poses a serious fire and explosion hazard, especially when the vehicle is operating or parked near heat sources. Gasoline fumes were noticeable, creating an increased risk of ignition and exposure to toxic vapors. • Has the problem been reproduced or confirmed by a dealer or independent service center? Yes. The problem was confirmed by an independent mechanic, who verified the leak in the fuel tank. • Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? The vehicle has not yet been inspected by BMW or other officials. Only an independent mechanic has inspected it so far. • Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? Yes. A check engine light appeared shortly before the failure. In addition, a strong smell of gasoline was noticed, followed by visible leaking fuel. There is an open recall on the BMW F30 BMW 320i, production date 2013 to 2018, production dates July 02, 2012 to March 23, 2018 for the “plastic fuel tank.” I own a 2018 BMW 320i, manufactured April 2018 which is not included in the recall for the “plastic fuel tank.” However, I noticed a gasoline smell and the fuel tank is leaking. Upon further research, inspection and after notifying a mechanic, the fuel tank for my vehicle is the exact same one as the plastic fuel tank indicated in the BMW recall. My production date is a week later than the recall production date, but the fuel tank is the same exact fuel tank that has been recalled. The vehicle has developed a serious safety defect in the plastic fuel tank, which is leaking gasoline and emitting fumes.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Engine
Reports naming the engine itself — including stalling, misfires, oil consumption, cooling and internal engine components.
From owner reports, verbatim
Was simply driving my vehicle to work. It started overheating parked it right away before it got worse as the car alerted had it towed to a shop. The shop informed me that the motor was blown in the pistons went through the motor something with the oil the mechanic and I were looking further into this and it looks like my make and model in year had some recalls about the motor overheating in the past so I would really like this looked into as this might be a recall I’m not sure what else this could be or why this would happen with such low miles
Rattling noise we’ll driving and when going over 30 mph can lose control
Too few reports in this category for a page of its own — they appear in the full complaint list.
Airbags
Reports naming the air-bag system — deployment behaviour, inflators, sensors and warning lights.
From owner reports, verbatim
On 09/16/25, I was exiting the Florida turnpike onto Sawgrass Highway via the exit ramp on exit 71. As I decelerated from 60 MPH to 35 MPH to match the speed of the exit ramp, I was in the left most lane in the two-lane exit ramp. My car spun out and I lost control of the vehicle, which caused the vehicle to spin through the two lanes of the ramp several times and ended up drifting onto the edge of the retention pond on the left of the exit ramp. I probably had spun around over three times and my car hung off the edge of the retention pond with the only thing preventing my car from falling into the pond being the rocks to prevent erosion on the side of the pond. The airbags on the drivers side and the curtain airbags both had deployed upon the car coming to a stop. The seatbelts were also locked upon trying to exit the car. The car was fully serviced prior to the incident and in good standing with BMW. The brakes were recently replaced a month ago and regular milestone inspections were conducted on the car. The road conditions on the day in question were great with no water or puddles on the road.
My passenger airbag sensor malfunctioned and the repair is over two thousand dollars. The car is only 6 years old and I believe airbags should last longer than 6 years. BMW has extended warranties for airbags on some models (mine not included) for 15 years without mileage limitation. If a collision occurs, my passenger would be in extreme danger.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Driver assistance
Reports naming forward-collision avoidance, lane keeping, back-over prevention, cruise control and related electronic driver-assistance systems.
From owner reports, verbatim
VEHICLE HAD 300 MILES ON IT. ALL POWER WENT OUT IN THE VEHICLE INCLUDING THE STEERING GOING STRAIGHT 45MPH WITH MY SMALL CHILD IN THE CAR. ALMOST DIED, BUT WAS ABLE TO CONTROL CAR TO GET IT TO THE SIDE OF THE ROAD ALMOST GETTING HIT HEAD ON. CALLED BMW FROM WITHIN THE CAR AND WENT LATER THAT DAY TO GET A LOANER. I REFUSED TO TAKE BACK CAR DUE TO SAFETY ISSUES. AFTER A WEEK OF THEM "FIXING" IT THEY TOLD ME THAT IT WAS A MAIN CONTROL PANEL FOR THE FUEL PUMP THAT WENT OUT. I DO SEE THROUGH WHEN CHECKING RECALLS FOR 2018 BMWS THAT THERE WAS ONE ISSUED FOR A PUMP, BUT NOT UNTIL SEPTEMBER 2018. THIS HAPPENED TO ME IN MARCH OF 2018, SO IF IT IS THE SAME ISSUE THE RECALL SHOULD BE SHORTENED.
ACCELERATION ISSUES. I COMPLAINED TO BMW ABOUT THE ISSUE NOVEMBER 2018 FOR MY 2018 BMW. HOWEVER, BMW SAID THERE WASN'T A PROBLEM. ON SUNDAY AT AROUND 6:28 PM I WAS PULLING INTO A PARKING SPACE AT MY CHASE BANK AND THE CAR SUDDENLY STARTS ACCELERATING CAUSING ME TO HAVE A HEAD ON COLLISION WITH A PARKED CAR. MY 2015 BMW HAD THE SAME PROBLEM. I WAS IN RALPH'S PARKING LOT IN BEVERLY HILLS ABOUT TO PULL OUT WHEN SUDDENLY MY BMW ACCELERATED, AND I NEARLY KILLED TWO PEOPLE. WHEN I BOUGHT IT IN FOR SERVICE BMW REPAIRED THE PROBLEM. SOMETHING WAS CALIBRATED TO HIGH.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Brakes
Reports naming service brakes, the antilock braking system, brake hoses, master cylinders or the parking brake.
From owner reports, verbatim
The contact owns a 2018 BMW 320I. The contact stated that while the vehicle was parked, the vehicle unexpectedly started rolling forward. The brake pedal was depressed; however, the brakes failed to immediately respond. The contact stated that the vehicle eventually came to a stop. The contact referenced an unknown recall for the failure, but the VIN was not under recall. The vehicle was driven to an independent mechanic but was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 72,000.
On 09/16/25, I was exiting the Florida turnpike onto Sawgrass Highway via the exit ramp on exit 71. As I decelerated from 60 MPH to 35 MPH to match the speed of the exit ramp, I was in the left most lane in the two-lane exit ramp. My car spun out and I lost control of the vehicle, which caused the vehicle to spin through the two lanes of the ramp several times and ended up drifting onto the edge of the retention pond on the left of the exit ramp. I probably had spun around over three times and my car hung off the edge of the retention pond with the only thing preventing my car from falling into the pond being the rocks to prevent erosion on the side of the pond. The airbags on the drivers side and the curtain airbags both had deployed upon the car coming to a stop. The seatbelts were also locked upon trying to exit the car. The car was fully serviced prior to the incident and in good standing with BMW. The brakes were recently replaced a month ago and regular milestone inspections were conducted on the car. The road conditions on the day in question were great with no water or puddles on the road.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Powertrain (other)
Powertrain reports that are not specifically the engine or transmission — driveshafts, axles, transfer cases and differentials.
From owner reports, verbatim
The contact owns a 2018 BMW 320I. The contact stated that while the vehicle was parked, the vehicle unexpectedly started rolling forward. The brake pedal was depressed; however, the brakes failed to immediately respond. The contact stated that the vehicle eventually came to a stop. The contact referenced an unknown recall for the failure, but the VIN was not under recall. The vehicle was driven to an independent mechanic but was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 72,000.
My 2018 bmw 320 stalls and cuts off when I come to a stop. Very dangerous. It has cut off in the middle of the road. I have checked online to see if this is a common issue. Other bmw owners have reported this same issue. There has been a recall on other bmw models with this same issue from 2014-2018 for fuel system and fuel pump that may cause this issue. Letters were sent out I. January of 2022. My 2018 bmw 320si has not been included in this recall for some odd reason. When car shuts off a warning message appears on screen. One message states “transmission not in park.” Or “drivetrain malfunction”. This began to happen on November 2022. I have taken my vehicle to two dealers. One was an independent repair shop and the other was a bmw service center. Both reported issues with fuel pump that would cause this problem.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Interior & seats
Reports naming seats, latches, locks, linkages and interior fittings.
From owner reports, verbatim
I was driving to home, Nobody is traveling with me. Suddenly SRS System gave me a warning that "Restraint System Malfunction" .I went to the dealer he diagnosed and told that. Passenger Seat Occupancy sensor failure, that will prevent the deployment of Airbags. The vehicle mileage is less than 34k. They fixed and charged me for $1958.71.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Other / unspecified
Reports whose component NHTSA recorded as unknown, or that do not map to one of the categories above.
From owner reports, verbatim
After tightening the harness, the straps slip and loosen completely on their own without pressing the release button. This happens due to normal movement while driving, leaving my child completely unrestrained and unprotected. I have already followed the manufacturer guidelines to thoroughly clean the adjuster mechanism and the strap area with warm water to rule out any debris or buildup. While it seems to hold for a brief period, the mechanical failure returns after a couple of days.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Steering
Reports naming the steering system — racks, columns, power-steering assist and steering linkage.
From owner reports, verbatim
On 09/16/25, I was exiting the Florida turnpike onto Sawgrass Highway via the exit ramp on exit 71. As I decelerated from 60 MPH to 35 MPH to match the speed of the exit ramp, I was in the left most lane in the two-lane exit ramp. My car spun out and I lost control of the vehicle, which caused the vehicle to spin through the two lanes of the ramp several times and ended up drifting onto the edge of the retention pond on the left of the exit ramp. I probably had spun around over three times and my car hung off the edge of the retention pond with the only thing preventing my car from falling into the pond being the rocks to prevent erosion on the side of the pond. The airbags on the drivers side and the curtain airbags both had deployed upon the car coming to a stop. The seatbelts were also locked upon trying to exit the car. The car was fully serviced prior to the incident and in good standing with BMW. The brakes were recently replaced a month ago and regular milestone inspections were conducted on the car. The road conditions on the day in question were great with no water or puddles on the road.
Too few reports in this category for a page of its own — they appear in the full complaint list.
Higher-selling and older vehicles accumulate more reports. Counts are not failure rates and are not directly comparable between vehicles that sold in very different numbers.
Elsewhere on this vehicle
Data sources
- NHTSA Office of Defects Investigation — owner-reported complaints and the components recorded on them
Data on this page last refreshed .