2018 BMW 3 Series
Problems, recalls and owner-reported issues
Engine is the leading concern among 59 owner complaints filed for this model year. This is the 13th highest complaint count among 21 3 Series model years with reports.
Of the 2018 reports, 5 involved a crash and 4 involved a fire. 4 people were injured.
What owners report most often
Recalls and investigations
No safety recalls on file.
Representative owner complaints: fuel/propulsion system
10 reports, newest first. Show all
Power train, Fuel/propulsion system, Jun 29, 2025
Car just shut off when driving at 65mph and never started back up, took it in and repair was a bad fuel pump and fuel rail line causing metal shards to go through fuel tank and injectors.
Fuel/propulsion system, Nov 22, 2024
Coolant fluid exits from the expansion tank into the overflow leaving no fluid in the expansion tank. Then it causes and overflow/steam to burst out of the overflow tank. Then the coolant is low notification comes on which warrants to replace the coolant fluid. Took it to a few BMW dealers. They've did a flush, replace expansion tank, and water pump, also tested the pressure several times at 2 different BMW dealerships. I leave the dealership broker and with the same problem starting again within that week. This has been a constant issue which never seems to be fixed by any BMW dealer.
Fuel/propulsion system, Nov 12, 2024
Gas tank began leaking from top of blind flange, similar to other extended warranties (SIB 01 03 22 and SIB 01 07 22). BMW is refusing to cover my specific model year (I have sent letters requesting reimbursement and called multiple times). It created an explosion hazard in my garage. Had mechanic repair, I do not have part. Cost $2,000 for new tank that will probably develop same issue. There were no warning lamps.
Power train, Fuel/propulsion system, Aug 7, 2024
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.
Fuel/propulsion system, May 6, 2024
My 2018 BMW 330i has the same problem that the recall for the fuel sensor level on 2018 BMW M5! I broke down on the side of the interstate and had it towed to BMW and they said it was the fuel sensor reading more than it should and wanted to charge almost 3,000 to fix it. There are similarities to the other recalls and my vehicle should also be included in that recall. I had to pay 300.00 just for them looking at it. I found it odd the sensor would do that and my investigation has brought me here. There was no warning and I was stranded on the interstate
Fuel/propulsion system, Apr 22, 2023
Fuel Tank Filler Hose Collapse - unable to refuel and vehicle remains stranded.
Engine, Fuel/propulsion system, Dec 13, 2022, fire
On January 19, 2022 I was driving and then smoked filled inside my car and the outside engine was smoking and a light came on that said check coolant. BMW service took me in that day and they said my coolant broke. They removed it and replaced it. They did not understand how the coolant broke but I paid for the service and parts and moved forward. On November 25, 2022 I went into the same BMW service center to get a routine car service and they stated there was a recall and they would replace my coolant for free. (After I told them I paid for it ($699.63) . They insisted I replace it for free again and reach out to BMW corporate for a reimbursement of previous service. I received a call yesterday stating they would not replace it and reach out and file a report with NHTA.
Fuel/propulsion system, Aug 16, 2022
In Feb 2022 my vehicle reported low coolant and later the engine overheating. At one point the accelerator pedal became less effective and the car significantly slowed down while on the highway. After refilling the car's engine coolant and still getting alerts, I brought the vehicle to the BMW auto shop where it was determined there was an active coolant leak from the hose of the cylinder head expansion tank. The hose was then replaced. Today I visited the same BMW auto shop where they reported an open recall on this exact issue, yet I do not see an open recall on this site. Please investigate as others may be having this faulty equipment safety issue with risk of engine overheating/fire.
Other or unspecified, Fuel/propulsion system, Jan 11, 2020
CAR MAKING A EXPLOSIVE, CRANKING MECHANICAL NOISE UPON UNLOCKING THE CAR BEFORE YOU EVEN OPEN THE DOOR. THERE SEEMS TO BE A FUEL PUMP MAKING NOISE FROM INSIDE A GAS TANK. BMW AUTHORIZED DEALERS ACKNOWLEDGED THE NOISE IS ASSOCIATED WITH A "HIGH PRESSURE FUEL PUMP" AND REFER TO THIS AS "NORMAL" I BELIEVE THE FUEL DELIVERY SYSTEM IN THIS CAR AND OTHER SIMILAR MODELS ARE THE RESULT OF DEFECTIVE COMPONENT(S) AND/OR A RESULT OF A FLAWED ENGINEERING. THIS NOISE HOWEVER CONTINUES ON WITH A HUMMING/BUZZING SOUNDS FOR SEVERAL MINUTES WHICH ALSO EFFECTS THE CAR'S OVERALL PERFORMANCE WHICH SEEMS TO BE CAUSING THE CAR TO PERFORM AT A DIMINISHED LEVEL OVERALL WHICH MAY OR MAY NOT AFFECT VEHICLE'S OVERALL SAFETY COMPONENTS SUCH AS BRAKES AND OTHER CONTROL APPARATUS. AT TIMES, UPON UNLOCKING THE CAR, IT FEELS AND VERY WELL SOUNDS LIKE THE VEHICLE IS ABOUT TO EXPLODE?! AND THIS BY ITSELF CAUSING A GRAVE CONCERN AND I FEEL THAT IT MUST BE INVESTIGATED, ESPECIALLY THAT BMW HAS BEEN RELUCTANT/UNABLE TO REPAIR DESPITE REPEATED 8 ATTEMPTS WITH CAR BEING IN SERVICE FOR OVER 30 DAYS. THIS CAR IS STILL UNDER MANUFACTURER'S WARRANTY. ALL REPAIR ORDERS HAVE BEEN DONE AT BMW AUTHORIZED DEALERSHIP. ALL REPAIR ORDER DOCUMENTS AS WELL AS A SHORT 15 SECONDS VIDEO CLIP ARE AVAILABLE UPON REQUEST.
Fuel/propulsion system, Sep 18, 2019
CAR WAS IN MOTION ON A STREET. ENGINE STALLED. CAR WOULDN'T START. TOWED TO BMW DEALERSHIP. CATASTROPHIC HIGH PRESSURE FUEL PUMP FAILURE AT APPROXIMATELY 7400 MILES. METAL SHAVINGS THROUGHOUT ENTIRE FUEL SYSTEM. INJECTORS, FUEL LINES, FUEL PUMP, AND FUEL TANK NEEDED TO BE REPLACED.