2019 BMW X3

UNKNOWN cause. while driving approximately 45–55 mph, the vehicle experienced a sudden and unexpected braking event and engine shut down. •The vehicle automatically came to an abrupt, complete stop. •The engine shut off and then immediately restarted automatically. •A “Service Rear Pads” warning appeared after the vehicle auto-restarted. The vehicle did not gradually slow down; it suddenly and forcefully braked to a complete stop and shut down completely. This was a serious and potentially dangerous safety event as an unexpected stop/shut down event at 45–55 mph could have created a significant risk of collision. We contacted the BMW service center and scheduled a diagnostic appointment for June 22. During the June service visit, the dealership performed: diagnostics, rear brakes and rotors replacement, A/C recharge, tire rotation and balance, and oil change/service. Following the June service, we began experiencing new and intermittent symptoms that had not been present before, including: Ticking, metal clanking, new road/tire noise, Changes in vehicle dynamics and overall driving feel, other intermittent noises. On July 21, we contacted BMW to report the new intermittent noises and changes following the June service and requested an appointment to have these concerns evaluated. An appointment was scheduled for July 24. The July MPI identified several concerns that differed substantially from the June MPI, including: Rear differential leak, worn motor mounts, low battery concerns, & uneven tire wear and cracking. We also observed a permanent brake-pad imprint on a new rotor. These discrepancies raised additional questions and we were told by the SM that the technician had “missed” them in June, even though he documented as good. We refused to accept the X3 back for now d/t safety concerns, and we notified BMW of North America for investigation. The cause for the critical shut down event remains unknown. How can Flow BMW assure it's safe to drive?

**Description of Incident** On **July 25, 2026**, I parked my 2019 BMW X3 xDrive30i in a parking lot and turned the engine off. The vehicle was shifted into Park, locked, and I walked into a nearby store. At approximately 6:41 p.m., I received the update on my phone confirming that my vehicle had been locked. I remained inside the store for approximately six minutes. My purchase transaction was completed at approximately 6:47 p.m., at which time I immediately exited the store. When I returned to the parking lot, I found my vehicle fully engulfed in flames, not merely smoking. The fire had developed rapidly during the brief period the vehicle was parked and unattended. Prior to parking the vehicle, it had been operating normally. There were no warning lights illuminated on the instrument panel, including no check engine light, no engine overheating warning, no temperature warnings, and no other indications of a mechanical or electrical problem. The vehicle was not overdue for scheduled maintenance, and I had no reason to believe there was any issue that would place the vehicle at risk of catching fire. The vehicle was completely destroyed by the fire, which also spread to nearby parked vehicles. Based on the absence of any warning signs and the fact that the fire occurred while the vehicle was parked with the engine turned off for only a few minutes, I am requesting that this incident be investigated to determine whether it may have resulted from a vehicle defect.

I bought my 2019 BMW X3 late 2025 before Christmas. The Carfax was fine and there were no open recalls on the vehicle. The vehicle had been serviced regularly at BMW facilities. Our family mechanic looked at the vehicle before I bought it and performed some basic diagnostics. The vehicle appeared fine. There were no error codes and all of the fluids were topped off. I don't know if the issues with the coolant were there before I purchased the vehicle or if they happened afterwards. There were no warning lights and everything looked good. This car is garage kept and is used a couple of times a week. I did my research on the internet and took my car in for an oil change at a highly-rated independent auto repair facility that specializes in European vehicles and are famous for providing dealership-level expertise, ASE-certified with factory trained technicians from Germany. On March 5th, 2026, when I went to pick up my car, they told me the bad news that is a well known manufacturer defect within the industry regarding these vehicles. They used plastic components in the engine compartment and in the cooling system, which makes the vehicles malfunction. From their report, with pictures, they state the following repairs need to be made, "During the vehicle inspection noticed active coolant leaks are present from multiple locations. The radiator plastic tank actively leaking coolant. The water pump change over valve leaking coolant. The turbocharger coolant line has a coolant crud build up . Oil filter housing and coolant flange on the cylinder block are discolored. For proper cooling system repair recommend complete update of the cooling system. Both balance shaft end caps leaking oil. Recommend replacement during cooling system update." They quoted me $8,914.86 for this repair. That's over HALF the value of the vehicle. They said the entire system needs to be replaced because ALL of the plastic parts in Florida's hot sun will fail. Sudden coolant failures in FL = DEATH.

I am submitting this complaint regarding a serious mechanical and safety issue involving my 2019 BMW X3. On or around January 21, 2024, while driving from my home, a warning signal suddenly appeared on my dashboard related to the vehicle’s cooling system/engine. Due to safety concerns, I pulled into a nearby Wawa parking lot, which was the safest available place to stop at the time. I turned the vehicle off and waited approximately 15 minutes before carefully driving the vehicle back home. After inspection and diagnosis, I was informed that the vehicle required extensive repairs, including an engine replacement and cooling system repairs. At the time the coolant warning appeared, the replacement engine reportedly had approximately 59 miles on it. I believe a sudden engine or cooling system malfunction while operating a vehicle presents a serious safety concern for drivers, passengers, and others on the roadway. In addition, I experienced issues involving the shark fin antenna on the vehicle, which I understand may be connected to broader complaints involving BMW vehicles. I am requesting that NHTSA review this matter to determine whether these issues may indicate a broader defect or safety-related concern affecting other consumers. I am willing to provide supporting documentation including repair invoices, dealership records, photographs, and any additional information requested. Thank you for your attention to this matter and for your commitment to vehicle safety.

My 2019 BMW X3 equipped with a B46 engine developed a significant coolant leak at approximately 80,000 miles. The vehicle displayed a low coolant warning, and coolant was visibly leaking underneath the vehicle. Around the same time, I began noticing excessive white exhaust/steam during cold starts and, for the first time since owning the vehicle, had to add engine oil between scheduled oil changes. The vehicle is currently undergoing inspection by an independent repair facility. Preliminary findings indicate concerns involving premature failure of critical plastic cooling system and/or oil filter housing components. Based on my research, these failures appear consistent with widespread complaints involving BMW B46/B48 engine cooling system and oil filter housing defects. I am concerned this defect could lead to sudden coolant loss, overheating, engine failure, or unsafe driving conditions. Prior to the coolant warning appearing, there were no significant alerts indicating a major or imminent cooling system failure. The apparent failure of critical plastic engine cooling components under normal driving conditions raises serious concerns regarding the durability and safety of these parts. I have photographs documenting the coolant leak, as well as detailed notes and diagnostic information from the repair facility, available upon request. The vehicle is available for inspection.

Our 2019 BMW X3 M40i shows "EMERGENCY CALL SYSTEM MALFUNCTION" which means the "SOS" system, which is crucial for post-collision response, fails. Erhardt BMW in Bloomfield Hills, Michigan confirmed water leakage due to defective sealing around the roof-mounted shark fin antenna damaged the Telematics Control Box (TCB) and now requires replacement. The estimated cost is $3,600. Some quick research revealed this to be a repeated problem with my vehicle. BMW has acknowledged it as a defect in 2017-2023 model year BMW M440i, M550i, X1, X3, X4, X5, X6, X7, 330, 340i and 750i vehicles and fix it at no cost, but only for citizens of [XXX] , as reported by [XXX] of [XXX] . For details, see: [XXX] . This seems unfair to non [XXX] residents like me [XXX] ). INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I am reporting a water intrusion issue in my 2019 BMW X3 involving both the roof-mounted “shark fin” antenna and the sunroof. Water enters the vehicle during normal rain conditions and has caused failure of the emergency call (SOS) system. This presents a serious safety concern, as the emergency communication system may not function in the event of a crash or emergency. Water intrusion also creates a risk of electrical damage and potential malfunction of critical vehicle systems while driving. The vehicle has been properly maintained, and this issue appears to be related to known defects involving water leaks from roof components in BMW vehicles. The total repair cost to address these issues is $4,650.

While driving down the highway at about 60 mph, the vehicle made a loud noise like a gunshot, and the sunroof exploded. Fragments of glass fell from the sunroof onto the backseat and floor board and large chunks of glass fell after. There was not any indication that the sunroof was damaged prior to failure and there were no other cars around that could have caused a rock or other debris to fly up and hit the sunroof. Fragments of glass could have injured the driver and the noise startled the driver and could have caused a wreck.

On returning to my locked vehicle that had been in the parking ramp for 3 days, I started the car and the display message indicated that my vehicle was completely out of gas and the oil was very low. The vehicle had nearly a full tank of gas when it was parked. The vehicle was towed to the dealership who assessed the vehicle. The service department indicated that the vehicle likely did not sound like it was running because of the idle feature, and as such, I may have thought I shut off the car, but that eventually the idle feature turned off, and the vehicle ran while it was locked until it was out of gas. The service man who sent me a video of my vehicle and described what happened, also showed me another BMW SUV in the hoist next to my vehicle and indicated that same vehicle had the same thing happen as well. BMW replaced the programing/encoding control units software that was original to the vehicle. They indicated that this would improve overall function of the vehicle. The cost of this replacement was $371. This sounds like a design flaw. How can a locked vehicle start back up after a period of time, by itself with no vehicle fob in the vicinity, and run for hours until it is out of gas and the oil is low?