2019 BMW X3 Electrical System Problems

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.

The vehicle's Telematics Control Box (TCB), located beneath the roof-mounted shark fin antenna, failed due to water intrusion and internal corrosion. The failure produced the following fault codes confirmed by BMW of Norwood, MA: B7F341 (backup battery hardware defective), B7F33C (internal ECU error), and B7F327 (microphone short circuit to ground), along with cascading faults across multiple other vehicle modules. Symptoms included a persistent 'Emergency Call System Malfunction' warning on the instrument cluster, loss of GPS/navigation accuracy, and loss of odometer display. The shark fin antenna base seal — a foam tape and adhesive system — had likely deteriorated after approximately 6-7 years of service, consistent with a pattern of failures reported by numerous other owners of 2017-2023 BMW X1, X3, X4, X5, X6, X7, M440i, M550i, 330, 340i, and 750i vehicles. BMW dealer quoted $3,300 for repair. An independent BMW specialist quoted $3,500. BMW North America declined to cover the repair as the vehicle is out of warranty, despite acknowledging the issue as known. This failure mode is the subject of active class action litigation (Craft v. BMW of North America LLC, Case No. 1:24-cv-06826, U.S. District Court for the District of New Jersey) and an ongoing investigation by Sauder Schelkopf LLC on behalf of affected owners. SAFETY CONCERN: The failure disables the Intelligent Emergency Call system, which automatically contacts emergency services in the event of a serious accident. Additionally, the persistent warning obscures the instrument cluster including the odometer display, impairing normal vehicle operation. Water intrusion reaching vehicle electronics represents a broader safety risk if it propagates to safety-critical modules. ACTION REQUESTED: Formal investigation into the adequacy of the shark fin antenna sealing design across affected model years, and consideration of a recall or extended warranty to cover TCB replacement costs for affected owners.

My 2019 BMW X3 (G01 chassis) displays a persistent "Emergency Call System Malfunction" warning on the instrument cluster that cannot be dismissed or reset by the owner. The warning appears every time the vehicle is started and remains on the dashboard throughout operation. This is a known defect caused by failure of the Telematics Communication Box (TCB) module, which is commonly triggered by water intrusion through a defective seal on the roof-mounted shark fin antenna housing. BMW has acknowledged this issue through Technical Service Bulletin SIB B65 12 22 (Roof-Mounted Antenna Housing Seal Not Adhering), yet has not issued a recall or offered a no-cost repair to affected owners. This defect presents the following safety concerns: 1. The persistent, non-dismissible warning light desensitizes the driver to critical dashboard warnings, undermining the purpose of the vehicle's warning system. When drivers are conditioned to ignore a permanent warning, they are more likely to overlook new, actionable safety alerts. 2. The emergency call (eCall) system itself is rendered non-functional, meaning the vehicle will not automatically contact emergency services in the event of a serious collision where the driver is incapacitated. 3. The warning creates a visual distraction on the instrument cluster during driving. BMW's only offered remedy is full replacement of the TCB module at a cost of 1,500â“2,500 to the owner, despite this being a manufacturing defect (faulty antenna seal adhesive) and not a wear item. The defective component is located under the headliner and is not accessible for owner maintenance. This issue is widespread across 2017â“2023 BMW models equipped with the shark fin antenna, including the X3, X4, X5, X6, X7, 3 Series, and 5 Series. A class action lawsuit has been filed against BMW of North America regarding this defect. Numerous complaints have been submitted to NHTSA and documented extensively on BMW owner forums. I am requesting that NHTSA

The contact owns a 2019 BMW X3. The contact stated that while driving at an undisclosed speed, the instrument panel was flickering on and off. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure but provided no assistance. The contact was referred to the NHTSA Hotline to report the failure. The failure mileage was approximately 80,000.

Today, I placed my backpack containing my 2019 BMW X3 key fob in the back seat, closed the door, and proceeded to open the driver’s door as usual. Immediately, the car locked itself with the key fob still inside. This is a failure of the anti-lockout safety system. The vehicle’s Comfort Access/keyless entry system is designed to prevent the doors from locking when the key is inside, and it should never lock itself under these circumstances. This malfunction creates a serious safety risk, as occupants or pets could become trapped inside the vehicle. I am submitting this complaint to notify NHTSA of a potential safety defect in the BMW anti-lockout / Comfort Access system. I request an investigation to determine if this defect affects other vehicles of the same model and year.

The contact owns a 2019 BMW X3. The contact stated that while driving at an undisclosed speed, the instrument was flickering on and off. The contact stated that the failure was persistent. The vehicle was not diagnosed or repaired by an independent mechanic or the dealer. The manufacturer was made aware of the failure but provided no assistance. The contact was advised to contact the NHTSA Hotline to report the failure. The failure mileage was approximately 60,000.

Beginning in July–August 2025, my 2019 BMW X3 (VIN [XXX] ) began experiencing multiple safety‑critical system failures affecting federally regulated components. The rearview camera intermittently failed to activate and later stopped functioning entirely, resulting in loss of rear visibility required under FMVSS 111. The Emergency Call (eCall) system displayed repeated malfunction warnings, indicating loss of automatic crash notification capability. The vehicle also displayed “Driver Assistance Restricted,” “Collision Warning Malfunction,” and pedestrian detection failure messages, showing that forward collision warning and related ADAS functions were not operating properly. During the same period, the telematics control unit (TCU) lost functionality. This caused loss of ConnectedDrive services, backend communication, remote diagnostics, remote status reporting, and safety‑related over‑the‑air updates. These failures match known BMW defect patterns involving water intrusion into the antenna/telematics module and backend provisioning issues. I submitted a detailed written escalation to BMW of North America. BMW issued two brief responses on February 11–12, 2026 that did not address any of the safety issues, did not provide the engineering basis for excluding my VIN from the applicable recall, and redirected me to a dealer, which has no authority over recall determinations. BMW closed the case without providing any investigation results, defect determination, or technical explanation, contrary to obligations under 49 CFR § 573. These failures materially impair federally regulated safety functions, including rear visibility, collision avoidance, emergency crash notification, and telematics‑based safety communication. The pattern suggests a potential broader defect affecting additional vehicles. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My X3 has 52,000 miles. During a recent road trip, an "Emergency Call System Malfunction" message appeared. When I returned home, I took the vehicle to the dealership. The advisor said the shark fin trim is loose on the roof causing water ingress into the vehicle causing damage to the aerial antenna and the TCB unit. The TCB unit is also known as the Telematics Control Unit that is responsible for vehicle safety and connectivity features, door locking mechanisms, and so on. The technician found faults in the aerial antenna and TCB. I understand from the service advisor that they see this fairly regularly. I have further learned that BMW issued a Service Information Bulletin admitting the problem to dealers and telling them it was a manufacturing defect during the painting process and lists the parts needed to fix it. The quoted cost to replace the damaged components and install/seal a new shark fin was over $4,000 (almost 10% of the car's original price). BMW knows this to be a problem and I think there should be a safety recall for it, regardless of whether the car is out of its original warranty period.

Regarding SIB 65 12 22, NHTSA ID Number 10227571, Manufacturer Communication Number B651222. Summary: The seal of the roof-mounted antenna housing is separating from the vehicle. Affected Products: (20) Vehicle BMW X3 2018-2022 - BMW X4 2019-2022 - BMW X5 2019-2022 - BMW X6 2020-2022 - BMW X7 2019-2022 I would like to mention that, this issue was known by BMW and acknowledge as Painting Process Deffect, BMW havent release a recall. BMW released on oct 2022 a BMW Service Information Bulletin detailing a defect in the paint and sealant of the roof-mounted antenna housing, which can allow water to leak into the vehicle and damage electrical components, including the emergency call system and GPS. Vehicles produced before January 10, 2022, are affected. The bulletin provides instructions for dealers to inspect for water ingress, remove the affected antenna housing, inspect the paint for separation on the sealing surface, and replace the housing if the paint is separating. Even when this production deffect main consequence is the damage of the Telematics Control Unit (tcu) due to physical closeness and consequently failure of the vehicle’s emergency call system and other communication systems and gps. The bulletin only focus on replace of antenna and painting of area (approx cost $700) and doesnt mention any alternatives for solution to damaged TCU (approx cost $3000) and on top the solution mentioned is even more restricted to Coverage under the terms of the BMW New Vehicle Limited Warranty for Passenger Cars and Light Trucks. Please, respectfully request you to consider reviewing this situation due to affects 20 models and a considerable big amount of people.

Shark Fin antenna water ingress causing Emergency Call Malfunction. Known issue with BMW and no warranty or recall due to failed seal allowing water to ingress into the Telematics Control Module disabling all cell service, hands free communication and tracking/navigation in case of an accident vehicle does not provide accurate location. Cost of repair is 3,000-5,000 due to water damage. Warnings come onto instrument cluster that can be removed and blocks mileage or any other settings to be viewed including cruise control settings

I began to receive an “emergency call malfunction” notification on my vehicle. I took it in to be serviced and received this text when I was due to pick up my vehicle “Good morning! Okay, and as far as the TCB we were talking about for the emergency call malfunction.. It looks like there is water coming in through the antenna there (the shark fin, with that being said we would have to replace the shark fin, the tcb and the tcb battery, which is not cheap, out the door that alone is $3,178 installed.. --Kenndehl Swanson Classic BMW MINI” I researched and noticed there was a class action filed with NHTSA against BMW for this very issue for X3’s from 2017-2023. I would like my vehicle to be included in this class action lawsuit. BMW has stated that they were aware in the lawsuit. [XXX] INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The seal of the roof-mounted antenna housing adhesive was faulty. This caused separating from the vehicle allowing water into the vehicle, which damaged emergency call components and equipment. BMW told me this was a know issue, but that NHTSA had not yet applied this to my vehicle. Please issue an advisory on this known issue. My car is under 40,000 miles and fairly new still. Adhesive should not be deteriorating this early. Preventative maintenance could not have addressed this factory issue. - Excerpt from BMW inspection: Concern Critical Client States Emergency Call Malfunction On. Aux Battery Replaced Twice. Ref Ro 871625 And Ro 907864. Please Check And Advise Cause FOUND SHARK FIN COVER GLUE TO BE LOOSE AND TO HAVE A SLOW WATER LEAK. WATER DAMAGED TCB MODULE. NO COMMUNICATION WITH TCB MODULE. Correction REPLACE TCB MODULE. REPLACE ROOF ANTENNA. REPLACE SHARK FIN. PROGRAM AND ENCODE TCB MODULE Cost: $2,8550.50

Emergency Call System Malfunction warning message showed up on dashboard. Got it diagnosed at a BMW Dealer and they said there is a leak with the sharkfin antenna that allowed water to seep in and short the telematics control unit. Quoted $2500 by BMW to replace and reseal antenna. In the event of an accident and the driver becomes unresponsive, the vehicle won’t automatically call emergency services since. With this malfunction, my GOS, Bluetooth microphone, and BMW app all do not work. Also can’t get my emissions done because the warning message is blocking the odometer. Contacted BMW North America to investigate and they contacted the dealer saying they can’t do anything about it. Honestly worried to drive the car especially in the winter, if I go off the road or something else and become unresponsive emergency services will not be called.

The contact owns a 2019 BMW X3. The contact stated while driving 30 MPH, the emergency call system malfunction message was displayed on the instrument panel. The contact also stated that the Bluetooth microphone failed to function. Additionally, the SOS button failed to engage while being depressed. The dealer was contacted. The vehicle was taken to the dealer where it was diagnosed and determined that the telematics system needed to be replaced. The vehicle was not repaired. The dealer provided the contact and estimate for the repair. The contact related the failure to TECHNICAL SERVICE BULLENTIN: SI B65 12 22 (ROOF-MOUNTED ANTENNA HOUSING SEAL NOT ADHERING); however, the VIN was not included in the TSB. The manufacturer was not notified of the failure. The approximate failure mileage was 62,900.

The contact owns a 2019 BMW X3. The contact stated that upon starting the vehicle, the message "Emergency Call System Notification Failure" was displayed on the instrument cluster, causing the speedometer and the odometer to become inoperable. The service warning light was illuminated. Additionally, the contact stated that the navigation system was inoperable, and the vehicle function setting on the infotainment system also indicated that the Emergency Call System Notification had failed. The vehicle was taken to the dealer, where it was diagnosed that the TBC module and battery had failed due to water intrusion in the shark fin of the roof. The dealer determined that the TBC module and the TBC module battery needed to be replaced. Additionally, the dealer informed the contact that the shark fin needed to be resealed. The vehicle was not repaired due to the cost. The manufacturer was notified of the failure and informed the contact that the repair could not be covered because the vehicle was out of warranty. The failure mileage was approximately 62,000.

My 2019 BMW X3 posted this error on the instrument display "Emergency call system malfunction". BMW service informed me that the shark fin roof mounted antenna is leaking. It causes issues with the SOS feature, navigation (reporting wrong location). There are numerous complaints on BMW owners message boards with the same problem. There is at least one BMW Service Information Bulletin (SIB) that applies to this issue for my vehicle. It is number B65 12 22. I was told this issue is not covered under my certified pre-owned warranty. This is a safety issue affecting thousands of BMW owners. BMW should do the right thing, issue a recall on the affected models and repair this problem. Thank you.

The contact owns a 2019 BMW X3. The contact stated that the Navigation system had become inoperable. Additionally, the message "Emergency Call Malfunction" was displayed. The vehicle was taken to the dealer, where it was determined that the seal of the roof-mounted antenna housing had separated from the vehicle, causing water to leak into the antenna housing wiring and causing the electrical failures. The contact was charged a fee for the repair. The vehicle was not repaired due to the cost. The contact related the failure to Technical Service Bulletin Number: SIB 65 12 22. The manufacturer was notified of the failure and a case was opened. The contact was awaiting an email from the manufacturer. The failure mileage was approximately 85,000.

A faulty seal in the "fin" allowed for water to penetrate and short out the module responsible for the emergency SOS call system and the navigation. This was confirmed by BMW technicians and a known problem. This resulted in an indicator and message that would not go away and a malfunction of the emergency SOS system that would not work in the event of an accident. Navigation was also rendered useless by this module board malfunction. Resulting replacement cost exceeded $1700.

Headlights flash on and off for no apparent reason which is distracting to other drivers both in front of me or approaching my vehicle. This happens all of time now most recently for no apparent reason but I first noticed it more than a year ago. Headlights also go on and off and start to self level multiple times after car has been turned off. This has happend on a number of occasions as well. Normally the rotary light switch is always set in the AUTO position in my car. I have also noticed it happen when the car in parked and off, which can drain the battery.

The TCB Module and Antenna failed due to a water leak through the sealed roof mounted "Shark Fin" Antenna on top of my vehicle. The vehicle is not completely safe to drive due to the failure of the TCB Module in which the Module activates the "Intelligent Emergency Call" in the case of an accident. Crash and airbag sensors activate an emergency call to the BMW call center in the process, a set of relevant data such as how many passengers and their presumed condition or injury as well as the exact position of the my vehicle is sent automatically to the BMW call center and the nearest emergency service provider. The problem has been inspected and confirmed by my local BMW dealer. There is a warning on my odometer that states "Emergency call system not available."