The contact owns a 2012 BMW 528XI. The contact stated that while driving at an undisclosed speed, the vehicle came to a stop and the Automatic START/STOP feature activated; however, the engine failed to restart. The message "Drive Train Malfunction Error" was displayed. The vehicle was towed to the dealer, who determined that the timing chain had fractured, causing unknown parts to enter the engine. The contact was informed that the timing chain needed to be replaced. The vehicle was not repaired. The contact associated the failure with NHTSA Campaign Number: 23V707000 (Engine and Engine Cooling); however, the VIN was not included in the recall. The manufacturer was made aware of the failure. The failure mileage was approximately 119,000.
NHTSA complaint #11758059 — an unverified report by a vehicle owner.
I am submitting this report to notify the National Highway Traffic Safety Administration of a safety‑related defect involving the BMW N20/N26 engine timing chain assembly. My vehicle experienced a sudden and complete engine failure at highway speed due to a timing chain malfunction. This failure occurred without warning and created an immediate safety hazard for my [XXX] son, who was driving at the time. Loss of engine power at speed eliminated the ability to accelerate, maintain speed, or safely maneuver, exposing him and surrounding motorists to significant risk. This issue is not an isolated incident. BMW has issued internal service bulletins acknowledging premature timing chain wear and failure in N20/N26 engines. Independent technicians, consumer forums, and numerous owners have documented identical failures, often occurring well before the expected service life of the timing chain. The nature of the defect—catastrophic engine failure without warning—presents a clear safety concern rather than normal mechanical wear. BMW has declined to provide assistance, stating that “there is nothing we can do,” despite the well‑documented history of this defect and its safety implications. The failure of a known defective component at highway speed is foreseeable, preventable, and materially compromises vehicle safety. I am requesting that NHTSA investigate this recurring timing chain defect in BMW N20/N26 engines, including: The frequency of sudden engine failures Whether BMW’s internal documentation reflects awareness of a systemic safety issue Whether the defect warrants a recall or other corrective action to prevent further incidents This failure placed a young driver in a dangerous situation and could easily result in collisions, injuries, or fatalities. I am submitting this report to help ensure that other drivers are not exposed to the same risk. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)
NHTSA complaint #11753542 — an unverified report by a vehicle owner.
The vehicle suffered a sudden Drivetrain Malfunction and severe engine overheating while driving, resulting in a physically snapped camshaft and extensive iron shaving contamination in the oil pan (catastrophic engine failure).Ten months ago, an authorized dealership performed the official BMW Water Pump Safety Recall (NHTSA Campaign 24V608000). The vehicle has an active history of drivetrain malfunction fault codes dating back to January 2024. The failure of the recall remedy to safely maintain the cooling loop directly caused severe thermal stress and lubrication breakdown, leading to the camshaft fracturing. Additionally, this engine was under the VANOS Bolt Safety Recall (NHTSA Campaign 23V707000), which covers loosening valvetrain bolts known to break camshafts.This is a direct consequential safety failure resulting from defective recall components, causing sudden engine failure while operating on a public roadway. Vehicle is currently held at Fields BMW awaiting corporate inspection.
NHTSA complaint #11748598 — an unverified report by a vehicle owner.
The contact owns a 2012 BMW 528XI. The contact stated that while driving at various speeds, there was a misfire coming from the engine with the "Drivetrain Malfunction" message displayed. The contact later received a notification for an unknown recall, and a diagnostic test was performed however, no failure was found for the drivetrain. The recall repair was performed. Recently, the contact stated that the vehicle would shut off soon after it was started. The vehicle was taken to an independent mechanic where a diagnostic was performed; the diagnostic test discovered that the camshaft sensor was fractured, and metal shavings were found in the oil pan. The vehicle was then diagnosed with engine failure. The manufacturer was notified of the failure. The vehicle was not repaired. The failure mileage was approximately 128,900
NHTSA complaint #11745553 — an unverified report by a vehicle owner.
The contact owns a 2012 BMW 528XI. The vehicle was previously repaired under NHTSA Campaign Number: 24V608000 (ENGINE AND ENGINE COOLING, ELECTRICAL SYSTEM), but the failure occurred. The contact stated that while driving at an undisclosed speed, the check coolant level warning light illuminated. The vehicle was taken to the dealer. The contact was informed that the recall repair was not yet available. However, the dealer installed a splash seal. The contact notified the manufacturer of the issue, and was referred to contact another dealer since parts for the recall repair were available. The vehicle was taken to a different dealer where the remedy was available, and the contact was informed that the recall was already completed. The vehicle was not repaired. The contact stated that the failure persisted. Most recently, there was smoke coming from the exhaust pipe, and the vehicle vibrated while driving. The vehicle was not taken to the dealer or an independent mechanic. The vehicle was not repaired. The manufacturer was made aware of the issues, and the contact was referred to the local dealer. The contact stated that the dealer had committed fraud since the manufacturer paid for the recall to be completed. Prior to the failure, the contact had replaced the headlamp. The vehicle was taken to the dealer for maintenance, and afterwards, the vehicle was washed, and water entered the headlight and damaged the sensor. The failure mileage was approximately 155,000
NHTSA complaint #11715380 — an unverified report by a vehicle owner.
My 2013 BMW 528i was serviced under recall 24V-608 (Coolant Pump Electrical Connector / DME). After the recall was marked complete, the car developed several serious failures: Coolant Pump / Connector (Recall Item) – The dealer refused to replace the coolant pump even though the recall notice from the government includes both the pump and connector. Shortly after, the water pump failed completely, causing “High Temperature” warnings and putting me at risk of sudden overheating and breakdown on the road. DME (Engine Control Unit) – This was supposedly updated during the recall, but it failed to detect existing problems. Before the recall, I was never warned about issues with the turbo or oil leaks. Immediately after the recall update, the car started misfiring and showing drivetrain malfunction. The recall did not prevent or detect the failures as promised. Valve Cover Gasket (Oil Leak) – After the recall, a severe valve cover oil leak appeared, causing lean air/fuel mixture, misfires, and risk of fire. Oil leaking onto engine components is a known safety hazard. The dealer admitted the gasket leak existed but refused to cover it. Turbocharger / Wastegate – The DME flagged turbo wastegate actuator problems after the recall. The turbo cannot be ordered separately from the actuator, leading to very expensive repairs. Before the recall update, this issue was not visible, so I believe the recall software either failed to detect earlier or triggered worse conditions. Because of these combined failures, the car became unsafe to drive: misfires caused loss of power, overheating warnings increased risk of sudden engine shutdown, and the oil leak created a fire hazard. An independent mechanic later confirmed the water pump failure and valve cover gasket leak, which I had to repair at my own expense. I believe the recall defect (coolant pump connector / DME) caused or contributed to the damage of the water pump, gasket, and turbocharger. BMW and the dealer refused to rep
NHTSA complaint #11685652 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528XI. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA complaint #11662067 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528XI. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was contacted and confirmed that parts were not yet available. The manufacturer was made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA complaint #11657270 — an unverified report by a vehicle owner.
The timing chain became stretched so that the valve timing with the pistons had been altered so that a valve face almost hit the top of a piston(one more tooth on the intake camshaft gear would have caused an impact between the piston top and a valve face causing the motor to stall and cease operation thereby causing the vehicle to lose power and possibly control). A timing chain should not stretch so as to cause a strike between a valve face and the top of a piston. Either the timing chain was of inferior quality or the automatic tensioner was inadequate to take up the slack as the chain wore.
NHTSA complaint #11656692 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528I. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted and confirmed that parts were not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA complaint #11656086 — an unverified report by a vehicle owner.
The contact owns a 2012 BMW 528XI. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); and the vehicle was taken to the dealer for the recall repair. The contact was informed that the recall repair had been performed. The contact stated that upon driving off the parking lot at the dealer and coming to a complete stop at the traffic light, the message "Drive Train Malfunction - Service to Nearest BMW Dealer as Convenient" was displayed. Additionally, the vehicle was significantly sluggish and failed to respond upon depressing the accelerator pedal. The vehicle was taken back to the dealer, where the contact was informed that the failure could be related to the coolant pump, and the part was not covered under the recall; however, the recall remedy information stated that the dealer would inspect and replace the water pump and plug connector as necessary, and would install a protective shield, free of charge. The vehicle was not repaired. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 129,000.
NHTSA complaint #11654514 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528XI. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System); however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA complaint #11651116 — an unverified report by a vehicle owner.
-Drivetrain warning message was displayed, indicated to drive moderately, and moments later car sputtered and ceased to operate. Mechanic inspected and reported the timing chain failed and is to blame. Also, the engine may be impacted due to fraying parts that may have entered engine values over the course of time. Vehicle may be available for inspection for a short period of time (sold car to mechanic for very nominal amount). -My teenage daughter was driving the car when the above occurred and broke down on a busy highway. Thankfully, she avoided a collision. The police were called and the car towed. This could have been extremely harmful to both my daughter and the general public. -An independent mechanic diagnosed the issue and confirmed the issue. -The vehicle was not inspected by the manufacturer, police, or insurance. The manufacturer (BMW) did perform an extensive evaluation and repair of the coolant line approximately two months ago but did not mention this issue. -I believe the drivetrain warning displayed once or twice with a message to drive moderately. On recollection, this was after the visit to fix the coolant issue. -We purchased the car new in 2013, were the only owners, and I expected much more from BMW. We are very upset given the potential harm that could have occurred. Also, I have since read about a class action lawsuit impacting this very same issue and pertaining to our year, make, and model. We were not informed of this lawsuit, nor did we receive a recall notice for the defective timing chains in these models. I took a substantial loss on this vehicle as compared to its FMV had this not occurred.
NHTSA complaint #11637700 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528i. The contact received notification of NHTSA Campaign Number: 24V608000 (Engine and Engine Cooling, Electrical System) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was not made aware of the issue. The contact had not experienced a failure. VIN tool confirms parts not available.
NHTSA complaint #11637329 — an unverified report by a vehicle owner.
The contact owns a 2013 BMW 528XI. The contact stated that while driving at an undisclosed speed, the vehicle stalled with the check engine warning light illuminated. The vehicle was not able to be restarted and was towed to a local dealer. The local dealer diagnosed the vehicle with a failure with the timing chain. The vehicle was not repaired. The contact related the failure with an unknown Customer Satisfaction Program; however, the contact had not received the notification letter. The manufacturer was made aware of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 191,000.
NHTSA complaint #11601563 — an unverified report by a vehicle owner.
BMW 528i xdrive purchased new in 2013. Currently has 103k miles. While driving on hi-way at 65 mph, received "low oil pressure" alarm on instrument panel. Pulled on hi-way, engine shut-down. Initial diagnosis by local mechanic is timing chain failure. Have read COUNTLESS blogs about this being a recurring problem with the plastic timing chain degrading, 90% leading to complete engine failure - repair of which far exceeds value of car. Went to BMW dealership which didn't even bother to read the CLASS ACTION reports I presented. They had done some service work a year or so ago with no mention that this is a rather common issue. Said they would repair at my cost and that's all they can do. Ridiculous the lack of OWNERSHIP and responsibility that BMW is taking. Hopefully if enough people report BMW's behavior, an oversight agency will have enough stroke to force BMW to deal with this.
NHTSA complaint #11542241 — an unverified report by a vehicle owner.
Car gave a Drivetrain Malfunction error and I was able to get the car to the mechanic I've used on the car since it was purchased. I was informed this week that there is now debris in the oil from the timing chain.
NHTSA complaint #11540095 — an unverified report by a vehicle owner.