2018 BMW X3

The sunroof drains of the vehicle become easily clogged. When this happens, water drains into the battery compartment and interior of the vehicle. Although BMW is aware of this, and the attendant danger of having water pooling in the battery compartment, they have not addressed the issue. There are no warning lamps, messages or other symptoms prior to the problem.

NHTSA ID

11731138

Incident

Aug 1, 2023

While driving on the interstate lost coolant through the oil cooler housing. I had to quickly get to the shoulder of the road having to cross several lanes of traffic. The car had to be towed. I had it towed to the dealership where I purchased it as I paid for an extended warranty. Warranty company denied the claim. Through research I am finding this is an issue with BMWs as they part is plastic and does not stand up well with the temperature changes it is subjected to. This needs to be a recall. The car is still in the shop, 45 days later. Approximate cost to repair $2,840.00 plus tax.

NHTSA ID

11730148

Incident

Feb 21, 2026

BMW installed a part that is failing quite a number of vehicles including this vehicle. The oil filter housing was not properly constructed at the factory. Fails.

NHTSA ID

11721034

Incident

Jan 6, 2026

Oil pump failure due to plastic brittle materials failing prematurely. It is a common problem that is well documented across the owners that have this vehicle.

NHTSA ID

11721022

Incident

Jan 1, 2026

Vehicle lost coolant and warned me to pull over because of the engine overheating. Later was diagnosed with a leaking oil filter housing. Simply too early for such a component to fail. Left my wife stranded miles away from home in the snow.

NHTSA ID

11717167

Incident

Feb 3, 2026

This problem has occurred to me now twice. Both occurrences were on very cold days where the temperature was below 20 degrees F. The car starts promptly and runs, but the entire dashboard electronic instrument cluster is non-functioning and dark . In this condition, you cannot tell your speed, engine rpm, fuel level, engine temperature, or any mileage numbers. The turn signals also do not work. The headlights and the iDrive screen and the climate control were all lit properly and functioned. I did not think to check the brake or tailights, unfortunately. Multiple restarts of the car had no effect, and so I drove home without the dash functions. After the car sat overnight in my garage (which is somewhat warmer) the dash lights returned to their proper function.

NHTSA ID

11708423

Incident

Dec 31, 2025

The Front Passenger Seat Occupancy Sensor Mat (CIS) in my 2018 BMW X3 failed at 56,000 miles. This failure is confirmed by the specific BMW fault code 930A1C (Seat Occupancy Detector Malfunction) stored in the Advanced Crash Safety Module (ACSM). The component is currently installed in the vehicle and available for inspection. This defect poses a severe safety risk: the system fails to consistently detect a seated front passenger. As a result, the passenger airbag may be disabled and fail to deploy in a collision, significantly increasing the risk of injury or death. The dashboard displays a "Passenger Restraint System" malfunction warning, accompanied by an airbag light and chime. The issue is intermittent and load-dependent. It triggers specifically when an adult passenger occupies the seat for extended periods (e.g., highway driving), indicating a physical fatigue failure of the sensor mat grid under compression. I diagnosed the fault using BMW factory-level diagnostics. However, both the local BMW dealership and BMW North America have refused to cover the diagnosis or repair under the existing warranty extension (SIB 72 01 25) for this exact component, stating my specific VIN is excluded despite the vehicle exhibiting the known safety defect.

NHTSA ID

11706711

Incident

Dec 23, 2025

Part number 17127799184 keeps melting. Over the years I have had multiple components under the hood to melt. I’ve replaced hydraulic lines, coolant reservoirs you name it. Most recently part number 17127799184 keeps melting. I’ve replaced this part three times. My car is currently at Bloomfield hill bmw of Michigan. They did a diagnostic but it states they cannot definitively tell me what’s causing the issue. They advise I start with replacing the heating module but cannot guarantee it will resolve the issue. They stated my car is producing no symptoms. I contacted the corporate office with hopes they would assist with a good will service request. However it appears not only do they not stand behind their products but apparently bmw’s are only meant to last 4-5 years. When questioned if it’s normal for components to continuously melt under the hood he agreed it is not. However refused to offer an equitable solution considering the issues I’ve had over the years and their mechanics currently not being able to state 100 percent what’s wrong with the automobile. When I told him my mother drove a Volvo for 20 years are you saying in 7 years parts on a car should melt? He didn’t offer a response wished me a happy holiday and concluded the call.

NHTSA ID

11706065

Incident

Jan 3, 2023

The NVLD limited emissionrelated warranty for defects in materials or workmanship has been extended to 15 years/150,000 miles as determined from the original in-service date.

The EVAP systems purge (vent) valve limited warranty for defects in materials or workmanship has been extended to 15 years / 150,000 miles as determined from the original in-service date.

The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in-service / first delivery date.

A situation may occur where the front passenger seat is not occupied. However, a “fasten seat belt” warning and a front passenger seat air bag deactivation message appears. If the situation is currently present, sit in the seat and move the seat to a slightly different position. The POL (Passenger Occupancy Light) light should now function correctly. Copyright ©2025 BMW of North America, Inc. 5/12/25, 11:11 AM 72 03 25_G01/G02 FALSE ALERT RF SEAT OCCUPIED W BELT UNBUCKLED-EXTENDED LIMITED WARRANTY about:blank 1/9 In some cases, the Air bag Warning Light was illuminated, and the following Advanced Crash Safety Module (ACSM) fault is stored: 930A1C - Front passenger seat occupancy detection transmitting fault (moisture)

The vehicle applies the brakes on its own when reversing onto an inclined roadway or driveway. This appliesonly to the situation where the Active PDC option is activated via the iDrive.

The Supplemental Restraint Systems (SRS) Front Passenger’s Seat Occupancy Capacitive Interior Sensor (CIS) Mat for defects in materials and/or workmanship that causes a false seat occupancy alert to occur has been extended to 10 years / 120,000 miles as determined from the vehicle's original in-service / first delivery date.