Four problems related to water pump have been reported for the 2007 BMW X3. The most recently reported issues are listed below.
White driving on the highway at a speed of 65 mph the engine lost power and stopped. After to the vehicle was stopped and started again the heater was no longer working. Took in for the repair, was told it was a water pump. $1600 repair 6 weeks ago. Last night 1/1/2020 while driving on the same highway all the lights began blinking and the engine ceased again with the indicator lights showing a transmission error.
While driving on interstate 72 in illinois, we noted a low coolant level light. Checked the owner's manual, and it stated that this was not a major issue, but we should check it at the next opportunity. Coincidentally, the other party we were traveling with asked if we wanted to stop for coffee at a location 1. 5 miles off the interstate. When we stopped, the low coolant light went off. Before getting back on the road, noticed that coolant was dripping from the front right side of the engine. A repair facility was nearby, and they investigated the leak and determined that it was emanating from a crack in the water pump. Also determined that the cause of the crack was the engine sagging. Further investigation determined that a lower engine mounting bolt was missing entirely. This was replaced along with the water pump, when the engine was jacked back into proper position. At this point it was discovered that the upper mounting bolts had sheared off inside the engine. This is a serious issue. We were one mounting bolt away from the engine sagging excessively, likely causing drive train seizure.
4 motor mount bolts were sheered. Took to dealership due to coolant leak and found that engine had become unmounted and was sitting on water pump that was cracked and causing the leak. I had noticed vibration but was not sure what it was. Over $2000 repair bill. This seems to be a common problem with this model BMW.
Low coolant light came on, and BMW dealer found a crack on the water pump. Upon further inspection, the engine was noted to be canted, making it impossible to attach the new water pump. It was discovered that the engine mount bolts (total of 4 on one side) had all broken off, causing the engine to tilt. The repair was $2000 and when I called BMW USA, they said that there would be no compensation back to me, and that the broken bolts were secondary to the car having 90,000 miles. Changing bolts is not a normal wear and replacement item, and the car has never been in an accident. Our vehicles are gently driven, and never go off road, so I am mystified how this happened.