Check Engine Light and/or Engine Overheating on BMW X3

Problem Description and Possible Solution

The thermostat may fail resulting in engine overheating and/or illumination of the Check Engine Light. Replacement of the thermostat along with a complete inspection of the cooling system will be necessary to correct this concern.

Overheating can cause severe engine damage. If the engine begins to overheat it is recommended to stop at the first available location and have your vehicle towed to a repair shop.

Problem Data
RepairPal Verified
Average mileage: 73,520 (11,600–130,000)
3 model years affected: 2004, 2005, 2006
14 people reported this problem
Viewing 1 - 3 of 3 comments
my engine service light is on and will not go out. I dont have any overheating or leaks that i have noticed but i reset it and in a day or so the light comes back on.
Check engine light, code is for open T-stat circuit.
high temp warning light came on while driving short distance (about 5 miles) then went down to normal. Check engine light came on after about a week of this. $1,200 repair at BMW dealership. Thermostat, coolant pipes all needed to be replaced. Disappointed with first BMW purchase; second coolant issue with it in six months.