Check Engine Light and/or Engine Overheating on BMW X3

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.

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Average mileage: 73,520 (11,600–130,000)
3 model years affected: 2004, 2005, 2006
9 people reported this problem
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problem details
2004 BMW X3 130,000 mi,
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.
2005 BMW X3 60,000 mi,
Check engine light, code is for open T-stat circuit.
2006 BMW X3 76,000 mi,
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.