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: 85,766 (11,600–147,000)
3 model years affected: 2004, 2005, 2006
10 people reported this problem
4 people shared problem details
2004 BMW X3130,000
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 X360,000
Check engine light, code is for open T-stat circuit.
2004 BMW X3147,000
Check engine light came on around 147,000 miles, no leaks from what I can tell and not overheating. However, I do have to press on the gas a bit harder to accelerate. I took it in to see what the light was for and I was told thermostat heating circuit. I'm taking it to the shop soon to get more information.
2006 BMW X376,000
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.
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