BMW 325i Check Engine Light and/or Engine Overheating
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.
Car was over heating so I bought a new water pump and thermostat on eBay for $400, followed the instructions on YouTube and managed to fix the problem myself. - Visitor
Amber temp light illuminated. Then went off. It came on again 10 minutes later and quickly changed to red. After cooling, took it to closest mechanic (2 mi) for a quick look. Had towed to BMW mechanic. Determined to be electric water pump and/or thermostat. Told have to remove water pump to get to thermostat so might as well replace both. - Visitor
My thermostat needle was moving from even to hot (H) up and down as i drove. it stayed on hot for a few mins or until i stopped the car and turned off ignition and when i turned it back on it was fine. thought it was the thermostat sticking. It was fine for about a month and a half. Then started getting hot one day out of the blue. Once again the needle was not still for too long. This time went from H to C and back to H. Then finally overheated and turned off about 10 mins right when i got to a place i could pull over. We let it cool down and saw that it was out of water. We put water in it. It started and was fine for about 10 miles then overheated again. Pulled over again and filled up the radiator this time to the top. But car would not start back up. At the shop now. - Visitor
Same problem as another customer. The amber temp light came on, quickly turning to red. Took to mechanic and at first he could not find the problem. Took back and he determined that the thermostat was stuck and needed replacing. I don't have the car yet, so I hope that the new thermostat will solve the problem. - Visitor
Overheat while driving on I15 south with outside temperature of 79. - Visitor
Overheating light only comes on when its cold outside. If you cut the car off it and wait a few minutes it stays off?
Then today one of the hoses blew off and I had it towed to the repair shop. - Visitor
Temp light flashed, then red, as I attempted to pull off freeway radiator busted - Visitor
thermostat failed causing check engine light. replaced thermostat - navydark1
I had to have the thermostat, water pump, and coolant extension tank replaced all at the same time. - Visitor
thermostat light came on, let car cool, and than low coolant light came on. - Visitor
The automatic transmission will not operate into reverse. - Visitor
Thermostat was already replaced at an earlier date when my check engine light trouble started. After a very expensive part replacement related to the exhaust, I found the light was still coming on. That repair was not needed. The real culprit was a fuze that went up. - Visitor
sensor light came on. Put coolant in the tank, it came on again. Havent taken it to the dealer yet. Not looking forward to this. - Visitor
Thermostat failure. Engine overheated. Likely will need to replace thermostat as well as water pump. $950 repair in total - Visitor
CEL came on all of sudden after just purchasing thank GOD for a warranty - Visitor
Failure of thermostat. 1st diagnosis due to illogical temp readings on cool/cold mornings. Second diagnosis by Tech at BMW dealer. Simple replacement was quite expensive. - Visitor
I did not have a problem, but just after purchase, my mechanic said this item was a BMW recall, so he fixed it before it became a problem. - mryflynn1
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