Replace coolant temp sensor

[8565]

Hi all, di i need to do anything when i replace my coolant temp sensor or just took it out n replace the new sensor.

[Grrrmachine]

You need to test the current one first, at the ECU, before you remove anything, otherwise you risk introducing more faults by messing with the wiring.

http://www.e30zone.net/e30zonewiki/inde ... or#Testing

[8565]

My current one that still is fitted on the engine is broken. so i brought a new. di i need to check the ECU or the new sensor.

[Grrrmachine]

If you're sure it's broken then just swap it over.

[Brianmoooore]

You will lose a small amount of coolant while swapping them over, so that will need to be checked/topped up. There's also a small chance (if you don't work fast enough) that you will introduce air into the engine, and the cooling system will need bleeding afterwards.

[8565]

i fitted a used 320i coolant temp sensor on it. But it won't start, just got crank. But if i connected the sensor socket with a wire it start .