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Posted on Jan 02, 2017
Yes it is that easy. It should be a 4 pin connector located on the transmission side of the engine head in a plastic flange. Best is to wait for the engine to be cold. Unscew the radiator cap to relieve pressure but screw it right back on. On the 2.0L engines when you unclip the coolant sensor little or not coolant loss will happen if you do this. Just unplug it, pull out the clip, pull out the sensor, and the seal which sometimes stays stuck. Install the new sensor with a new seal lubricated with some coolant, make sure it's well seated and reinstall the clip. The sensor is well seated if the clip fits right over the top, just make sure both sides clipped into position. Replug it fill the coolant with VW original coolant mixed 50-50 with water if needed and done. If you have a fault you might need a scanner to erase the check engine or fault in the cluster.
What's the reason for changing it? Eratic temperature readings?
Posted on Nov 29, 2008
SOURCE: need exact location and picture
The exact locations and picture of Engine Coolant Temp (ECT) sensors on 2004 VW Jetta TDI:
1. ECT sensor 1 placed on cylinder head:
2. ECT sensor 2 placed on the left bottom side of the radiator:
Posted on Sep 22, 2010
This sounds like a bad control or broken wire inside the door, you will need to remove the door panel and check for broken wires, also remove the controls and make sure all connectors are connected good and tight, this is where i would start also just check all of the fuses.
Posted on Sep 23, 2010
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