wgmainline
New member
Good morning everyone. I’m new here. I have a question about the coolant system on a ‘06 Beetle TDI. The code read coolant not heating up. Guessing it’s a thermostat or a sensor so I was gonna replace them both. My question is the part the sensor is mounted two has three other parts screwed into the top. What are they for? They look similar to glow plugs.