View Full Version : Ok, Now I'm mad... Coolent temp sensor

11-23-2009, 04:08 PM
Hey guys

I use to own a 98.5 A4 1.8T 5speed
The head was stamped ATW
Well I needed to replace the temp sensor just behind the head
so I bought the blue one from MJM and it was the wrong one.
So I bought the green one and it's the wrong one too!

I told the new owner (A friend) I'd replace it so I'm lost now...

How is this? What one do I need?

The sensor has a square connector.

Where would I find this?

What sensors did I buy? Here are the ones I bought...

Bought this one... Blue 2 pin and mine has 4 pins...


and then I bought this one... has 4 pins but the connector isn't square and the pins on the green sensor are too close together.


So where do I find the one I need? And are the ones I bought for another spot on the car?


11-23-2009, 04:10 PM
059 919 501. 501a is the green one. there is a blue 4 pin sensor. check ecstuning. i think its also part # 078 919 501b.

btw, an atw head is not stock on your 98 car.

11-23-2009, 04:11 PM
Pull yours out and take it to NAPA. They have it and it is cheaper. Same exact product.

11-23-2009, 07:01 PM
Will do! Thanks

11-23-2009, 08:48 PM
Here you go. Blue, 4-pin sensor:


k0mpresd is right: Audi part# 078 919 501b

11-23-2009, 11:26 PM
Ok guys, thanks!