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Old January 8th, 2011, 10:43   #1
NSTDI
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Default 1998 Beetle TDI Temp Sensor

From what I read the 99 up sensor is different than the 98. Is the 98 a 2 pin like this one:



Or is it a 4 pin like this one (or it could be square?):



If the 4 pin, where is it located on a 98 beetle TDI?

Thanks,

Don
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Old January 8th, 2011, 11:02   #2
weirdajs
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Coolant Temp Sensor Green 4pin w/Seal and Clip (A4) this from idparts.com

http://www.idparts.com/catalog/produ...roducts_id=351
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Old January 8th, 2011, 11:43   #3
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Is it this blue one at the back of the block driver side?





The one just to the left of the battery in line in the top rad hose is the 2 pin sensor.

Don
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Old January 8th, 2011, 12:02   #4
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Yes, that is it. It's a 99.5 CTS that are blue.

BTW, dude, you seriously need to clean that engine.
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Old January 8th, 2011, 12:43   #5
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Thanks, it looks better with the cover on it and the oil keeps it from rusting.

Don
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Old January 9th, 2011, 07:56   #6
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I hate that sensor. My 2001 New Beetle uses the 4 pin , the green pictured above.
I replaced it in June, bought a new one at Autozone for like $15 or so.
November when the weather got cold , it started to leak, I pulled it out , replaced the O ring with a generic one, and sealed it with ATV High temp black silicone.
I can't believe VW makes a sensor that does not bolt to the block. This one is just pushed in, held in by a plastic clip.

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Old January 9th, 2011, 08:37   #7
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Quote:
Originally Posted by touaregv10tdi View Post
I hate that sensor. My 2001 New Beetle uses the 4 pin , the green pictured above.
I replaced it in June, bought a new one at Autozone for like $15 or so.
November when the weather got cold , it started to leak, I pulled it out , replaced the O ring with a generic one, and sealed it with ATV High temp black silicone.
I can't believe VW makes a sensor that does not bolt to the block. This one is just pushed in, held in by a plastic clip.

Try buying an OEM sensor. Autozone sells junk.
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Old January 9th, 2011, 09:36   #8
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I used OEM, $35.00 including the clip and o ring. It fixed my problem.

Thanks for the help.

Don
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Old January 9th, 2011, 13:46   #9
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Quote:
Originally Posted by turbocharged798 View Post
Try buying an OEM sensor. Autozone sells junk.
What I am discussing here is not the quality of the sensor , but the way it attaches to the block.
It is held in by a simple plastic clip.
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Old January 9th, 2011, 18:32   #10
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The 2 pin sensor that is inserted into the radiator hose is part of the AC system. The AC will only work when the coolant is at a certain temperature.
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