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Engine coolant temperature sensor

Discussion in 'A4/S4 forum(B5 Chassis)' started by liam_mcf, Apr 17, 2009.

  1. liam_mcf
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    liam_mcf New Member

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    [Apr 17, 2009]
    Looking for one for a 1996 P Reg 1.8T

    Anyone any ideas where i could pick one up from?

    Been to a car part place round the corner, they have another two sensors but the one i'm looking for!

    Even a part number would be handy, struggling to find the correct one

    Thank you for any help
    #1
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  3. Siena
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    Siena Active Member

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    [Apr 17, 2009]
    I can help...what color is your current switch, and does your car have air con?
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  4. liam_mcf
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    liam_mcf New Member

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    [Apr 17, 2009]
    It does have air con mate, i'm not 100% sure on the colour but i will check when i'm home from work....hopefully in a couple of hours :)

    thanks!!
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  5. Siena
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    Siena Active Member

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  6. graham A4
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    graham A4 A4

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    [Apr 17, 2009]
    ANY AUDI DEALERSHIP WILL SUPPLY U THE CORRECT SENSOR ONCE THEY HAVE THE CHASSIS NUMBER, THERE VERY CHEAP I BOUGHT ONE RECENTLY FOR 25 EUROS SO IT B EVEN CHEAPER IN STERLING
    #5
  7. liam_mcf
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    liam_mcf New Member

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    [Apr 19, 2009]
    Can't seem to locate the sensor at all!!

    I know what it looks like......i think :tocktock:

    Been told its located at the rear of the engine bay, sorry but very limited knowledge of engines...

    Anyone point me in the right direction?

    Cheers
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  8. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Apr 19, 2009]
    Its at the back of the cylinder head.

    If you look down the gap between the cylinder head and the firewall, you will see a black metal pipe running across the back of the head. In the middle of this pipe there is a round boss with the sensor in, you'll see the electrical plug sticking out the top.

    You'll need to pop the connector off to see the color of the sensor itself.
    #7
  9. andybnwc
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    andybnwc Member

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    [Apr 19, 2009]
    just out of interest are the green and the blue sensors different and if so in what way as , ive just replaced on both cars the s4 sorted but the other one seems to have made a difference but seems to not move much at all . thanks in advance
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  10. liam_mcf
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    liam_mcf New Member

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    [Apr 20, 2009]
    Thank you for this, will have a look when its light tomorrow! Cheers
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  11. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Apr 20, 2009]

    What do you mean by not move much?

    A working CTS/Instrument Cluster will come round to exactly 90c and sit there once warmed up.

    The cluster has a buffer built in so that any temperature in the "normal" range (which is around 80-100c) will show 90, and the guage will only ever move if its outside this range...
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  12. andybnwc
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    andybnwc Member

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    [Apr 20, 2009]
    it pretty much stays on just above 0 and if i am not driving in traffic amy get to about a quarter, i put a blue sensor in as thats what came out . The old one didnt seem that bad tho
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  13. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Apr 20, 2009]
    faulty thermostat?

    If its all working correctly it should read 90 all the time.

    What does vagcom say its reading?
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  14. liam_mcf
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    liam_mcf New Member

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    [Apr 20, 2009]
    Ok due to aragorn's spot on description i found it no problem, took the plug off and the sensor is blue in colour.

    Siena would you happen to have one that would do the trick?

    If so let me know a price :)
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  15. andybnwc
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    andybnwc Member

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    [Apr 20, 2009]
    ill have a go tmrw if i get chance , where about on vag com will it be read
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  16. aragorn
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    aragorn "Stick a V8 in it!" Staff Member Moderator VCDS Map User

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    [Apr 20, 2009]
    just have a flick thru the engine sensors, its in there somewhere.
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  17. Siena
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    Siena Active Member

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    [Apr 20, 2009]
    Liam, I have a couple here, will let you know how much tomorrow.
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  18. liam_mcf
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    liam_mcf New Member

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    [Apr 21, 2009]
    Excellent Siena, thank you!
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  19. Siena
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    Siena Active Member

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    [Apr 21, 2009]
    £28.75, includes the O-ring.
    #18
  20. liam_mcf
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    liam_mcf New Member

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    [Apr 21, 2009]
    Thanks, PM sent!
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