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2.5TDi Coolant Temperature Sensor (G62) Replacement Guide

Discussion in 'A4/A4 cabriolet/S4 forum(B6 chassis)' started by quattrojames, Aug 8, 2011.

  1. quattrojames
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    quattrojames Moderator Staff Member Moderator

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    [Aug 8, 2011]
    Car's been showing some random temperatures of late, with a recent thermostat and water pump I decided to give this a go. These are part numbers and prices from TPS:

    059919501A Temperature Sender £26.17
    032121142 Retaining Spring £0.42
    90316802 O ring £0.93
    Plus 1.5L G12 £4.28

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    Pop the cover off and here is the sensor, I was quite pleased to see mine looked like it had been weeping, helped to convince me it was at fault:

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    The little plastic locking spring can be eased out carefully so you don't drop it:

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    I used pliers, as long as you've got a replacement you don't need it. But knowing my luck it would pop the timing belt off!

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    It will just lift out then. It's best to unplug it before lifting it out to minimise coolant loss, but this is for demonstration - the little catch just levers up and it will pull out. You might not be able to do this in situ, I couldn't, hence the G12 above:

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    I cleaned the plug up and sprayed some water dispersant in, and also wiped around the O ring seal. Don't forget to take the old O ring out if it doesn't come out with the sensor!

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    Fit the sensor:

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    Job's a good 'un:

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    I ran the car at this point to make sure there were no leaks. Top up the G12 and you're done:

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    Mine looked pretty grotty so I've no objections to the £38 spent.

    [​IMG]
    #1
    Carlisle v6 tdi likes this.
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  3. TonyColby
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    TonyColby New Member

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    [Apr 7, 2013]
    Brilliant! Couldn't object at the £36 either. I combined this with changing the six glow plugs (which wasn't quit so straightforward) but I have a car that starts first time without a Bond-like smoke screen!!

    Thanks for the article and giving me the confidence to do the job myself.

    Tony
    #2

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