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Thread: VW Water Coolant Reservoir Replacement

  1. #1
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    VW Water Coolant Reservoir Replacement

    Hi Guys,

    Can you help me out - I have a 2009 Tiguan Auto - with a suspected leak in the water tank as I top it up with water & after a day or 2 I get the light flashing again!

    Is this a leak somewhere? If so whats the ball park of getting it fixed or doing it myself if possible?

    Really need some advice

  2. #2
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    This should be the part to suit if that's where the issue lies: Coolant Expansion Tank V10-0433 Vaico for VW Skoda Audi | Run Auto Parts

    Are you sure your water pump isn't leaking, as it's a pretty common issue on the 2.0TSI engine (and most VW/Audi engines too be honest). There will be dried pink residue where the leak is coming from.
    2015 Mk7 GTI Performance
    2015 Audi SQ5 bi-turbo V6 TDI family hauler

  3. #3
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    Quote Originally Posted by Lucas_R View Post
    This should be the part to suit if that's where the issue lies: Coolant Expansion Tank V10-0433 Vaico for VW Skoda Audi | Run Auto Parts

    Are you sure your water pump isn't leaking, as it's a pretty common issue on the 2.0TSI engine (and most VW/Audi engines too be honest). There will be dried pink residue where the leak is coming from.

    Yeah I think it might just be a leak - but I have a mechanic that's telling me it'll cost hundred's to fix, which sounds off to me !! Especially if the part is only around 50 with labor I understand but he's talking near a K to fix up.

    I'll have a look around the pump & hopefully get somewhere haha! Thank you so much

  4. #4
    Quote Originally Posted by CMC View Post
    Yeah I think it might just be a leak - but I have a mechanic that's telling me it'll cost hundred's to fix, which sounds off to me !! Especially if the part is only around 50 with labor I understand but he's talking near a K to fix up.

    I'll have a look around the pump & hopefully get somewhere haha! Thank you so much
    Hi, did you ever find the source of your problem?

  5. #5
    Join Date
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    I had to change the coolant expansion tank on my MK6 GTI the other day, same part as the one shown earlier in the thread for the Tig. I figured it's a relatively simple part so just bought it off ebay for about $23 delivered, it's some German brand and looks very good quality, comes with 1 year warranty.

    TOPAZ Coolant Expansion Tank w/Cap for Audi A3 Q3 VW Golf Tiguan 1K0121407A 6941024970570 | eBay

    It was a very easy install, will probably post a video on YouTube at some point.

    Sent from my SM-G975F using Tapatalk
    Last edited by bbadr; 10-05-2021 at 10:39 PM.

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