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  1. Dvapower

    Dvapower Member

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    Hello all, just bought the wife a new S3 and want to fit some winter rims/tyres. Can’t seem to get a definitive answer on whether the TPMS system is direct (using wheel sensors) or indirect (using ABS to sense differential rotational speeds), does anyone here know if the car has sensors? Thanks in advance for any information you can offer.

    Dave
     
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  3. mike170

    mike170 Active Member

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    Take tyre off and put spare on?

    Maybe this will tell you if sensor on wheel!

    Just an idea.


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  4. AllanG

    AllanG Q5 TFSI

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    The TPMS uses the ABS data.
     
  5. Wibbly

    Wibbly Active Member Team Glacier TFSI Owners Group S-line owners group Audi A3 Manual

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    Yes, just found all my tyre pressures low due to cold weather. As they all do it at the same time TPMS doesn't spot it :-S. Re-installed an older version of this I had got for a previous car. https://www.tyrepal.co.uk/
     
  6. 1Rockape

    1Rockape New Member

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    If its direct with valve sensors you'll have psi and temp display of each tyre in the mmi

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  7. george forbes

    george forbes Member

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    had a slow puncture on my old merc running runflats which by the time i got home was sitting at 10 psi . tpms using ABS didn't even pick up on it.
     
  8. AlS3BE

    AlS3BE Well-Known Member

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    Problem with abs type is it’s looking for speed differential between wheels. 5-10psi difference will flag it on normal tyres. On runflats the tyres hold shape for 50miles+ so abs type systems isn’t going to pick up a speed difference between wheels till the run flat is useless and fail to hold shape. At that point the tyre isn’t repairable but runflats shouldn’t be repaired anyway.
     
  9. Khufu

    Khufu Well-Known Member

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    the direct TPMS has metal valves and as said, you can see the pressures in the MMI too. I think indirect is all that is fitted as standard. Not sure if its something you can spec on the a3/s3 etc or if you have to retrofit the system the TT etc use.
     
  10. Dvapower

    Dvapower Member

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    Thanks chaps, the valve necks are rubber so I think it’s safe to say the system is indirect and has no sensors.
     
  11. Boj27

    Boj27 Active Member VCDS Map User

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    Only the rs3 from the A3 range has the option of tpms. Although my prefl didn’t, I retrofit it. Took all of an hour. Unsure if lesser A3’s can have this as not sure if the ABS pump is compatible on lesser cars (considering it’s only a factory option on the rs3).

    You also need mib2 for full functionality as you won’t get temperatures without I don’t think.
     
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  13. Khufu

    Khufu Well-Known Member

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    Ive fitted it to my A3 without changing ABS module. You also need to make sure you get the right sender module to get the temperatures.
     
  14. 1Rockape

    1Rockape New Member

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    Which module have you used
    4m or 8s?

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  15. Khufu

    Khufu Well-Known Member

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    Address 65: Tire Pressure (J502) Labels: None
    Part No SW: 8S0 907 273 HW: 4M0 907 273 B
    Component: RDKHUFAU736 H04 0002
    Serial number: 40000000003093
    ASAM Dataset: EV_RDKHUFAU736 002007
    ROD: EV_RDKHUFAU736_AU37.rod
    VCID: 77F9B480CE965AF7A8-8022
     
  16. 1Rockape

    1Rockape New Member

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    Yes that's the one I have for the retrofit . Have you got vc? I've done this on my tt 8s hoping it will be pretty similar. Where have you mounted yours ?

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