Tyre pressure

mjcourtney

Registered User
I'm assuming they mean they're only compatible with the more expensive Active-TPMS system that monitors actual PSI in each tyre via a sensor built into the valve cap. This system is available on other Audi models, but the current A3 TPMS is an in-direct method and just monitors pressure via rotational distance / drag through the ABS sliprings so it can detect a flat tyre. In which case I'd say no, the valve caps in the link won't fit the valves on the A3.
 

cemerson

Registered User
It does say "The valve caps can only be used for wheels and valves which are fitted with the tyre pressure monitoring system.", and the option on the A3 is worded exactly like that one, so could be. You'd certainly be able to send them back if not.
 

mjcourtney

Registered User
True, but the valve caps on the A3 are totally standard, regardless of TPMS. So the fact that these caps state they are 'only for cars with TPMS' suggests the valves are 'special'. But as said, easiest way is to order them and send them back if they don't fit.

Oh, and then let us know the outcome lol.
 

stathej

Registered User
I believe the A3 uses the ABS sensor to monitor the wheels rotational speed as mentioned above for the TPM system. As the tyre deflates it's diameter is smaller so the ABS sensor detects the change compared to the other wheels.

You should not need the TPM valve caps for an A3 these ones should suffice and you save a couple of quid

https://merchandise.audi.co.uk/?page=shop&pid=3093
 

ACWKGYTO

Registered User
I believe the A3 uses the ABS sensor to monitor the wheels rotational speed as mentioned above for the TPM system. As the tyre deflates it's diameter is smaller so the ABS sensor detects the change compared to the other wheels.

You should not need the TPM valve caps for an A3 these ones should suffice and you save a couple of quid

https://merchandise.audi.co.uk/?page=shop&pid=3093[/QUOT

Would need to be locking for me to buy those @ £18 !
 
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