2008 Audi A4 Avant tire pressure sensors?

[Paul Dhuse]

Hi all,

A friend has a '08 A4 Avant (U.S. spec), and we were wondering if
anyone knows how reliable and accurate the tire pressure sensors are.
Are they good enough to rely on to know that your tires are soft? Or
is a good tire gauge and a weekly/monthly check still the best route?

Thanks.
--

[Tom E]

"daytripper" <day_trippr@REMOVEyahoo.com> wrote in message
news:r6vet4hpe5rv4n0git0m5bhu22mdkktihf@********...
> On Sat, 4 Apr 2009 06:56:34 +0100, "Tom E" <TE@***************> wrote:
>
>>
>>"Paul Dhuse" <pdhuse@pacbell.net> wrote in message
>>news:t1kSDs33RET1-pn2-6Y1V5DEVQCWo@localhost...
>>> Hi all,
>>>
>>> A friend has a '08 A4 Avant (U.S. spec), and we were wondering if
>>> anyone knows how reliable and accurate the tire pressure sensors are.
>>> Are they good enough to rely on to know that your tires are soft? Or
>>> is a good tire gauge and a weekly/monthly check still the best route?
>>>
>>> Thanks.
>>> --
>>>
>>>
>>
>>To register pressure they must come through a slip ring on each hub, so
>>its
>>how good are the seals and how long will they last. This technology is a
>>by
>>product of motor racing, where the cars are stripped down and rebuilt
>>after
>>every race....so how long will it last in a car that does not see
>>that treatment. The monthly check is easy and you can then compare
>>figures.
>>Why not let one tyre down and compare the electronic reading to your
>>manual
>>gauge.
>
> Which manufacturers use "slip rings" to convey TPM data? That's the first
> I've
> heard of that, as to this point the systems I've read about used on
> consumer
> vehicles either use RF with direct TPM sensors on the tire valve stems, or
> use
> the same axle rotation sensors used for electronic stability controls and
> antilock braking controls to indirectly derive inflation status. And those
> sensors do not utilize "slip rings"...
>

my Uncles Fordson tractor....