buybeach

Yes, this is a problem. It should display information when parked.

buybeach

Despite the fact that I had trouble with TPM on my A8L, I wish I had a similar (but functional) feature on my present car.

Within the first month of taking delivery on my new car, I found a slow leak and low TP in one tire. I pumped it back up, drove carefully to the local tire shop and they removed a drywall screw.

This happens to me not infrequently and a device that would draw driver attention to the low tire would be a great feature. It is easy to go into "denial" rather than into "denail" with a slow leak like this.

ryoung

when tires get really hot? I've had tread temperature hit 115 oC.

Kian-S8

We also supply to Cart racing application and some other racing. It is same technology but different packaging and software. System reads the data every 0.2 to 0.4 seconds. Battery does not last 8 to 10 years (like passenger car version), but they do not care for the racing applications. Batteries are not replaceable and they use a new set for the next race.
To give you an example for Audi TPMS (from Beru): The sensors on your car and the sensors on their LeMan's racing cars are identical only different software. They are using the same package.
We have about 10 different transmitters for commercial vehicles, off road trucks, motorbikes, military vehicles, .... Every application has its own requirements.

our system is rated up to 125ºC operational, and survives up to 180ºC. So it is very safe for racing applications. Tire and valve (or gaskets on the metal valves) start to melt at around 110ºC. Temp higher than 85ºC means warning for the passenger car tires, but in racing it depends on the team requirement as they do not bother the driver and read the data on the pit.

cohot

Mine tells me the vehicle has to be stationary in order to display Dont know why that should be -- it would be nice to have the data while driving.

buybeach

A bunch of features are disabled on MMI while vehicle is in motion besides tire pressure.

Some of them, such as suspension adjustments make perfect sense. There arerpesuably safety and techincal issues there. Others, such as refusing to allow you to display tire pressure or to adjust various settings was probably determined by the same legal eagles who wrote that annoying start-up screen you need to "Accept" in order to use your car.

Why reading the tire pressures is any more distracting than using the audio or air conditioning controls makes little sense, at least to me.

Hence this is a comment on the larger soceity and its declien rather than a criticism of Audi.

ryoung

Yep, all four have; and so has the gasket for the metal valve of my left front tire, the hottest.

Kian-S8

there are systems available on the aftermarket

D3AeighT

My wifes 2002 Jeep Grand Cherokee has tire pressure monitoring system. It seems to work fine but maybe not as sophisticated as the A8L'04. She asked me why this "thing" was flashing 25 on 3 of the 4 tires. Sure enough, I checked them with my handy dandy manual tire pressure gauge and they were at 25lbs. Drive it up to the Chevron, put in 32 lbs on all 4 corners. Checked the monitor panel again( not MMI of course )and they all read 32.