MMD

Shows actual pressures insted of idiot light?! WOW. That sounds good to me. Now the thing suddenly seems almost a bargain at approx $800 or $900

boolala

I seriously doubt the TPMS "reads" a slow leak. That's not how these things work. They respond to changes in tire pressure from the point at which they were calibrated. So if there's a slow leak you won't know of it until the thresh-hold drop in pressure has been exceeded. This may take several days. Had you had an actual tire pressure read-out you could have seen the gradual fall in pressure and, perhaps, inspected the tire more carefully. At least that's how it works on my Benz.

Le Chef

The display in the tach shows tire pressures. Take a look at the brochure and you can see it in some shots of the instruments and dash. Wish it had been available when I ordered mine...

I wonder what happens when you change from summer wheels and tires to winter wheels and tires. Where are the sensors? Do you need a second set for your winter setup?

1080iAddict

Uh... yeah, it does "read" the slow leak. No offense, but I was there and experienced this myself. Maybe it is different from manufacturer to manufacturer (probably is), but my M5 system did read the change in tire pressure due to this slow leak, when it was not apparent to the naked eye.

Now, I do know that it will NOT read the very gradual, i.e., natural, change in pressures over a course of months caused by temperature, normal seepage, whatever, that requires the driver to monitor the pressure and add a smidget of air from time to time. If this is what you are referring to, you are 100% correct. However, TPMS will sense an embedded puncture that would otherwise take several weeks to deflate a tire.

cheers.

Carlos from Spain

No problem Adam, yes that is in Euros.

texas911

I had TPMS on my E55 and it diplayed the pressure on all 4 wheels via a pictograph. Very very accurate and you can actually see the tire pressure go up as you drive (tires getting hotter). Maybe it will be the same for the 997 and the idiot light is only a secondary warning. I loved the TPMS on my E55, never got a flat, but gave a safety margin since my E55 didn't have a spare (early 04 model).

OCBen

I've heard that the TPMS on the Cayenne has been nothing but a PIA. My dealer tells me that many owners of Cayennes have had to bring them in because the system misreads pressures and basically shuts down the car because it "thinks" tire pressure is too low. Any Cayenne owners here with TPMS experience this? Maybe the system is set to be sensitive on SUVs, what with roll-over concerns and all. If Porsche has indeed perfected their TPMS then this would be for me a must have option. The more monitoring of vital information the better, but only if it works accurately and reliably.

1080iAddict

By the way, 996ttcab was correct. I just added TPMS to my July build.

-ach

alin2

The TPMS on my C-TT was flawless and was awesome in that it could read exact tire pressures within +/- 1 PSI. I don't know about others, but my TPMS system worked great.

gota911

Why don't they develop something REALLY useful, like a digital readout on the dash that shows EXACTLY how many bugs are stuck to your 1) bumper, 2) left side mirror, 3) right side mirror, and 4) wind shield. Now THAT would be worth the price of admission!

MMD

You bring up an EXCELLENT point!

I'm looking at and have to live with a computer screen in the center console and Porsche nowadays thinks guys who buy their cars are TOTAL gadget freaks, right?

Well why don't they make that computer screen do something IMPORTANT like show engine diagnostics, outputs, faults etc. For example it would be really nice to see if i'm ACTUALLY getting premium gas when I pay for it by checking what teh valve timing is doing.

The service depts have all sorts of software to service the cars WHY can't I have THAT included in my outrageous $2000 (US) bill for the stupid NAV system module???

OCBen

Maybe they will soon in a few years. It shouldn't be that difficult. All that's really needed are the measurement inputs from sensors (in addition to the ones there already) and the software to analyze the data and display it on the computer screen. And maybe a beefier PCM cpu with more memory to handle the processing load. I don't see why it can't be done.

JimStrott

Do you mean that the tire didn't "look" flat, or that you'd been measuring the pressure and your gauge showed normal pressures?

-Jim

jfraser

....."Well why don't they make that computer screen do something IMPORTANT like show engine diagnostics, outputs, faults etc. For example it would be really nice to see if i'm ACTUALLY getting premium gas when I pay for it by checking what teh valve timing is doing.

The service depts have all sorts of software to service the cars WHY can't I have THAT included in my outrageous $2000 (US) bill for the stupid NAV system module???...."

It's not like Porsche could say that it would make the PCM overly complicated, not user friendly, and have too many buttons.....after all they've already accomplished that!!!

1080iAddict

The tire didn't look flat. I did not measure with a gauge because I was only 5 days into the vehicle and had no reason to suspect a flat (other than the clear warning on the dashboard, of course ). With the low profile tires it is very hard to see a flat until it is very flat.