Tpms Help!

[danieldolin]

I have a 2007 boxster S with TPMS. I purchased 19" sport design wheels + tires off of a 2008 RS60. I was under the impression that the 2008 sensors are not compatable with my 2007 boxster so I have an appointment at the tire shop tomorrow to have them switched. The 19" wheels were delivered and I had them in my garage last night next to my boxster. This morning when I started my car, the TPMS system went into learning mode for the first few miles of my trip to work.

Is this normal? are the sensors from the 2008 wheels somehow compatable with my car? I do not want to keep my appointment with the tire shop and incur the expense of doing the swap, and the possible damage to the wheels, if this is not necessary.

Any help would be greatly appreciated

Thanks!

Dan

Edited April 29, 2010 by danieldolin

[paulv]

I have a 2007 boxster S with TPMS. I purchased 19" sport design wheels + tires off of a 2008 RS60. I was under the impression that the 2008 sensors are not compatable with my 2007 boxster so I have an appointment at the tire shop tomorrow to have them switched. The 19" wheels were delivered and I had them in my garage last night next to my boxster. This morning when I started my car, the TPMS system went into learning mode for the first few miles of my trip to work.

Is this normal? are the sensors from the 2008 wheels somehow compatable with my car? I do not want to keep my appointment with the tire shop and incur the expense of doing the swap, and the possible damage to the wheels, if this is not necessary.

Any help would be greatly appreciated

Thanks!

Dan

According to the TSB available on this site (for contributing members), the first generation TPMS was for vehicles with MY05-08, the second generation is for MY09. They did change the part number for the MY08 but it works with the MY05-07 cars.

BTW, when I changed my tires to a 255 in the rear, and reset the TPMS accordingly, it went into learning mode for a few miles and then worked normally.

Regards,

paul...

Edited April 29, 2010 by paulv

[danieldolin]

I have a 2007 boxster S with TPMS. I purchased 19" sport design wheels + tires off of a 2008 RS60. I was under the impression that the 2008 sensors are not compatable with my 2007 boxster so I have an appointment at the tire shop tomorrow to have them switched. The 19" wheels were delivered and I had them in my garage last night next to my boxster. This morning when I started my car, the TPMS system went into learning mode for the first few miles of my trip to work.

Is this normal? are the sensors from the 2008 wheels somehow compatable with my car? I do not want to keep my appointment with the tire shop and incur the expense of doing the swap, and the possible damage to the wheels, if this is not necessary.

Any help would be greatly appreciated

Thanks!

Dan

According to the TSB available on this site (for contributing members), the first generation TPMS was for vehicles with MY05-08, the second generation is for MY09. They did change the part number for the MY08 but it works with the MY05-07 cars.

BTW, when I changed my tires to a 255 in the rear, and reset the TPMS accordingly, it went into learning mode for a few miles and then worked normally.

Regards,

paul...

Thanks for the quick response... So when I get home tonight, if I put on one of the 19" wheels and just go for a quick drive to see if it works what is the worst that can happen? The rolling diameter should be the same, and I will not go on the highway or anything so I am not concerned about the miss matched wheels / tires, but could this do anything to the TPMS system?

[paulv]

I have a 2007 boxster S with TPMS. I purchased 19" sport design wheels + tires off of a 2008 RS60. I was under the impression that the 2008 sensors are not compatable with my 2007 boxster so I have an appointment at the tire shop tomorrow to have them switched. The 19" wheels were delivered and I had them in my garage last night next to my boxster. This morning when I started my car, the TPMS system went into learning mode for the first few miles of my trip to work.

Is this normal? are the sensors from the 2008 wheels somehow compatable with my car? I do not want to keep my appointment with the tire shop and incur the expense of doing the swap, and the possible damage to the wheels, if this is not necessary.

Any help would be greatly appreciated

Thanks!

Dan

According to the TSB available on this site (for contributing members), the first generation TPMS was for vehicles with MY05-08, the second generation is for MY09. They did change the part number for the MY08 but it works with the MY05-07 cars.

BTW, when I changed my tires to a 255 in the rear, and reset the TPMS accordingly, it went into learning mode for a few miles and then worked normally.

Regards,

paul...

Thanks for the quick response... So when I get home tonight, if I put on one of the 19" wheels and just go for a quick drive to see if it works what is the worst that can happen? The rolling diameter should be the same, and I will not go on the highway or anything so I am not concerned about the miss matched wheels / tires, but could this do anything to the TPMS system?

I think if you just mount the 19" wheel and see if it registers with the ignition on, then that will answer your question -- no need to drive the car -- just turn the key on, move the OBC stalk to the TPMS screen, and wait for the four psi measurements to come up -- this will establish that the sensor in that 19" tire is the right frequency. Make sure the 18" tire you took off is far away from the car so it doesn't interfere with the receivers.

The TPMS settings (via the OBC) are for 17/18/19" tires, summer/winter (tire width differences) and is set for approved tire sizes for all the tires on the car. The summer sizes in 19" (last time I checked) were 235/35/19 fronts, 265/35/19 rears. Anything else will skew the TPMS readings and could cause false warnings of tire pressure issues.

When I changed my tires (as mentioned previously) I bought Conti Extreme Contacts (which is an all-season tire) but they only made 255/40/18 and not the 265/40/18 I needed for the rears, so I set up the TPMS for "winter" and 18" tires (I only have stock 18" wheels) for year round driving. I set the TPMS in the tire installer's lot when they were done and drove away -- TPMS went into learning mode for a few miles and then the TPMS dash light went out and everything was OK.

I thought I saw where someone had the dealer (via PIWIS) add other tire sizes to the TPMS system, but I'm not sure on that -- maybe someone else has some insight to verify that. Sorry for the long-winded answer as the first sentence answers your basic question.

Regards,

paul....

Edited April 29, 2010 by paulv

[1schoir]

Dan:

There is a comprehensive article on the Porsche TPMS systems in a very recent issue of Excellence magazine. I can't remember the exact month, but it's only two or three months ago. If I find the issue, I'll post it here.

I read the article a while ago, and I think it will give you a definitive answer and maybe save you an unnecessary trip to the tire shop.

Regards, Maurice.

[danieldolin]

Thanks for your help guys... I got home from work today and put the new wheels on all corners, drove 5 miles and the TPMS sensors from the 2008 wheels worked fine with my 2007 boxster. Saved a trip to the tire shop, and now I can unload my old wheels as a wheel / tire / TMPS sensor package... a real win win! Edited April 30, 2010 by danieldolin