Just installed my PCM (997.642.143.10 - supposedly off an 08 Carrera S) into my 05 Boxster, and am shopping around for the NAV drive unit (can't leave well enough alone). Is there a look up table to determine if my PCM will work with the following "07" drive unit:
997.642.157.00
(I believe this is for the Cayman not the Carrera - think the Carrera unit is 997.642.157.
01
). Thanks for any wisdom.
Cheers,
Jon
Just make sure that you don't buy a nav unit from either a 4wd 911 or any of the Cayenne SUV's. The gyro's are mounted differently because the unit is installed horizontally in the 2wd 911's and 987's and vertically in the 4wd 911's and Cayenne's.
The PCM unit you have installed was designed to work with the later extended navigation capable DVD drives. When a part is completely transparent across the model range , Porsche rarely change the part number between vehicles. The DVD drive sits in the same position and orientation on a 997 2WD as it does in a boxster / cayman , so the part numbers are shared for both applications. The simplest way to check for a match is to look on the PET ( PARTS) catalogue for your model number of PCM and find the chassis range associated with it. Then find the appropriate DVD drive for the same chassis range. If you then check the part numbers across vehicles (ie 911 and boxster) the numbers should match.
To answer your question the PCM you have is also found in the 987 (cayman and Boxster) the DVD drive 997 642 157 00 is the matching part.
It is also worthwhile getting the PCM coded for a boxster rather than 911 as the speaker layout and rear rolling radius of the wheels is different. If the PCM came from a carrera its possible the navigation function isnt enabled. Unlike the boxster the PCM was standard on the S models but the navigation was extra. This will mean a trip to the dealer to get the navigation module (DVD drive) enabled. The country coding should also be checked as radio frequencies vary between countries. Not 100 percent sure how the Porsche navigation works but many OEM navigation systems rely on the speed pulse from the wheels and gyros for most of the time , only using the GPS input as a cross check on a periodic basis. if the rolling radius is incorrect for the navigation settings you can get errors in positioning or delays in mapping .
