Nav pcm 2.1 build A to build B? Is it possible?

[fpjl]

I have just purchased an 05 911 with nav. Evidently it is an early build with the pcm 2.1 build A. It doesn't have phone buttons in the top left corner and I wanted to use one of the blue tooth aftermkt kits which specify the latter build. Anyone have an idea of what it would cost to upgrade. From a service bulletin posted on this site it looks like you would have to chage the head unit, pcm, nav unit and software?! Also would be nice to be able to use some of the software updates.

Thanks in advance.

[Loren]

I have just purchased an 05 911 with nav. Evidently it is an early build with the pcm 2.1 build A. It doesn't have phone buttons in the top left corner and I wanted to use one of the blue tooth aftermkt kits which specify the latter build. Anyone have an idea of what it would cost to upgrade. From a service bulletin posted on this site it looks like you would have to chage the head unit, pcm, nav unit and software?! Also would be nice to be able to use some of the software updates.

Thanks in advance.

:welcome:

I think it is all going to come down to the part number of your NAV.

Look at these two TSBs and the one workshop campaign (which should have already been done):

13/05 9110 PCM2.1 Navigation Update -- Sep 7, 2005

32/07 9110 PCM2.1 - Navigation Update -- Oct 24, 2008

26/05 W610 W610 - Installing New System Software On The PCM2.1 (Workshop Campaign) -- Feb 13, 2006

[berty987]

The PCM 2.1 "existing model level" software pre dates Level A and Level B versions. From the description of the post, it sounds like the unit in question is an "existing model level" version . There is little or no benefit to updating the PCM 2.1 unless a navigation drive is also included in the install. The Unit can be updated to Level B software via update CD's . First step is to update to level A , then to Level B. It should also be noted that after updating to level B , a new navigation DVD will be required , that is dated 2005 or later. In order to use the very latest navigation DVD (release 2009) a navigation DVD drive update is also required after the PCM has been updated to level B. If the car is also equipped with BOSE , the TSB should be read closely as updating the PCM may require additional operations in updating the Bose amplifier or in some cases replacing the amp completely. If the correct procedures are not followed the amp can end up wrecked or worse still the PCM software corrupted. There is no exchange or repair service offered for either the PCM or Amp.

The model level B software has differing revisions but only the very earliest ( version 3) is supported by the earlier PCM units that have been updated. Check with your bluetooth suplier that the software will work on this level. If the PCM doesnt originally have a phone application as an option the bluetooth add on may not work as these often fool the PCM into using the original software to interface with the add on hardware. Since your PCM isnt equipped with phone prep or sim card the software update to level B may not install the software that allows control of the bluetooth module. Ideally you need to ask the supplier or find someone else thats updated an early PCM. As to costs the map update is approx 350 Uk pounds (about 500 USD ?) , which iincludes the level B and navigation update CD's. If you also require the level A update an extra disc must be purchased but this is only a few pounds (dollars). Assuming you dont have BOSE and terefore any issues with the amp the only other costs are about 2 hours labour to perform the update and check everything runs correctly. If the map need updating or replacing this could be at best one hours labour and a few dollars for an update CD ranging to a few hours plus a thousand or so for a new AMP.

Edited September 8, 2010 by berty987