BMW N55 New 98G1B ROM Support Now Available

2011_BMW 335i Coupe_COBB_2

Many N55 BMW owners were updated to a new ROM version during their latest service visit.  The ROM update from the dealer resulted in the Accessport no longer being compatible.  This affected any 2011 135 or 335 with an N55 engine using the Accessport that received a ROM update from the dealer.  Now, this new ROM (98G1B) is supported by the Accessport and Accesstuner!  Support can be added by a simple firmware update.  You will then be able to flash your updated ECU with any of the Off The Shelf maps offered for previous N55 ROM revisions.  For custom tune updates, contact your Protuner.  If you have any questions on the process, or on anything else regarding your BMW, give us a call at 866-922-3059 or email and we can help!

jonathan webb on September 13, 2016 says:

Awesome, thanks guys! Been waiting all summer!

warren f ostlund on November 30, 2016 says:

how can you tell which rom my bmw has?

    Marshall on December 1, 2016 says:

    The only way to determine the actual ROM version is to either use an Accessport or factory tool (Autologic) to identify it. We are able to determine the ECU family by using the last seven digits of your VIN.