Originally Posted by MJR63
Mike - Newbie, quick question...I just purchased a new 2011 BMW 335i X-drive M-Sport sedan and am very interested in the new JB3 for the N55 motor. Will the dealer find out you have this device or can the NEW BMS CAN TOOL remove all codes? I'm just afraid I will void my warranty on my new car. Do I have to remove the entire harness every time I bring the car in for service?
Originally Posted by Jason4486
Avoiding his question? I'd like to hear your thoughts on this as well
Sorry must have missed it. The CAN TOOL will remove all codes once you remove the tune so you are all good
As for tune removal its the same as the N54 recommendation. If you are going in for oil service, etc. then you can leave it on but if you are going in for warranty work then its usually best to remove. The N55 stage1 tune is much easier to install/remove so if you are worried its best to always remove and clear the codes, if any.