Comparison for SBB V46.02 and SBB V33.02 New SBB V46.02 add more newer cars, such as for Acura 2012, For Chevrolet 2013, For GMC 2013. (2) 2017 New SBB V46.02 Add RS232 cable ,can support firmware update,While SBB V33.02 can not support firmware update.