The AT we supposedly have according to realoem is the ZF 6HP19Z. The 6HP19 is reportedly built for 400nm of input torque and was used in up until 09/2007. Since then, ZF’s 2nd generation transmissions such as the GA6HP21 came with massively lower shift times and input torque rating of 450nm. Supposedly, BMW is using the 6HP21 in our 2008+ cars but with the internal handle of 6HP19TÜ.
AW 135i N55
"SOLD"-09LCI-E90-320D-Black Sapphire Metallic- Superchip - OEM 189 wheel - City Vision Angel Eye - Matt Black Grill - K&N 57i Air Intake - XForce exhaust tip with Muffler delete - Eibach pro kit & Msport steering wheel, Yellow caliper BIG Thanks to bmroxm5 - Koni Yellow + e36 M3 Front bump stop/M-sport rear bump stop -Hankook V12