cutie de viteza automata GA8HP70Z — AWD 8HP70X bmw 44 biturbo 450hp 750xi F01 F02 550xi F10 F11 650xi Gran coupe F06 F12 F13 8HP70X xdrive 7646027.8615278.8648674.8637839.8648675.8680411.8684801.8487255.8742502 transfer diferențial central 4x4 benzina N63B44