Manual Transmission/Transaxle: Application and ID

E85 Transmissions Applications

There are 4 different transmission offered for the Z4 (E85):

1 is an Automatic and 1 is an SMG (Sequential Manual Gearbox)

2 Manual Transmissions:
GS5-20BG 5-speed manual transmission (known from the E46 as S5D-250G).
The brief designation is the B-gearbox.

GS6-37BZ 6-speed manual transmission.
The brief designation is the H-gearbox.

Sequential Manual Gearbox:
The Sequential Manual Gearbox (SMG) is available as an option (code 206).
The basis of the SMG is the H-gearbox (known as H-SMG).

Breakdown Of BMW Designation:

Manual Transmission: