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Breakdown of BMW designation

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A5S 300J (former designation)
A Transmission type  
  • S = Manual gearbox
  • A = Automatic transmission
5 Number of forward gears  
S Type of top gear  
  • D = Direct gear
  • S = Overdrive gear
300 Max. input torque (Nm)  
J Code letter of transmission manufacturer  
  • G = Getrag
  • J = Jatco
  • R = GMPT (General Motors Powertrain)
  • Z = ZF (Zahnradfabrik Friedrichshafen)
SMG Notes SMG = Sequential M gearbox/transmission
GS6-37BZ (new designation according to BMW Group Standard GS 90007)
G Transmission  
S Transmission type  
  • S = Manual gearbox
  • A = Automatic transmission
6 Number of forward gears  
-    
  • - = Standard with manual gearshift
  • HP = Hydraulic planetary gear
  • DKG= twin-clutch gearbox
37 Transmission type  
  • 26 = D-transmission
  • 31 = C-transmission
  • 39 = F-transmission
  • 37 = H-transmission
  • 53 = G-transmission
  • 17 = I-transmission
  • 47 = J transmission SMG -7-speed
  • 45 = K transmission
  • 36 = Transmission DKG
B Gear set  
  • B = Petrol gear ratio
  • D = Diesel gear ratio
  • S= Sport gear ratio
Z Code letter of transmission manufacturer  
  • G = Getrag
  • Z = ZF (Zahnradfabrik Friedrichshafen)