Mercedes ML320 W163 Blend Door Motor Gear

This will replace the gear that tends to break in the blend door motor (oem part number a1638200108). It is unlikely that this part would fit aftermarket motors.

Before disassembly of the item, flip the motor over and mark the position of the nub on the metal shaft. You want to reassemble in the same place. Four screws hold the motor together, remove them and the motor assembly will open in two pieces. The top idler will come out easily. Next comes the metal shaft with the gear to be r