115923 is the same as the 117923-23 except that the 117923-23 has a very short tube (lip) on the intake. See what one customer did to adapt this motor for his S428i vacuum.
Customer used a Dremel to cut off old tube (lip) so that the short tube (lip) could be glued back on the new 115923 vacuum motor.
Customer used J-B Weld to reconnect the tube (lip) to the new 115923 vacuum motor. J-B Weld is available at most auto parts stores and takes about 24 hours to set up or harden.
Once the short tube (lip) is firmly in place the rubber seal can be reinstalled on the new 115923 vacuum motor.
This is where the vacuum motor and seal fit on the black base
