If you are overhauling any Bosch Gen 2 motor, this kit contains every circlip used in the motor. These should be replaced to ensure good clip integrity.
Generation 2 motor BDU2xx (NOTE: Small chainring shown below).
Bosch Gen 2 Outer Crankshaft Circlip 2mm PLA00921, these are the two circlips visible on either side of the crankshaft. They are 19.5mm internal diameter and 2mm thick, fitted to the Bosch Gen 2 motor.
Bosch Generation 2 motor BDU2xx (NOTE: Small chainring)
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing left hand side.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Armature support bearing right hand side.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch green “tacky” seal grease and bearing cover for the right hand crankshaft bearing on early Gen 3 motors: Active Line, Active Line Plus and Performance Line motors. Suitable for all BDU3XX drive units up to serial number 859302XXX
Bosch green “tacky” seal grease and bearing cover for the right hand crankshaft bearing on early Gen 3 motors: Active Line, Active Line Plus and Performance Line motors. Suitable for all BDU3XX drive units from serial number 860011XX
Bosch Gen 3 Crankshaft O-ring PLB30525, small O-ring to fit the left hand side of the Bosch Gen 3 crankshaft.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Active Line, Active Line Plus and Performance Line Gen 3 BDU3xx Freewheel clutch bearing, fits into the large drive gear.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Gen 3 left hand crankshaft bearing fits in the left hand motor cover and supports the crankshaft.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
This is a high quality 3/8 drive Bosch lockring tool to remove the castellated nut or threaded chain guard from the front sprocket of a Bosch Gen 3 motor.
Generation 3 (Gen 3) covers Active Line, Active Line Plus and Performance Line from 2018. These motors have a large front sprocket and look like the motor Below.
Kit to replace all the bearings in the Bosch Gen 3 motor. This kit will fit the Active Line, Active Line Plus and Performance Line motor (There is no Gen 3 Performance Line CX)
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Gen 3 Right hand crankshaft bearing fits in the right hand motor cover and supports the sprocket carrier and crankshaft.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
Bosch Gen 3 Sprocket Carrier O-ring PLB30526 to fit the right hand side of the Bosch Gen 3 crankshaft sprocket carrier.
Bosch Generation 3 motor BDU3xx (NOTE: Large chainring)
This bearing supports the electric motor armature and fits into the left hand motor cover (non drive side).
Bosch Generation 4 BDU4xx
This kit contains the bearings, seals and circlips required to overhaul the Bosch Gen 4 crankshaft. We don’t usually say this, but we would not recommend you tackle this motor without a lot of specialist tools and a strong mechanical engineering background.
This kit will fit the Gen 4 Performance Line CX, Cargo and Speed motors.
Bosch Generation 4 motor BDU4xx.
Please see bearing identifier for bearing position.
Bearing will fit the Gen 4 Performance Line CX, Cargo and Speed motors.
