This service kit features a bearing protection ring BDU3xx. It's designed to safeguard the bearing L3 on the drive unit. The kit includes 8 bearing rings (2 pcs of 1.270.016.122 + 1.270.016.123), 1 tube of 20 g grease (1.270.014.101), and 1 lifting - tool. It's suitable for all drive units (Active/Active Plus / Performance BDU3xx) up to serial number 860011xxx.

Using this Bosch e - bike motor bearing service kit is easy. First, use the lifting - tool to access the drive unit. Then, apply the 20 g tube of grease to the bearing L3. Next, install the 8 bearing rings (make sure to use the correct pieces as marked). This will protect the bearing from wear and tear. When handling the kit, keep it clean and dry. Store it in a cool place away from direct sunlight. For long - term performance, check the grease level periodically and replace the bearing rings if they show signs of damage.