Quick Tip
If you can’t see the serial number label:
- Look under the bottom bracket area where the motor sits.
- Check the side of the motor casing near the crank.
- If the bike has a protective motor bash plate or cover, it may hide the sticker.
Sometimes the label is partially hidden by, dirt or grease. Cleaning the area may be necessary.
Finding the Serial Number on a Bosch eBike Motor
Bosch eBike motors (also called drive units) have a serial number label attached to the motor housing. This number is important for warranty, servicing, diagnostics, and parts identification.
Below is a quick step-by-step guide to help you locate it.
Look for the Serial Number Label on Your Bosch eBike Motor
The serial number is usually printed on a white sticker or metal nameplate attached to the motor housing.
The label typically includes:
- Bosch logo
- Part number
- Motor model (e.g., BDU3XX / BDU4XX)
- Serial number
- Barcode
Example format:
Bosch
0 275 007 04X
BDU3XX
Serial: XXXXXXXX
Typical Locations on the Bosch eBike Motor
Check these common spots:
- Bottom or underside of the motor
- Rear face of the motor housing
- Near the crank spindle
- Behind the chainring guard
Finding the Serial Number on a Brose eBike Motor
Below is a real example of a Brose eBike motor label. These labels typically contain the motor part number, production code, and serial or manufacturing identifier.
What the Label Shows
Typical information on a Brose motor label includes:
- Brose logo
- Motor part number (example:
E01680) - Manufacturing or production code
- Barcode or QR code
- Certification or compliance symbols
Example label structure:
brose
E01680
2.202.10809
[QR / Barcode]
The E-number (like E01680 or E06855) identifies the specific motor variant, such as a Brose Drive S Mag configuration.
Where the Label Is Located on a Brose Motor
Most Brose mid-drive motors place the label:
- On the underside of the motor housing
- On the rear or side of the casing
- Behind a plastic motor cover in some bikes
On certain bikes the motor cover must be removed to see the serial label clearly.