Bosch E-Bike Tuning: Compatibility, BDU Codes and Magnet Systems
Which RedPed fits your Bosch e-bike? Compare the BDU code, motor generation and Bosch system in the overview. For the Smart System (BES3), the bike's magnet system also matters.
Bosch motors: BDU codes and RedPed compatibility
Which Bosch motors are compatible?
BES2 · Gen. 2–4
RedPed 3 for Bosch, all firmware versions.
BES3 · Gen. 3 and 4
RedPed for Bosch Smart System, all firmware versions when the requirements are met.
Gen. 5 / other magnet system
Gen. 5 and BES3 with a rim/valve magnet or without a spoke/brake disc magnet are excluded regardless of firmware version.
The BDU identifier denotes the motor family. BES1, BES2 and BES3 are Bosch systems; Gen. 1 to Gen. 5 describe motor generations. The same motor name can refer to different systems and generations.
| BDU code | Bosch motor | Motor generation | System | RedPed compatibility | Module / direct link |
|---|---|---|---|---|---|
| BDU1xx | Classic Line | Gen. 1Year of release: 2011 Source | BES1 | Not compatibleClassic / BES1 is not supported by RedPed 3 for Bosch. | No suitable RedPed module |
| BDU250PBDU250P CX | Performance Line / CX | Gen. 2Year of release: Performance: 2013 · CX: 2015 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU250CBDU255C | Active Line | Gen. 2Year of release: 2013 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU280PBDU280P CX | Performance Line (US) / CX | Gen. 2Year of release: Performance (US): 2014 · CX: 2015 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU290P | Performance Line SpeedSpeed version: factory assistance up to 45 km/h. | Gen. 2Year of release: 2013 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU310 | Active Line | Gen. 3Year of release: 2017 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU330 | Active Line | Gen. 3Year of release: 2017 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU350 | Active Line Plus | Gen. 3Year of release: 2017 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU365 | Performance Line | Gen. 3Year of release: 2019 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU380 | Active Line Plus | Gen. 3Year of release: 2017 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU385 | Performance Line | Gen. 3Year of release: 2019 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU386 | Performance Line Sport | Gen. 3Documented since: 2020 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU450 CXBDU450CX | Performance Line CX / Cargo | Gen. 4Year of release: 2019 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU480 CXBDU480CX | Performance Line CX / Cargo | Gen. 4Year of release: 2019 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU490P | Performance Line Speed / Cargo SpeedSpeed version: factory assistance up to 45 km/h. | Gen. 4Year of release: 2019 Source | BES2 | Compatible | RedPed 3 for Bosch |
| BDU336YBDU3360 | Performance Line | Gen. 4Year of release: 2022 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU374YBDU3741 | Performance Line CX / Cargo | Gen. 4Year of release: CX: 2021 · Cargo: 2022 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU376YBDU3760 | Performance Line CX Race | Gen. 4Year of release: 2022 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU378YBDU3781 | Performance Line SpeedSpeed version: factory assistance up to 45 km/h. | Gen. 4Year of release: 2022 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU332YBDU3320 | Active Line | Gen. 3Year of release: 2023 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU334YBDU3340 | Active Line Plus | Gen. 3Year of release: 2023 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU338YBDU3380 | Performance Line SportUS/NZ version: factory assistance up to 28 mph / 45 km/h. | Gen. 3Year of release: 2022 Source | BES3Smart System | Subject to conditions | RedPed for Bosch Smart System |
| BDU314YBDU3142 | Performance Line SX | SX motor familyYear of release: 2023 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU344Y | Active Line Plus | New motor familyYear of release: 2026 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU346YBDU3460 | Performance Line | Gen. 5Year of release: 2025 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU347Y | Performance Line PX | PX motor familyYear of release: 2025 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU384YBDU3840 | Performance Line CX / Cargo | Gen. 5Year of release: CX: 2024 · Cargo: 2025 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU386Y | Performance Line CX-R | Gen. 5Year of release: 2025 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU388Y | Performance Line SpeedSpeed version: factory assistance up to 45 km/h. | Gen. 5Year of release: 2025 Source | BES3Smart System | Not compatible | No suitable RedPed module |
| BDU306Y | Hub Line | Hub motorYear of release: 2026 Source | BES3Smart System | Not compatibleHub Line is a hub motor and is not covered by the support for Gen3/Gen4 mid-drive motors. | No suitable RedPed module |
Check the spelling or reset the filters. The Motor Finder helps you identify your motor.
The year of release refers to the introduction of the motor family. It does not indicate the year your bike was built or when motor production ended. “Documented since” gives the earliest documentation verified here. For distinct motor families without a clear generation number, we use the family name. For BES3, the BDU code alone does not reliably identify the magnet system fitted to the bike.
What do 32 km/h, 45 km/h and the tuning setting mean?
32 km/h can denote a regional factory version. 45 km/h can refer to factory assistance on a Speed or S-pedelec version, or to an adjustable tuning value. These figures are not interchangeable.
For motors with tuning detection, we recommend a setting of up to 33 km/h. The table matches motors to modules. Details on settings, activation and Bosch tuning detection are available in the linked product descriptions and the Bosch FAQ.
Bosch displays by system and motor generation
The display helps distinguish between BES2 and Smart System. However, it does not determine the motor generation or RedPed compatibility. Availability and retrofit options depend on the model year, display mount and equipment fitted to your e-bike.
| Bosch system | Motor generation | Typical displays |
|---|---|---|
| BES1 | Gen. 1 / Classic | Classic HMI; early Intuvia versions depending on the system |
| BES2 | Gen. 2 | Intuvia, Purion; Kiox / Nyon also possible depending on the year |
| BES2 | Gen. 3 | Purion, Intuvia, Kiox (BUI330), Nyon (BUI275/BUI350), SmartphoneHub / COBI.Bike |
| BES2 | Gen. 4 (without Smart System) | Purion, Intuvia, Kiox (BUI330), Nyon (BUI350), SmartphoneHub |
| BES3 | Gen. 3 / Gen. 4 | Kiox 300, Kiox 500, Kiox 400C, Intuvia 100, Intuvia 200, Purion 200, Purion 400, SmartphoneGrip |
| BES3 | Gen. 5 | Kiox 300/500, Kiox 400C, Intuvia 100/200, Purion 200/400, SmartphoneGrip |
| BES3 | SX / PX / others | Smart System displays such as Kiox 300/500, Purion 200/400 (depending on the bike) |
Bosch Smart System: identify magnets, ABS and connectors
Compare the images from the RedPed Motor Finder with your bike. The suitable magnet types apply to BES3 motors of generations 3 and 4. Gen. 5 is not supported.
Spoke magnet
Magnet on a rear wheel spoke, opposite the speed sensor.
Compatible
Brake disc magnet
Magnet on the rear brake disc or its mount.
Compatible
Rim magnet
Magnet on the rim instead of a spoke.
Not compatible
Valve magnet
Magnet on the tyre valve.
Not compatible
Bosch ABS
The ABS unit can often be identified near the front brake.
Not compatible
Grey sensor connector
Under the motor cover: the grey speed sensor connector must be plugged into the socket marked grey-green. Without this connection, the module is not compatible.
Check the connector in the Motor Finder
Bosch ConnectModule
Any installed Bosch ConnectModule (GPS) must be unplugged and removed before fitting RedPed.
Remove firstStill unsure which magnet system you have?
Check Bosch in the Motor FinderFrequently asked questions about Bosch tuning compatibility
Which Bosch firmware versions is RedPed compatible with?
All firmware versions of the supported BES2 and BES3 motors. BES3 must meet the listed requirements.
Does Bosch Gen. 4 automatically mean Smart System?
No. Gen. 4 is available with BES2 and with Smart System / BES3.
Does RedPed work with Bosch Gen. 5 and a brake disc magnet?
No. Bosch Gen. 5 remains excluded regardless of magnet, display or firmware version.
What should I do if I cannot find a magnet?
Compare the pictures and check the connector in the Motor Finder. Not finding a magnet does not reliably identify the magnet system.
Is the name on the motor or display enough to choose a module?
No. The full BDU code, Bosch system and, for BES3, magnet system are what matter. The general compatibility overview also lists modules for other manufacturers.