Bosch Active Line Plus Mid-Drive Motor

bosch active line plus

60 Nm

maximum torque

340 %

maximum assistance

600 W

maximum power output

2.7 kg

weight

Are you looking for an e-bike drive system that will reliably and smoothly guide you through the morning city rush hour, but won't be intimidated by a long climb in the countryside on the weekend? Bosch introduces the latest generation of the popular Active Line Plus motor with the code name BDU344Y. Designed specifically to be part of the Bosch The Smart System ecosystem, this motor defines a new level of quiet and carefree travel.

Key Benefits: Lighter, Quieter, and Smarter

Compared to its predecessor, the motor has undergone a complete evolution. The engineers managed to reduce the weight between generations by around 500 grams to a final 2.7 kg. In addition, the motor is smaller in size and more powerful (60 Nm).

Completely silent ride: If you love peace and quiet, the Active Line Plus is the ideal choice for you. The drive system is practically noiseless while riding, allowing you to fully enjoy the sounds of the surrounding nature.
Perfect, lasting harmony: Optimized software and advanced sensor technology constantly monitor your riding behavior and deliver power so naturally that the motor feels like an extension of your own legs. As soon as you stop pedaling, the assistance stops immediately and smoothly.
Long service life without maintenance: The motor is enclosed in a robust aluminum housing and features an improved sealing and bearing concept. It can easily handle riding in adverse weather conditions and heavy rain.
Responsibility to nature: Bosch focuses on ecology during production. The aluminum drive housing is made of 40% recycled aluminum (saving almost half of CO₂ emissions compared to conventional production), and recycled plastic is used for certain components.

Smart Features and Components

As part of The Smart System, the drive unit works with the eBike Flow app, where you can individually customize your riding modes. Key functional features include:

Hill Hold and start-up assistance: Intelligent assistance when pushing the bike uphill prevents the e-bike from accidentally rolling backwards.
Automatic support (Auto mode): The system automatically evaluates the route profile and changes the assistance level so you can focus entirely on the road.
ABS Compatibility: For maximum safety in unexpected situations, the motor supports the Bosch eBike ABS system for stable braking.
Coaster brake option: In combination with a hub gear system, the motor can be configured to allow back-pedal braking (coaster brake).

Technical Specifications

E-bike system	Bosch The Smart System
Continuous rated power	250 W
Maximum motor power	600 W
Maximum torque	60 Nm
Maximum assistance	340 %
Weight	approx. 2.7 kg
Maximum supported speed	25 km/h
Riding behavior on start-up	Harmonious, smooth
Gear compatibility	Derailleur gears (conventional) / Hub gears
Gear shift detection	Yes (for derailleur gears)
Coaster brake	Optional (only for hub gears)
Walk Assistance / Hill Hold	Yes

Who is this motor ideal for?

The Bosch Active Line Plus (BDU344Y) represents the perfect balance for city, cross, and trekking e-bikers. With a torque of 60 Nm, it handles hilly terrain with ease, and thanks to low consumption combined with modern batteries (such as the PowerTube 540), it offers a fantastic range. It is the ideal partner for anyone looking for the reliability of the Bosch brand, quiet operation, and premium riding dynamics without the need to purchase an aggressive sports drive unit.