Retarder 123+ - for safe and efficient bus operation

    The robust, high-performance Voith Retarder 123+ provides greater safety, efficiency, and riding comfort during bus operation. The retarder has its own transmission-independent oil supply and is available as a customized solution for various gearbox types.

    Voith Retarder 123+

    Features and benefits

    • Higher average speed
    • Fewer visits to workshops
    • Reduction of vehicle operating costs
    • Less service brake overhauls and tires
    • Fast amortization
    • Hydrodynamic Retarders are more fuel-saving than electro-magnetic Retarders
    • Advantages for a vehicle resale

    Technical data

    Voith Retarder VR 123+*  
    Max. nominal braking torque at the propshaft 2 000 Nm
    Max. speed at the propshaft 3 600 rpm
    Operating standard Hand brake switch,
    option: foot control
    Operating medium oil (see fuel specification)
    Fill rate (Oil change) 6 l
    Control medium compressed air
    Unit weight without operating medium approx. 59,5 kg
    CAN-bus-specific electronic control system VERA


    *Voith local India Retarder VR 123+ for Buses

    Functional principle




        Service – where your bus is in good hands

          Whether it’s maintenance or repairs, troubleshooting, or the functional testing of individual components: our professionals will make sure you stay on the road. At the Voith retarder workshop in Crailsheim, and throughout the world.

          Judge us by our performance

          • Onboard troubleshooting and upgrade 
          • Replacement and repair 
          • Repair of supplied retarders (all model series) 
          • Troubleshooting and functional testing of individual components 
          • Worldwide delivery of Voith original spare parts, as well as 
          • replacements and basic retarders

          Retarder oil list

          Do you have any questions about Voith Retarder 123+? We’re here to help!

            Service contact

            Voith GmbH & Co. KGaA

            Mobility Service

            Hardtstraße 8 74564 Crailsheim, Germany


            Technical Support

            Technical Support


            t +49 7951 32-1555

            f +49 7951 32-1506

            Spare parts orders

            Spare parts orders


            t +49 7951 32-1644

            f +49 7951 32-756