WABCO EBS Axle Modulator 4800021230 Electronic Brake Pressure Valve for Semi Trailer EBS System

The WABCO WABCO EBS Axle Modulator (part number 4800021230) is a replacement component for the air brake and air suspension systems of heavy-duty trucks, buses and semi-trailers. It is built to original equipment specification from quality materials, so it installs on the original mounting points and performs reliably throughout the service life of the vehicle. Key ratings include Temperature Range -40°C ~ +80°C, protection class IP6K9K, Brake Pedal Stroke 21.2mm, pedal angle 25°~30°, weight 3.125kg, Protection Class IP6K9K.

By working directly with the trailer EBS control unit, the modulator applies brake pressure in step with the tractor and supports ABS, roll-stability and load-sensing functions. Sealed electronics and a robust pneumatic section deliver stable performance under heavy vibration and in all weather, cutting brake lag and improving combination stability.

Every unit is manufactured to original equipment specification and inspected before it leaves the factory, so it matches the fit, function and durability of the original part. Sealed, vibration-tested construction keeps performance stable in the heat, dust, road salt and constant vibration found on commercial vehicles, and standard interfaces make installation and maintenance straightforward. Spare parts, technical data and fitting advice are available on request.

• It Transmits Electronic Brake Signal to EBS: ECU while providing pneumatic braking function.
• Temperature Range: -40°C ~ +80°C: Protection class IP6K9K.
• Brake Pedal stroke:21.2mm: Pedal angle 25°~30°, weight 3.125kg.
• OE Original Quality: High signal precision, stable under strong vibration.
• Combined Pneumatic and Electronic Control: If electronic signal fails, pneumatic brake still works.
• Fit for Yutong: Ankai, Sinotruk, Foton and other EBS vehicles.

The modulator is used on EBS-equipped semi-trailers, including curtainsiders, box trailers, flatbeds, tankers and container chassis. It is especially valuable for high-mileage fleets and for operators carrying unstable or high-value loads, where synchronized braking and roll stability reduce the risk of jack-knifing and trailer swing.

Every unit is packed in a neutral export carton with foam protection so that ports, connectors and levers arrive free from damage. OEM cartons and private labels are available on request, and each carton is labelled with the part number for simple warehouse handling. All units are produced to original equipment specification and inspected before shipment; a twelve-month quality warranty and full technical support are provided, and mixed containers can be supplied for distributors and repair workshops. Please contact us for samples, volume discount pricing and confirmed lead times.