• Tractor
  • Truck - Medium
  • Truck - Heavy
  • Trailer
  • Bus & Coach
  • Fire & Emergency
  • Construction
  • Military
  • Motor Home

Did You Know?

Meritor WABCO is the first to the NA market with OnGuard 50,000+ systems in the field, 6 billion highway miles.


Meritor WABCO has been a trailer ABS technology leader since 1993 with ABS offered as standard equipment at all major trailer OEM’s. Enhanced Easy-Stop™ ABS provides unparalleled trailer monitoring and control capabilities to fleet and owner-operators with system configurations to meet virtually any trailer application – basic, standard, and premium.

2S/1M Basic
2-sensor/1-ABS relay valve system provides increased directional stability while meeting FMVSS-121 requirements. Recommended for converter dolly and semi-trailer applications.

2S/2M Standard
2-sensor/2-ABS relay valve system delivers extra control and directional stability with increased protection against tire flatspotting. Valves can be serviced individually. Recommended for single and tandem axle semi-trailers.

2M Premium
Choice of 2 or 4 sensors. A third relay valve is available on 4-sensor model. Recommended for tandem axle semi-trailers, multi-axle or full trailers.

Features & Benefits

  • Integrated dual modulator valve design on the 2S/2M, 4S/2M, and 4S/3M in systems for virtually any trailer application
  • Integrated dual modulator valve design on the 2S/2M, 4S/2M, and 4S/3M systems:
  • Lighter in weight
  • Requires less hardware

  • More efficient performance of air brake system
  • Individual replaceable electronic control unit (ECU) and ABS modulator valves save maintenance time and reduces cost
  • Notebook function allows VIN, trailer number, major component part number, trailer maintenance information, and freeform text to be stored in the ECU – all accessible through Meritor WABCO’s exclusive TOOLBOX™ software

  • Service interval indicator allowing a predetermined service interval to be stored within the system
  • Tamper-proof electronic odometer for tracking trailer mileage
  • Trailer diagnostics can be conducted through the tractor ABS using TOOLBOX™ software


Trailer. For literature, click here.