Wabco ECU/Valve Assembly S4005001030 / S400-500-103-0
2S/2M 4S/2M 4S/3M
This is a dual modulator (2-valve), 4-wheel sensor ECU unit. It consists of a Wabco S4008506020 dual modulator service valve, with a S4008506010 4- wheel sensor ECU unit mounted on top. The easiest way to identify is by locating the unit metal tag, with the part number listed (pictured).
This unit came into semi trailer use after the year 2002 & is very common on late model trailers, with a 4-wheel sensor ABS Brake System.
Parts Manager’s Note: Looking to replace an obsolete S472-500-013-0 ECU/Valve with a Wabco R955346 upgrade kit? All that is needed is to order the above unit and a S8946073120 adapter cable. These two components create a Wabco R955346 kit. Call for more information on the Wabco ECU/Valve Assembly S4005001030!