Description
Restore accurate chassis height leveling and reliable air suspension response to your commercial fleet with the genuine WABCO Commercial Vehicle ECAS Solenoid Valve Assembly. Engineered specifically for heavy-duty commercial trucks, multi-axle freight haulers, and transport coaches, this OE-grade pneumatic control assembly manages airflow distribution between the air compressor, air reservoirs, and suspension bellows. Corroded solenoid coils, internal seal leakage, or electrical short circuits cause sagging vehicle corners, slow height adjustments, compressor burnout, and unsafe chassis tilting. This original WABCO assembly solves those pneumatic failures directly. It combines high-response electromagnetic valves, integrated exhaust ports, and precision pressure distribution to deliver millisecond-fast height switching, exceptional ride stability, and maximum operational efficiency in demanding transport operations.
Technical Parameters
| Category | Specifications & Technical Details |
| Millisecond High-Speed Solenoid Switching | We pair a high-response electromagnetic coil with a precision spool valve structure. As a result, it completes air spring inflation, pressure holding, or exhausting within milliseconds of receiving an ECU command. This enables precise adaptive adjustment of suspension height. |
| Multi-Circuit Precision Air Pressure Distribution | We build multiple independent solenoid valve chambers inside the unit. Based on body height sensor signals, it precisely controls the intake and exhaust volume of the left, right, front, and rear air springs. Consequently, it completely eliminates vehicle body roll or uneven load. |
| IP67/IP69K Waterproof & Dustproof Enclosure | We achieve the IP67 / IP69K extreme protection rating through a die-cast aluminum valve body and sealed electrical connector. Therefore, it completely seals out chassis-splashed mud, road de-icing salt chemical attack, and harsh weather effects. |
| OEM-Grade CAN/PWM Control Compatibility | We natively match the WABCO ECAS control unit and the vehicle chassis electronic control network. Additionally, it delivers strong electromagnetic interference (EMC) resistance. As a result, it guarantees zero-delay, noise-free solenoid valve drive commands. |
| Heavy-Duty Die-Cast Aluminum Valve Body | We die-cast the valve body from high-strength heat-treated aluminum alloy. It withstands rated working pressure up to 13 bar and millions of high-frequency alternating pressure impacts. Moreover, it never leaks or cracks. |
Applicable Car Brands & Models
Common warning symptoms include:
ECAS Fault Light on Dashboard: The instrument cluster displays active air suspension warning codes or enters a restricted limp mode.
Sagging Chassis or Inability to Level: The truck or trailer fails to lift to normal driving height, or one side sags significantly after parking.
Continuous Compressor Running: The air compressor runs constantly or overheats because leaking solenoid valves prevent the system from holding pressure.
Air Hissing from Valve Exhaust: Continuous air leakage heard around the solenoid valve block during operation or engine shutdown.
Internal air leaks typically occur when moisture, oil sludge, or microscopic carbon particles from a worn air compressor bypass the air dryer and enter the valve block. These contaminants accumulate on the internal O-rings and precision spools, preventing complete closure and causing continuous pressure loss.
Standard replacement of a mechanical solenoid valve block usually requires clearing stored legacy error codes using diagnostic tools. However, if the replacement involves reconfiguring chassis height parameters or resetting system control modules, calibrating the chassis height sensors using WABCO diagnostic software is required.
Our 1-year warranty covers all internal solenoid coil burnouts, internal pneumatic seal leaks, electrical connector defects, and non-artificial component failures under normal operating conditions. If an assembly fails within 12 months, we provide prompt replacement or warranty processing upon inspection.
