The acura part number 57110-tjb-a040-m1 is the factory original (oem) anti-lock brake system (abs) pump and control module assembly (also known as the vsa modulator) specifically designed for the 2019–2021 acura rdx equipped with all-wheel drive (awd).key specifications & compatibilityvehicle fitment: 2019, 2020, and 2021 acura rdx (awd models).placement on vehicle: front engine bay.holland interchanger code: 545-10796.system role: acts as the central actuator for the anti-lock brakes, vehicle stability assist (vsa), and traction control. it monitors wheel speed data and pulses fluid pressure to prevent wheel lockup during emergency braking maneuvers