Specification Fits Front + Rear Passenger or Driver Side Replaces dealer part numbers:68170065AB, 68170065AC, 68170065AD, 68170065AE, 68267297AA, ALS2587, 68053861AB, 68053861AC, 68053861AD, 68231044AB, 68053861AA, ALS2588, 5S13965 Compatibility 2013-2018 Ram 1500 2019-2020 Ram 1500 Classic Models Failure Symptom ABS brake light illumination, false activation of the ABS system due to an inconsistent signal from a sensor The Anti-Lock Brake System (ABS) sensor monitors wheel speed. Common failure symptoms include: ABS Light On Brake Pulsing No / Erratic Traction or Stability Control No / Erratic ABS Operation .