Heavy Duty WHT003858A Rear Right ABS Wheel Speed Sensor Fit FAW VW Audi On a FAW-Volkswagen CC (B7, 2012–2018) and an Audi Q3 8U (2013–2018), the rear wheel-speed sensors are tiny Hall-effect pick-ups pressed into the rear knuckle — no cable, just a 77 mm grey body with a 2-pin D-shaped plug. When brake dust bakes onto the tip, the sealed plug sweats, or the tone ring on the hub throws a tooth, you get the ABS and ESC lamps, a speedo that flickers, and a rear-right code