Included (4 pcs) 2 x Front Disc Brake Pad Wear Sensor (Both Sides) 2 x Rear Disc Brake Pad Wear Sensor (Both Sides) Engineered with high-quality material to ensure long-term performance and the capability to resist high temperatures Made with corrosion-free coating for highest durability on the market Direct plug-in OE replacement for proper fit and function for an unmatched experience mPulse offers an extensive range of sensors that restores your vehicle to factory levels of performance Part Reference Numbers : WS490 19101 2BWS0277 34356792289 WK934 EWS160 PWS290 Interchanges: N/A, WS490, 19101, 2BWS0277, 34356792289, WK934, EWS160, PWS290, N/A, WS491, 19065, 2BWS0276, 34356792292, WK933, EWS161, PWS291.