This rear left/right ABS wheel speed sensor is precision manufactured to strict OEM standards, directly replacing OE part numbers 34523405907, 34523420331, 3405907 and 3420331. It is specially designed for BMW X3 E83 models, compatible with both rear left driver side and rear right passenger side positions. Built with high-sensitivity magnetic induction components and anti-interference circuit design, it accurately collects real-time wheel speed data and transmits stable, clear signals to the vehicle's ABS control module, effectively supporting normal operation of the anti-lock braking system, traction control and vehicle stability control functions. The sensor adopts a 1:1 original structural design with a standard OEM connector, precise mounting position and proper wiring length, enabling true plug-and-play installation without any modification, wire cutting or splicing. Its fully sealed, rugged housing provides excellent protection against water, dust, road salt, vibration and gravel impact, ensuring reliable performance and long service life in various road and weather conditions.