SK-3936 is an Arnott designed new shock for the rear of 2000-2006 BMW X5 (E53) vehicles. The new shock is built with a custom-tuned, velocity-sensitive, damper calibrated to provide an smooth yet responsive ride. This completely new shock includes a new polyurethane bump stop, protective dust boot, and new top and bottom mounts along with coil resistor to eliminate any suspension dashboard warning lights. This replacement BMW rear shock is assembled by Arnott in the USA.