New strut upper mounting nuts and a lower mounting bolt nut will be required on refitting. Begin by chocking the front wheels, jacking up the rear of the car, and supporting it on axle stands before removing the relevant rear roadwheel. For models with rear disc brakes, secure the disc to the hub with a wheel bolt while the wheel is removed. If the vehicle has self-levelling rear suspension, depressurise the hydraulic system, clean the area around the hydraulic union on the top of the strut, unscrew the union nut, and disconnect the hydraulic pipe, ensuring to plug or cover the hose end and strut port to minimise fluid loss and prevent dirt entry. Position a jack underneath the rear axle and raise it to support the axle weight. Slacken and remove the nut, then withdraw the lower mounting bolt securing the strut to the axle, discarding the nut and preparing to use a new one on refitting. Next, slacken and remove the upper mounting nuts, lowering the axle slightly to manoeuvre the strut assembly out from underneath the vehicle, discarding the mounting nuts for new ones on refitting. For refitting, manoeuvre the strut into position, refit the lower mounting bolt, and screw on the new nut without tightening it yet. Raise the axle and locate the strut upper mounting on its studs, fitting the new upper mounting nuts and tightening them to the specified torque setting. For models with self-levelling rear suspension, reconnect the hydraulic pipe to the strut and tighten the union nut to the specified torque. Refit the roadwheel, lower the vehicle to the ground, and tighten the wheel bolts to the specified torque. With the vehicle resting on its wheels, rock the car to settle the strut in position, then tighten the lower mounting bolt to the specified torque setting. Finally, for models with self-levelling rear suspension, check the hydraulic fluid level as part of the weekly checks.