BMW 1 Series F52 Sedan (2017 -) Rear Lower Arm Bush - PFR5-1313BLK PFR5-1313 is made from our Black Series 95A material for ultimate chassis control. Replaces inner and outer positions on rear lower arms. - NOTE: Price is for CAR KIT, NOT per bush… Powerflex price their bushes individually, but we have combined the quantities to make it simple!