Our remanufactured air struts are tested with the strictest OE standards, and it backed by two years Warranty. We reused OE shock to maintain OE active damping functionality. We rebuild this strut with newair spring bladder, new O-ring seal, new connectors, new CNC-machined aluminium upper and lower piston, wiring harness, air fittings, dust baffles and aluminium cans.