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Audi Q7 Touarge Porsche Audi Air Suspension Parts Air Suspension Spring Rear 7L8616503B Specification Suitable For: Audi Q7 Touarge Porsche Position: Rear Original part number: 7L8616503B Air Spring An air spring is a rubber and fabric bladder that holds air pressure to support a load and isolate passengers and cargo from the shock of motion caused by road irregularities. As the air pressure increases, the air spring can support more load while the spring rate increases. The