Shock Absorber is Regenerated from OE part. Brand: Audi Model: A6 (4F / C6 / S6 / A6L / Avant / Allroad) Side: Rear Installation Side: Left Part: Shock Absorber (Regenerated) Warranty: 1 year --------------------------------- Air Suspension Shock absorber part number: Left: 4F0616031K, 4F0616031A, 4F0616031E, 4F0616031D, 4F0616031J, 4F0616031N, 4F0616031M