Air Suspension is Regenerated from OE Vibracoustic part. Brand: Audi  Model: A6 (C5 / 4B / Allroad) Side: Front Installation Side: Left / Right Part: Air Suspension (Regenerated) Warranty: 2 years (air spring), 1 year shock absorber (hydraulic part) --------------------------------- OEM Part Numbers: Left Air Suspension part number: 4Z7616051D, 4Z7616051B Right Air Suspension part number: 4Z7616051D, 4Z7616051B