Buy 2001 Audi A6 A/C Receiver Drier. 2.7 LITER. 2.7, 2.8 & 4.2 LITER, V6. 4.2 LITER. A6/S6; 2.7L - OEM Audi Part # 4B0820193A (4B0-820-193-A)

Air Conditioning (A/C) Receiver Drier. Dehydrator.
A/C Receiver Drier.

A/C Receiver Drier

Fits A6, allroad

2.7 LITER. 2.7, 2.8 & 4.2 LITER, V6. 4.2 LITER. A6/S6; 2.7L. Allroad.
Air Conditioning Receiver Drier Assembly - Repair or Replace
The receiver drier in your A/C system contains a desiccant that protects its metal components as well as acting as a filter to prevent damage to the rest of your system. They also frequently include a pressure switch that signals your A/C compressor to turn on or off. Your 2001 Audi A6 should get a new receiver drier, or accumulator, any time your air conditioning is undergoing repairs.