Audi A8/S8 AC Heater Control Adjustment Unit 4D0820511A

OEM Part #: 4D0-820-511-A (4D0820511A)

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This used Audi AC Heater Control Adjustment Unit, OEM part number 4D0820511A, is a genuine component removed from a donor vehicle. It manages the blend-door and temperature adjustments in the HVAC system—a common failure point that can cause inconsistent heating or cooling on one side of the cabin. This particular unit came from an Audi A8, A8 Quattro, or S8 equipped with either the 3.7L or 4.2L V8 (naturally aspirated).

Specifications

Specifications for AC Heater Control Adjustment Unit 4D0820511A
Fits Vehicle ModelA8, S8
Fits Vehicle MakeAudi
OEM Part No4D0-820-511-A (4D0820511A)
CategoryDash Parts

Compatible Vehicles

Fits 14 vehicle configurations across 1 make, 1997-2002.

Check your specific vehicle before ordering. This list shows year, make, and model. Some years have multiple trims or engines that use different parts, and individual listings may have additional fitment notes (e.g. “with sunroof only”). Review the full variant list below, or message us with your VIN and we’ll confirm the match.

Audi

  • A8 1997-2002 · 12 variants
  • S8 2001-2002 · 2 variants
View all 14 vehicle configurations
Full vehicle fitment list for AC Heater Control Adjustment Unit 4D0820511A
Year Make Model Trim Engine Note
1997 Audi A8 Sedan 3.7L V8
1997 Audi A8 Quattro Sedan 4.2L V8
1998 Audi A8 Sedan 3.7L V8
1998 Audi A8 Quattro Sedan 4.2L V8
1999 Audi A8 Sedan 3.7L V8
1999 Audi A8 Quattro Sedan 4.2L V8
2000 Audi A8 Quattro Sedan 4.2L V8
2000 Audi A8 Quattro L Sedan 4.2L V8
2001 Audi A8 Quattro Sedan 4.2L V8
2001 Audi A8 Quattro L Sedan 4.2L V8
2001 Audi S8 Sedan 4.2L V8
2002 Audi A8 Quattro Sedan 4.2L V8
2002 Audi A8 Quattro L Sedan 4.2L V8
2002 Audi S8 Sedan 4.2L V8

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