Capacities For AUDI A6 (4B_) From 1998 And AUDI ALLROAD Through My 2005

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2018 Audi S6, 2018 Audi A6 Quattro, 2018 Audi A6, 2017 Audi S6, and 2017 Audi A6 Quattro. However, it is still accessible from the selected car via links, so may be relevant.

Features of the refrigerant system:

Restrictor
Reservoir
"Denso" or "Zexel/Valeo" A/C compressors with A/C Clutch -N25-. Refer to REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB] (vehicle-specific repair information) and to the parts information.

Vehicle model	Production period	Total quantity of oil in refrigerant circuit in cm³	Quantity of refrigerant oil in replacement compressor in cm³	Differing features of this refrigerant circuit
Audi A6/Audi Allroad 4-cylinder gasoline engine except 2.0L 6-cylinder gasoline engine except 3.0L	From 04/1997 all	250 + 50	250 + 50	See notes below
Audi A6/Audi Allroad 4-cylinder diesel engine 6-cylinder diesel engine (see notes for Audi Allroad)	From 04/1997 to 05/2001	250 + 50	250 + 50	See notes below
Audi A6 8-cylinder engine (with chain-driven camshaft)	From 04/1997 all	250 + 50	250 + 50	See notes below

NOTE:

The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On A/C compressor replacement, the quantity of oil in the A/C compressor is therefore to be adjusted. Refer to REFRIGERANT CIRCUIT COMPONENTS, REPLACING .

The Audi A6 are equipped with different A/C compressors depending on engine and production period.

From MY 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. For the Audi Allroad with 6 cylinder diesel engine, change over as you would a MY 2003 vehicle. Refer to REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB]

Beginning from production year 2006, the name of the "Zexel" A/C compressor was changed from "Zexel" to "Valeo".

Features of the refrigerant system:

Restrictor
Reservoir
"Denso" A/C compressor with A/C Compressor Regulator Valve -N280-. Refer to REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB]

Vehicle model	Production period	Total quantity of oil in refrigerant circuit in cm³	Quantity of refrigerant oil in replacement compressor in cm³	Differing features of this refrigerant circuit
Audi A6 4-cylinder gasoline engine 2.0L 6-cylinder gasoline engine 3.0L	All	220 + 20	220 + 20	Compressor type "6 SEU 12" or "7 SEU 16" (see notes below)
Audi A6/Audi Allroad 4-cylinder diesel engine 6-cylinder diesel engine (see notes for Audi Allroad)	From 05/2001	245 + 20	245 + 20	Compressor type "6 SEU 12" or "7 SEU 16" (see notes below)
Audi Allroad 8-cylinder engine (with chain-driven camshaft)	All	220 + 20	220 + 20	A/C compressor type "7 SEU 17" (see notes below)

NOTE:

The Audi A6 are equipped with different A/C compressors depending on engine and production period.

The replacement A/C compressor with an A/C Compressor Regulator Valve -N280- can have different oil capacities; pay close attention to the exact part number. Refer to REFRIGERANT CIRCUIT [For engine(s) CTUA, CAED, CREH, CEUC, CTGE, CREC, CYNB, CPNB]

The reason for the different oil capacities inside the A/C compressor is due to the design of the A/C compressor (with or with an oil separator on the high pressure connection) or to the design of the refrigerant circuit if the A/C compressors are have the identical design. Pay attention to the different capacities. Too much oil in the circuit leads to higher pressures and reduces cooling performance of the system. Too little oil may lead to lubrication problems in the compressor.

A data plate may be attached to the A/C compressor by the manufacturer, indicating the part number and refrigerant oil quantity.