Capacities For AUDI A6 (4B_) From My 1998 And AUDI ALLROAD (4B_) Through My 2005
Features of the refrigerant system:
- Restrictor
- Reservoir
- "Denso" or "Zexel / Valeo" A/C compressors. Refer to REFRIGERANT CIRCUIT R134a
| Vehicle model | Production period | Capacity in grams | Differing features of this refrigerant circuit |
|---|---|---|---|
| Audi A6 | From 04/1997 to 11/1997 | 800 + 50 |
|
| From 11/1997 through 08/1998 | 850 + 50 |
|
Restrictors with a modified hole have been installed at the factory from 11/1997 (yellow colored). The capacity was increased by 50 g for vehicles in which a yellow colored restrictor was installed.
In order to distinguish between the two restrictor versions, the one with the smaller hole (1.54 mm) is colored yellow. The restrictor with the larger hole (1.83 mm) is not colored.
If a vehicle is equipped with a colored restrictor as replacement for a non-colored restrictor, add 50 g more refrigerant than specified in the table. In addition, the capacity specified on the label in the vehicle is to be checked and amended if necessary, or the existing label is to be replaced with one indicating the correct capacity (affix over old label).
The Audi A6 are equipped with different A/C compressors depending on engine and vehicle date of manufacture.
Production was gradually switched in 08-09/1998 from A/C unit version "1" to A/C unit version "2". Since the evaporator was also changed along with the A/C unit, the capacity could have been reduced.
The two A/C unit versions can be identified on the basis of certain characteristics described in the vehicle-specific repair information.
Beginning from production year 2006, the name of the "Zexel" A/C compressor was changed from "Zexel" to "Valeo".
| Vehicle model | Production period | Capacity in grams | Differing features of this refrigerant circuit |
|---|---|---|---|
Audi A6
|
From 08/1998 to 04/1999 | 750 + 50 |
|
Audi A6
|
|
750 + 50 |
|
| Vehicle model | Production period | Capacity in grams | Differing features of this refrigerant circuit |
|---|---|---|---|
Audi A6/Audi allroad
|
|
550 + 50 |
|
Audi A6/Audi allroad
|
From 04/1999 | 650 + 50 |
|
Audi A6
|
From 05/2001 | 550 + 50 |
|
Condensers with A/C Pressure Switch -F129- or High Pressure Sensor -G65- are supplied for production as part number XXX XXX 401 X. As a replacement part, this condenser is supplied without A/C Pressure Switch -F129- or High Pressure Sensor -G65- as part number XXX XXX 403 X.
From 10/1998 to 12/1998, vehicles with 6-cylinder diesel engine (initially about 10, 000 vehicles) were equipped with condensers of a different design. The capacity is different for vehicles with these condensers. The condensers can be identified on the basis of certain characteristics and the part number. Refer to CAPACITIES FOR AUDI A6 (4B_) FROM MY 1998 AND AUDI ALLROAD (4B_) THROUGH MY 2005 .
The Audi A6 are equipped with different A/C compressors depending on engine and vehicle date of manufacture.
On condenser replacement, observe part number index (different flat pipe versions, flat pipe dimensions 16 x 1.7 mm, 18 mm x 1.7 mm or 20 mm x 3 mm) and the different capacities involved. If a condenser with a different part number index is installed, the capacity specified on the label must be checked and amended if necessary or a label indicating the modified capacity must be affixed over the existing label. The part number can be found on a sticker affixed on the underside of the condenser.
From 04/1999, production was gradually switched from condensers with flat pipe dimensions 20 mm x 3 mm to condensers with flat pipe dimensions 18 mm x 1.7 mm or 16 mm x 1.7 mm. The change in production took place gradually during the course of 1999 depending on the engine and existing supplies of the different versions. Refer to Electronic parts information (ETKA) for precise assignment of the different condensers, refer to parts information.
For vehicles from 04/1999 that are equipped with 6-cylinder diesel engine, a condenser with index "D", "G", "R" or "K" may be installed. Pay attention to the different capacities. Refer to appropriate service information.
| Vehicle model | Production period | Capacity in grams | Differing features of this refrigerant circuit |
|---|---|---|---|
Audi A6
|
|
550 + 50 |
|
Audi A6
|
From 03/1999 to 02/2000 | 650 + 50 |
|
The 8-cylinder Audi A6 has a "Denso" A/C compressor.
Production was gradually converted in 08-09/1998 from A/C unit version "1" to A/C unit version "2". Vehicles with an 8-cylinder engine are only equipped with A/C unit as of version "2".
The different A/C unit versions can be identified on the basis of certain characteristics described in the repair information. Refer to appropriate service information
For vehicles with 8-cylinder engines, different condensers were installed. Exclusive use was made for USA vehicles of condensers with part number 4B3 260 401 (403) C, D, E.
In 03/1999, production was gradually switched from condensers with part number 4B3 260 401 (403) B to condensers with part number 4B3 260 401 (403) C.
If the condenser installed is replaced by a condenser with a different part number, the capacity specified on the label must be amended and, if necessary, the label indicating the modified capacity must be affixed over the existing label. The part number can be found on a sticker attached to the bottom of the condenser. Refer to appropriate service information.
Determining dimensions of flat pipes from condenser
Production was gradually switched to a condenser with smaller flat pipes starting from 11/08/1998 (initially on Audi A6 with a 6-cylinder diesel engine).
Observe the part number when replacing a condenser (sometimes the only distinguishing feature). Refer to the parts information.
Condensers -A- with flat pipe dimensions -B- = 20 mm and -C- = 3.0 mm must be filled with more refrigerant than condensers -D- with flat pipe dimensions -E- = 18 mm or 16 mm and -F- = 1.7 mm. Refer to the parts information.
If the condenser is replaced, observe flat pipe dimensions. If a condenser with different dimensions is installed, the sticker -A- specifying the capacity for refrigerant R134a is also to be replaced, or the old capacity specification is to be removed and the new capacity is to be noted, for example using a waterproof marker. Refer to the parts information.