How to remove and reinstall the lower engine cover and viscous fan while ensuring correct Drive Belt routing in 2.7 liter or 2.8 liter V6 engine on Audi A6?

Take off the under engine cover. To counterhold the viscous fan pulley, use a dual pin tool, and use a 32 mm open-end wrench to loosen the viscous fan, lift it out. To lock the tensioner in the release mode, rotate the tensioner with the 17 mm box wrench until the hole in the tensioner is in line with the front engine cover. Insert a steel drift. Mark the direction of rotation of the belt before removing it if it is going to be reused. When reinstalling the belt, route it correctly, install the belt in the same direction marked when removing it, ensure that the belt is seated properly in the grooves of the pulleys, and finally place it on the A/C compressor pulley. To release tension, use the 17 mm box wrench to remove the steel locking drift. Reinstall the viscous fan, which has left-handed threads. Run the engine to ensure the belt runs in the correct order and reinstall engine covers afterwards.

How to inspect and maintain the Drive Belt on Audi A6?

Take off upper and lower engine covers. The accessory belt has a top cover, tension cords and base material. At intervals, manually turn the engine with a suitable wrench at the vibration damper or pulley and inspect the belt from above or below for conditions including splits, core frac tures, separation between layers, chunking or breaking of base material, fraying of tension cords, flank wear flaking, fraying, chunking, glazing, hardening and surface cracking. Also oil and grease contamination. Upon occurrence of one of these characteristics, replace the belt and refer maintenance tables for corresponding routine replacement intervals.

Genuine Audi A6 Drive Belt

Serpentine Belt

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8 Drive Belts found

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Audi A6 Serpentine Belt Part Number: 06L-903-137-A
$30.74 MSRP: $40.99
You Save: $10.25 (26%)
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Product Specifications
- Other Name: Ribbed Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2016-2018 Audi A6 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS
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Audi A6 Water Pump Belt Part Number: 06K-121-605-C
$32.61 MSRP: $43.48
You Save: $10.87 (25%)
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Product Specifications
- Other Name: Tooth Belt; Belt, Drive Belt
- Replaces: 06K-121-605
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2016-2018 Audi A6 | Premium, Premium Plus, Sport | 4 Cyl 2.0 L GAS
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Audi A6 Serpentine Belt Part Number: 06E-903-137-J
$83.30 MSRP: $116.67
You Save: $33.37 (29%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Ribbed Belt
- Replaces: 06E-903-137-A
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2006-2011 Audi A6 | Base | 6 Cyl 3.2 L GAS
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Audi A6 Serpentine Belt Part Number: 078-903-137-BC
$56.37 MSRP: $77.65
You Save: $21.28 (28%)
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Product Specifications
- Other Name: Ribbed Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1998-2001 Audi A6 | Base | 6 Cyl 2.8 L GAS
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Audi A6 Serpentine Belt Part Number: 06J-260-849-F
$29.86 MSRP: $39.82
You Save: $9.96 (26%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: Ribbed Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2017 Audi A6 | Premium, Premium Plus | 4 Cyl 2.0 L GAS
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Audi A6 Water Pump Belt Part Number: 06H-121-605-E
$34.49 MSRP: $45.99
You Save: $11.50 (26%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Tooth Belt; Drive Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2012-2015 Audi A6 | Premium, Premium Plus | 4 Cyl 2.0 L GAS
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Audi A6 Serpentine Belt Part Number: 078-903-137-BJ
$54.45 MSRP: $75.00
You Save: $20.55 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Ribbed Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 2002-2004 Audi A6 | Base | 6 Cyl 3.0 L GAS
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Audi A6 Serpentine Belt Part Number: 078-903-137-AQ
$39.55 MSRP: $54.48
You Save: $14.93 (28%)
Ships in 1-2 Business Days
ADD TO CART
Product Specifications
- Other Name: Ribbed Belt; Drive Belt
- Warranty: This genuine part is guaranteed by Audi's factory warranty.
Fits the following Vehicles:
- 1995-1998 Audi A6 | Avant, Base | 6 Cyl 2.8 L GAS

Audi A6 Drive Belt

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Audi A6 Drive Belt Parts and Q&A

Serpentine Belt
078-903-137-BJ
Q: How to remove and reinstall the lower engine cover and viscous fan while ensuring correct Drive Belt routing in 2.7 liter or 2.8 liter V6 engine on Audi A6?
A:
Take off the under engine cover. To counterhold the viscous fan pulley, use a dual pin tool, and use a 32 mm open-end wrench to loosen the viscous fan, lift it out. To lock the tensioner in the release mode, rotate the tensioner with the 17 mm box wrench until the hole in the tensioner is in line with the front engine cover. Insert a steel drift. Mark the direction of rotation of the belt before removing it if it is going to be reused. When reinstalling the belt, route it correctly, install the belt in the same direction marked when removing it, ensure that the belt is seated properly in the grooves of the pulleys, and finally place it on the A/C compressor pulley. To release tension, use the 17 mm box wrench to remove the steel locking drift. Reinstall the viscous fan, which has left-handed threads. Run the engine to ensure the belt runs in the correct order and reinstall engine covers afterwards.
Serpentine Belt
078-903-137-BC
Q: How to inspect and maintain the Drive Belt on Audi A6?
A:
Take off upper and lower engine covers. The accessory belt has a top cover, tension cords and base material. At intervals, manually turn the engine with a suitable wrench at the vibration damper or pulley and inspect the belt from above or below for conditions including splits, core frac tures, separation between layers, chunking or breaking of base material, fraying of tension cords, flank wear flaking, fraying, chunking, glazing, hardening and surface cracking. Also oil and grease contamination. Upon occurrence of one of these characteristics, replace the belt and refer maintenance tables for corresponding routine replacement intervals.