Febi 28104 Accessory Drive Belt Tensioner Assembly

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Febi 28104 Accessory Drive Belt Tensioner Assembly

Brand	Febi 28104
Housing Material	Aluminium
Material	metal
Operating Mode	automatic
Outside Diameter	70.0
Width	24.0
Fits	Audi · 25 vehicles

Automatic tensioning. Maintains proper accessory drive belt tension with less manual adjustment.

Metal construction. Built with a metal body and aluminium housing for durable performance.

Accessory drive belt tensioner. Keeps the belt system properly tensioned for reliable operation.

Cross-references 06C 903 133 B for the same application. See all 1.

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Febi 28104 Accessory Drive Belt Tensioner

Febi 28104 is an automatic accessory drive belt tensioner assembly built with a metal pulley, aluminum housing, and a 70.0 mm outside diameter. It is specified for auxiliary belt applications on select Audi A4, Audi A4 Quattro, Audi A6, and Audi A6 Quattro models, with a 24.0 mm pulley surface width for proper belt tracking.

For buyers searching for an Audi A4 belt tensioner assembly or an Audi A6 accessory drive belt tensioner, Febi 28104 provides the OE-style dimensions and automatic operating mode needed for the accessory drive belt system.

Key Features

Automatic accessory drive belt tensioner assembly
Metal pulley construction for belt contact durability
Aluminum housing material
70.0 mm outside diameter
24.0 mm pulley surface width
Fits auxiliary belt applications on select Audi models
Part number: 28104

Detailed Description

Febi 28104 is an accessory drive belt tensioner assembly for the belt and cooling system category, engineered for auxiliary belt service on select 2002-2006 Audi applications. The automatic operating mode helps maintain belt tension within the accessory drive belt system, while the metal pulley and aluminum housing support the dimensional requirements listed for this part. This unit cross-references OE part number 06C 903 133 B for the same application.

Compatible With: Fits 2002-2004 Audi A4, N/A; Fits 2002-2004 Audi A4 Quattro, N/A; Fits 2002-2004 Audi A6, N/A; Fits 2002-2004 Audi A6 Quattro, N/A; Fits 2005 Audi A4, N/A; Fits 2005-2006 Audi A4 Quattro, N/A; Fits 2005-2006 Audi A6, N/A; Fits 2005-2006 Audi A6 Quattro, N/A.

What It Helps Address

Accessory belt tension loss
Belt tracking issues caused by worn pulley surfaces
Noise from a worn or unstable tensioner assembly
Uneven belt loading in the auxiliary drive system
Fitment replacement needs for Audi A4 and Audi A6 belt drive service

Installation Notes and Tips

Verify pulley width, outside diameter, and housing style against the original unit before installation. Confirm the vehicle uses the auxiliary belt application listed for Febi 28104 and inspect the belt, pulleys, and related drive components for wear before reassembly. Proper alignment in the accessory drive belt system is important for stable operation.

Quality Assurance

Febi is a recognized aftermarket brand for European vehicle components, and this tensioner assembly is built to match the listed OE-style dimensions and application requirements for Audi A4, Audi A4 Quattro, Audi A6, and Audi A6 Quattro fitment.

This part fits 25 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Body Type	Liters	Cylinders	Position	Notes
2006	Audi	A4 Quattro	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2006	Audi	A6	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2006	Audi	A6 Quattro	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2005	Audi	A4	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2005	Audi	A4 Quattro	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2005	Audi	A6	—	—	—	N/A	Pulley Surface Width (in / mm): 24; febi
2005	Audi	A6 Quattro	—	3.0L	V6	N/A	Pulley Surface Width (in / mm): 24; febi
2004	Audi	A4	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2004	Audi	A4 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2004	Audi	A4 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2004	Audi	A6	—	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2004	Audi	A6 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2004	Audi	A6 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A4	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A4 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A4 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A6	—	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A6 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2003	Audi	A6 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A4	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A4 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A4 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A6	—	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A6 Quattro	Wagon	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
2002	Audi	A6 Quattro	Sedan	—	—	N/A	Additional information: for auxiliary belt; Outer Diameter 1 (mm): 70; Operating Mode: automatic; Housing Material: Aluminium; Pulley Material: metal; Pulley Surface Width (mm): 24
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Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

06C 903 133 B

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