Valeo 439554 Alternator

Valeo 439554 Alternator for Audi A6

The Valeo 439554 alternator is a 12-volt charging system component built for select Audi applications, including the Audi A6 and Audi A6 Quattro. With a 180-amp output, internal fan, internal regulator, and clockwise rotation, it is specified for dependable electrical performance in vehicles that require OE-level charging support.

As part of the Valeo OE family, this alternator reflects Valeo’s long history in electrical systems and original equipment supply. The 439554 is a 100% new unit, which helps reduce the risk associated with remanufactured components and supports consistent charging performance in demanding daily driving conditions.

Key Features

• Part number: 439554
• 12-volt alternator with 180-amp amperage rating
• Internal fan design for compact packaging
• Internal regulator for integrated voltage control
• Clockwise rotation direction
• 6-groove pulley configuration
• Aluminium housing
• Valeo OE family construction
• Technical number: TG17C044

Product Details

Valeo 439554 is an OE-style alternator engineered for vehicles that need stable charging output and consistent electrical system support. It is listed for 2006-2008 Audi A6 and 2005-2008 Audi A6 Quattro applications, with fitment notes identifying Valeo as the OE supplier for these vehicles. If you are replacing a worn charging unit on an Audi A6 or Audi A6 Quattro, this alternator provides the correct 180-amp specification and matching internal-regulator design.

This part cross-references Bosch AL9365X for the same application.

Common Issues This Part May Resolve

• Battery warning light caused by alternator output loss
• Low charging voltage at idle or under electrical load
• Dim lights or unstable electrical performance
• Charging system failure from a worn alternator
• Starting problems related to insufficient battery recharge

Installation Notes and Tips

Confirm pulley groove count, rotation direction, amperage rating, and connector fitment before installation. This alternator is listed for Audi A6 and Audi A6 Quattro models with a 6-groove pulley and clockwise rotation, so matching the original unit specifications is important for proper operation. Inspect the belt, tensioner, battery condition, and charging cables during replacement to help verify the repair.

Quality Assurance

Valeo has supplied electrical systems since 1923 and is recognized as an original equipment alternator supplier. The Valeo 439554 is a new alternator built to OE-family standards for select Audi charging system applications.