Valeo 439814 Alternator

Valeo 439814 Alternator Overview

The Valeo 439814 alternator is a 12-volt charging system component built for Audi and Volkswagen applications that require a 140-amp output. As part of the Valeo OE family, this alternator reflects Valeo’s long-standing role as an original equipment supplier, with an internal fan, clockwise rotation, and a 6-groove pulley for proper belt drive alignment.

For drivers searching for a Valeo alternator 439814 for Audi A3, S3, TT Quattro, TTS Quattro, Q3 Quattro, or Volkswagen Golf R, this OE-style replacement is a direct-fit charging solution for the listed vehicles.

Key Features

• Part number: 439814
• 12-volt alternator with 140-amp output
• Internal fan design for integrated cooling
• Clockwise rotation direction
• 6-groove pulley configuration
• Aluminium housing for a lightweight, durable build
• Valeo OE family component for listed Audi and Volkswagen applications
• Technical number: TG14C104

Product Line Details

Valeo’s Alternator line is rooted in OE electrical system engineering. This unit is part of the Valeo OE family and is built as a 100% new alternator, which helps avoid the wear concerns associated with reused internal components. Valeo also notes its alternator development has focused on stable voltage delivery and improved fuel economy performance in OE applications.

Detailed Description

Valeo 439814 is a 140-amp alternator engineered for 12-volt charging systems in select Audi and Volkswagen vehicles. It is listed for 2013-2018 Audi A3, A3 Quattro, S3, TT Quattro, TTS Quattro, and Q3 Quattro, plus 2015-2017 Volkswagen Golf R. This part cross-references Four Seasons 20354 for the same application. If you need a replacement alternator for an Audi A3 or Volkswagen Golf R with OE-style fitment, this Valeo unit matches the listed rotation, pulley, and electrical specifications.

What This Alternator Helps Address

• Battery warning lights caused by weak charging output
• Low system voltage during driving or idle conditions
• Electrical accessories that dim or operate inconsistently
• Charging system noise or failure from a worn alternator
• Fitment issues when replacing an OE-style Audi or Volkswagen alternator

Installation Notes and Tips

Verify the vehicle’s build date and engine-specific application before ordering, especially on 2017 Audi A3, A3 Quattro, S3, TT Quattro, and TTS Quattro models where notes split by production date. Confirm the 6-groove pulley, clockwise rotation, 12-volt system, and 140-amp rating match the original unit before installation. Check belt condition, electrical connectors, and charging system wiring during replacement to help ensure proper operation.

Quality Assurance

Valeo is a recognized OE supplier in electrical systems, and this alternator is part of the Valeo OE family. The 100% new construction supports consistent replacement quality for the listed Audi and Volkswagen applications.