Remy 12505 Alternator

Remanufactured Alternator for Volkswagen Golf and Jetta

Remy Premium Remanufactured alternator Part Number 12505 is a 12-volt charging system component built for select Volkswagen Golf and Volkswagen Jetta applications. With a 140-amp output, internal fan, internal voltage regulator, and included pulley, it supports stable electrical performance in vehicles that need dependable charging output.

The Remy Premium Remanufactured line focuses on remanufactured OE-style replacement parts built around original equipment specifications. This alternator is remanufactured from Bosch OE manufacturer architecture and is configured for clockwise rotation.

Key Features

• 140 amp alternator output for select Volkswagen charging systems
• 12-volt electrical system with internal voltage regulator
• Internal fan design for alternator cooling
• Pulley included for application-specific fitment
• Clockwise rotation
• Remanufactured OE-style replacement built from Bosch-based design
• Part Number 12505 for easy identification

Detailed Description

This Remy alternator is built for drivers searching for a 140 amp alternator for Volkswagen Golf or Volkswagen Jetta models with the correct belt and pulley configuration. It fits 2013-2014 Volkswagen Golf, 2011-2014 Volkswagen Jetta, 2010-2011 Volkswagen Golf, and 2005-2010 Volkswagen Jetta, with notes calling out 5-groove pulley and single sided V-ribbed belt applications where specified. The unit is a remanufactured 12V alternator with an internal regulator, making it a direct electrical replacement for the listed vehicles.

Part Number 12505 is also cross-referenced to 0-124-525-102 and 07K-903-023A for the same application. If you are replacing a worn Volkswagen Golf alternator or Volkswagen Jetta alternator, verify belt style, pulley configuration, and electrical connector match before installation.

Common Problems This Part Can Address

• Battery warning light caused by weak charging output
• Low system voltage during driving or idle
• Dim headlights or unstable electrical performance
• Charging failure from a worn alternator
• Accessory or starting issues related to insufficient alternator output

Installation Notes and Tips

Confirm the vehicle year, engine configuration, belt type, and pulley style against the listed fitment before installation. Check the charging circuit, battery condition, and belt drive components during replacement to help avoid repeat failures. Because this alternator uses an internal voltage regulator and included pulley, match the original setup carefully to ensure proper operation.

Quality Assurance

Remy Premium Remanufactured parts are remanufactured to OE-style specifications using Bosch-based original equipment architecture. This alternator is built for the listed Volkswagen Golf and Volkswagen Jetta applications and is identified by Part Number 12505.