Remy 12665 Alternator

Remanufactured Alternator for Cadillac CTS

This Remy Premium Remanufactured alternator is built for 2004-2007 Cadillac CTS applications with a 140 amp output. It is a direct-fit charging system replacement for vehicles using a Nippondenso OE design, with internal regulation and a clockwise rotation.

Key Features

• 140 amp amperage rating for stable charging output
• Remanufactured Remy Premium Remanufactured unit
• OE manufacturer design reference: Nippondenso
• Internal fan type and internal voltage regulator
• Pulley included for installation on the correct application
• 12V alternator with clockwise rotation

Product Details

Remy part number 12665 is a remanufactured alternator engineered for the Cadillac CTS charging system used from 2004 through 2007. This unit follows the Nippondenso OE configuration and is specified with a 140 amp rating, 12-volt operation, internal fan design, and internal voltage regulation. The included pulley and clockwise rotation help match the original equipment layout for the vehicle’s charging setup. If you are replacing a worn or failing alternator on a Cadillac CTS, part number 12665 provides the correct electrical and mechanical specifications for the application.

Remy Premium Remanufactured products are positioned for OE-style replacement needs, with attention to the original design requirements of the charging system. This alternator is also referenced by part number 12665 in catalog searches for Cadillac CTS alternator replacement and 140 amp remanufactured alternator applications.

This part cross-references Nippondenso-style OE numbers (e.g., 104210-3191, 104210-4430) for the same application.

What It Helps Resolve

• Battery warning light caused by alternator output loss
• Low charging voltage at the battery
• Dim lights or electrical instability while driving
• Charging system failure from a worn internal regulator
• Noise or performance issues from a failing alternator assembly

Installation Notes and Tips

Verify the vehicle’s original alternator specifications before installation, including amperage rating, rotation direction, voltage, and regulator type. Confirm that the pulley style and OE manufacturer reference match the existing charging system on the Cadillac CTS. Inspect the belt, electrical connectors, and battery condition during replacement to help prevent repeat charging issues.

Quality Assurance

Remy Premium Remanufactured alternators are remanufactured to meet the application’s OE-style configuration requirements. Part number 12665 is built for 2004-2007 Cadillac CTS charging system service and is specified to match the original Nippondenso-based design.