Remy 12894 Alternator

Remanufactured BMW Alternator for 180-Amp Charging

The Remy Premium Remanufactured Alternator Part Number 12894 is a 12-volt, 180-amp charging unit built for select BMW applications. It uses an internal fan, internal voltage regulator, clockwise rotation, and includes the pulley for a direct-fit replacement in supported vehicles.

Key Features

• Remy Premium Remanufactured alternator
• 180 amp amperage rating for higher electrical demand
• 12V system with internal voltage regulator
• Internal fan design
• Pulley included
• Clockwise rotation
• OE manufacturer: Valeo
• Part number 12894

Product Details

Remy 12894 is a remanufactured alternator engineered for BMW charging-system applications that require a Valeo-style 180-amp unit. It is listed for the BMW X5, 545i, 645Ci, 745i, and 745Li across the 2002-2006 model years, including air-cooled alternator applications noted in the fitment data. This alternator is a practical replacement when the original unit no longer maintains proper system voltage or charging output.

This part cross-references BMW OE numbers 12-31-7-524-972 and 12-31-7-525-440 for the same application.

Common Problems This Part Can Address

• Battery warning light caused by low alternator output
• Weak charging performance at idle or under electrical load
• Voltage instability affecting vehicle electronics
• Battery drain symptoms related to charging-system failure
• No-charge condition from a worn or failed alternator

Installation Notes and Tips

Verify pulley style, rotation direction, voltage rating, and amperage before installation. Confirm the vehicle uses the listed Valeo-style 180-amp alternator configuration, especially on BMW X5, 545i, 645Ci, 745i, and 745Li applications. Inspect the drive belt, electrical connectors, and charging cables during replacement to help ensure proper system operation after installation.

Quality Assurance

Remy Premium Remanufactured parts are rebuilt to meet application-specific charging requirements using the OE manufacturer reference listed for this unit. Part number 12894 is intended for direct replacement in the confirmed BMW fitments shown above.