WAI 13976N Alternator

WAI 13976N Alternator for BMW V12 Charging Systems

The WAI 13976N is a 100% new alternator built for BMW charging systems that require 180 amps of output. It is engineered with an internal regulator, a liquid-cooled fan design, and a serpentine pulley setup to match the original application requirements.

Key Features

• 180 amp amperage rating for high electrical demand
• 100% new unit, not remanufactured
• Liquid cooled fan type
• Internal regulator
• Clockwise (right) rotation direction
• 6-groove pulley included
• Serpentine belt pulley design
• BOSCH family application

Product Details

WAI 13976N alternator is built with proprietary components and manufacturing processes to support long service life and consistent performance in demanding BMW electrical systems. This alternator is a direct-fit style replacement for select BMW 760Li, 760i, 745i, and 745Li applications, including watercooled and 180 amp option configurations. If you are replacing a failing BMW alternator on a 2002-2008 BMW 760Li or related 7 Series V12 model, this part number 13976N provides the specified output and pulley configuration needed for the vehicle.

This part cross-references Dorman - HELP 13976 for the same application.

What This Alternator Helps Address

• Battery warning light caused by low charging output
• Dim lights or electrical instability under load
• Charging system failure on BMW 760Li, 760i, 745i, or 745Li models
• Voltage drop from a worn or failing alternator
• Noise or belt drive issues related to a mismatched pulley setup

Installation Notes and Fitment

• Fits 2003-2008 BMW 760Li, N/A
• Fits 2004-2006 BMW 760i, N/A
• Fits 2004 BMW 745i, N/A, To 10/2003
• Fits 2004 BMW 745Li, N/A, 180 Amp Option
• Fits 2002-2003 BMW 745i, N/A, Watercooled Alt, 180 Amp
• Fits 2002-2003 BMW 745Li, N/A, Watercooled Alt, 180 Amp

Verify pulley groove count, belt type, rotation direction, and amperage rating before installation. This alternator uses an internal regulator and includes the pulley, so confirm the vehicle’s original charging system specification matches the listed fitment notes. For BMW 745i and BMW 745Li applications, pay close attention to the watercooled alternator and 180 amp option details.

Quality Assurance

WAI builds this alternator as a new replacement unit using proprietary components and processes to support maximum life and performance in the intended BMW charging system applications.