Valeo 439636 Alternator

Valeo OE Alternator for BMW Charging Systems

Restore stable charging performance with this Valeo OE alternator, part number 439636. Built as a 12-volt, 230-amp unit with an internal regulator and internal fan, it matches the demands of BMW electrical systems that require consistent output under load.

Valeo’s OE alternator family is known for original-equipment application coverage, and this premium replacement is 100% new. It uses an aluminium housing, a clockwise rotation, and a 7-groove serpentine pulley for the specified BMW applications.

Key Features

• 12-volt alternator with 230-amp output
• Internal regulator and internal fan design
• Clockwise rotation
• 7-groove pulley for serpentine belt systems
• Aluminium housing for OE-style fit and construction
• Valeo OE family replacement, part number 439636

Detailed Description

This Valeo alternator is engineered for BMW charging-system applications that call for high electrical output and OE-style fitment. It is listed for models including BMW X5, BMW X6, BMW 550i, BMW 550i xDrive, BMW 550i GT, BMW 550i GT xDrive, BMW 650i, BMW 650i xDrive, BMW 750i, BMW 750i xDrive, BMW 750Li, and BMW 750Li xDrive across the confirmed model years. If you are searching for a BMW X5 alternator 230 amp or a BMW 750Li alternator replacement, this part number 439636 is built for those applications.

Valeo has supplied original equipment alternators since 1923, and this OE family unit reflects that background with a 12V charging design, internal regulation, and a serpentine-belt pulley setup. This part cross-references Remy 12945 and BBB Industries 11393 for the same application.

What It Helps Address

• Low charging output or battery warning lights
• Electrical system voltage drop under accessory load
• Alternator noise or charging instability
• Failure of an aging OE alternator
• Charging concerns on BMW 550i, 750i, X5, and X6 applications

Installation Notes and Tips

Verify pulley groove count, rotation direction, amperage rating, and connector match before installation. Confirm the vehicle’s charging-system requirements and belt routing for the BMW application before replacing the alternator. Because this unit uses an internal regulator, system diagnosis should include battery condition, belt condition, and charging-circuit testing before final installation.

Quality Assurance

Valeo positions this alternator within its OE-focused electrical lineup and states that the unit is 100% new, reducing the risk associated with remanufactured components. The design also reflects Valeo’s charging-system engineering work, including technology aimed at maintaining voltage stability and supporting fuel economy.

• Fits 2008-2014 BMW X6, N/A
• Fits 2011-2013 BMW 550i, N/A
• Fits 2011-2013 BMW 550i xDrive, N/A
• Fits 2010-2013 BMW X5, N/A
• Fits 2010-2012 BMW 550i GT, N/A
• Fits 2010-2012 BMW 550i GT xDrive, N/A
• Fits 2012 BMW 650i, N/A
• Fits 2012 BMW 650i xDrive, N/A
• Fits 2009-2012 BMW 750i, N/A
• Fits 2010-2012 BMW 750i xDrive, N/A
• Fits 2009-2012 BMW 750Li, N/A
• Fits 2010-2012 BMW 750Li xDrive, N/A