Bosch AL0789N Alternator
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Bosch
 Alternator (New)

Bosch AL0789N Alternator

Brand Bosch AL0789N
Voltage 14
Plug Clock Rear View Main Mounting Ear at 6 O Clock 1
Fan Type Internal
Rotation Direction Clockwise
One Wire Capable No
Pulley Included Yes
Pulley Groove Quantity 6
Case Color Aluminum
Outside Pulley Diameter 50
Regulator Type Internal
Case Material Aluminum
Amperage Rating 150
New Or Remanufactured New
Original Equipment Manufacturer Names Bo
Pulley Type 6s
Pulley Type / Belt Type (Alternator) 6s
Product line Alternator (New)
Fits Mercedes-Benz · 42 vehicles

New alternator. Built and tested for dependable charging performance.

Aluminum case. Lightweight construction helps resist corrosion.

Internal regulator. Integrated design simplifies the charging system.

Cross-references 0121541302, 0131548202 and 0131548602 for the same application. See all 4.

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Bosch AL0789N Alternator for Mercedes-Benz

The Bosch AL0789N is a new 14-volt alternator built for dependable charging performance in select Mercedes-Benz applications. It features an internal regulator, internal fan, clockwise rotation, and a 6-groove pulley to match the original charging system layout.

Key Features

  • 14-volt alternator with 150-amp output
  • New Bosch Premium Alternator construction
  • Internal regulator and internal fan
  • Clockwise rotation
  • Included pulley with 6-groove, 6S belt type
  • Aluminum case and aluminum case color
  • Outside pulley diameter: 50 mm
  • One-wire capable: No

Product Details

Bosch Premium Alternators are engineered, assembled, and tested for consistent electrical performance and reliability. The AL0789N is designed for Mercedes-Benz charging systems that require a 14-volt alternator with a 6-groove pulley and internal voltage regulation. This part number, AL0789N, is used across multiple Mercedes-Benz platforms, including G500, S500, and E500 applications, and it also cross-references Bosch OE-style numbers 0121541302 and 0131548202 for the same application.

Compatible With: 2002-2008 Mercedes-Benz G500, 2002-2006 Mercedes-Benz CL500, 2006 Mercedes-Benz CLS500, 2003-2006 Mercedes-Benz E500, 2006 Mercedes-Benz S350, 2002-2006 Mercedes-Benz S430, 2002-2006 Mercedes-Benz S500, 2003-2006 Mercedes-Benz SL500, 2003-2005 Mercedes-Benz E320, 2005 Mercedes-Benz SLR McLaren, 2003-2004 Mercedes-Benz G55 AMG, 2002-2003 Mercedes-Benz CLK430, 2002 Mercedes-Benz E430, and 2002 Mercedes-Benz E55 AMG.

Common Issues This Alternator Addresses

  • Low battery charging output
  • Battery warning light illumination
  • Dim lights or unstable electrical performance
  • Charging system failure from a worn alternator
  • Noise or belt-drive issues related to alternator wear

Installation Notes and Tips

Verify pulley groove count, rotation direction, regulator type, and connector orientation before installation. Confirm vehicle fitment by year, make, and model, especially on Mercedes-Benz G500, E500, and S500 applications where charging system configurations can vary. Inspect the belt, tensioner, and electrical connections during replacement to help ensure proper charging system operation.

Quality Assurance

This Bosch alternator is a new replacement part built to Bosch Premium Alternator standards and tested for performance and reliability before release.

Related reading

This part fits 42 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelBody TypeDrive TypeLitersCylindersPositionNotes
2008Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2007Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzCL500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzCLS500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzE500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzS350——3.7LV6N/AAlternator (New)
2006Mercedes-BenzS430——4.3LV8N/AAlternator (New)
2006Mercedes-BenzS500——5.0LV8N/AAlternator (New)
2006Mercedes-BenzSL500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzCL500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzE320——3.2LV6N/AAlternator (New)
2005Mercedes-BenzE500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzS430——4.3LV8N/AAlternator (New)
2005Mercedes-BenzS500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzSL500——5.0LV8N/AAlternator (New)
2005Mercedes-BenzSLR McLaren——5.5LV8N/AAlternator (New)
2004Mercedes-BenzCL500——5.0LV8N/AAlternator (New)
2004Mercedes-BenzE320——3.2LV6N/AAlternator (New)
2004Mercedes-BenzE500——5.0LV8N/AAlternator (New)
2004Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2004Mercedes-BenzG55 AMG——5.5LV8N/AAlternator (New)
2004Mercedes-BenzS430——4.3LV8N/AAlternator (New)
2004Mercedes-BenzS500——5.0LV8N/AAlternator (New)
2004Mercedes-BenzSL500——5.0LV8N/AAlternator (New)
2003Mercedes-BenzCL500——5.0LV8N/AAlternator (New)
2003Mercedes-BenzCLK430——4.3LV8N/AAlternator (New)
2003Mercedes-BenzE320Sedan—3.2LV6N/AAlternator (New)
2003Mercedes-BenzE500——5.0LV8N/AAlternator (New)
2003Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2003Mercedes-BenzG55 AMG——5.5LV8N/AAlternator (New)
2003Mercedes-BenzS430——4.3LV8N/AAlternator (New)
2003Mercedes-BenzS500——5.0LV8N/AAlternator (New)
2003Mercedes-BenzSL500——5.0LV8N/AAlternator (New)
2002Mercedes-BenzCL500——5.0LV8N/AAlternator (New)
2002Mercedes-BenzCLK430——4.3LV8N/AAlternator (New)
2002Mercedes-BenzE430—RWD4.3LV8N/AAlternator (New)
2002Mercedes-BenzE55 AMG——5.5LV8N/AAlternator (New)
2002Mercedes-BenzG500——5.0LV8N/AAlternator (New)
2002Mercedes-BenzS430——4.3LV8N/AAlternator (New)
2002Mercedes-BenzS500——5.0LV8N/AAlternator (New)
Directly replaces or cross-references 4 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
0121541302013154820201315486024631500150