Genuine 1129900112 Accessory Drive Belt Idler Pulley Bolt

Accessory Drive Belt Idler Pulley Bolt for Mercedes-Benz

This Genuine accessory drive belt idler pulley bolt is a direct-fit hardware component for Mercedes-Benz belt drive service. It is used on a wide range of V8 and AMG applications, including Mercedes-Benz E500, S500, and ML55 AMG models, where secure pulley mounting is critical to belt alignment and accessory drive operation.

• Genuine OE replacement hardware for accessory drive belt idler pulley mounting
• Fits a broad range of Mercedes-Benz applications from 1998-2009
• Part number 1129900112 for accurate ordering and service matching
• Direct-fit fastener for belt drive maintenance on select Mercedes-Benz models

Detailed Product Information

Part number 1129900112 is an accessory drive belt idler pulley bolt made for Mercedes-Benz vehicles that use this specific hardware in the front accessory drive system. It is commonly selected during belt service, pulley replacement, or front-end engine maintenance on models such as the Mercedes-Benz CL500, CLK55 AMG, and SL500. Using the correct bolt helps maintain proper pulley retention and consistent belt tracking across the accessory drive system.

This part cross-references OE-style service hardware for the same application. For buyers searching by vehicle, this bolt is a fitment match for Mercedes-Benz E320, Mercedes-Benz ML320, and Mercedes-Benz C43 AMG applications, among others listed below.

What This Part Helps Address

• Loose or missing idler pulley mounting bolt
• Accessory drive pulley service during belt replacement
• Front engine accessory drive noise caused by worn or incorrect hardware
• Improper pulley retention after maintenance
• Fitment issues when replacing belt drive components on select Mercedes-Benz models

Installation Notes and Tips

Verify the original bolt specification against the removed hardware before installation. Inspect the idler pulley, mounting surface, and surrounding belt drive components for wear, corrosion, or damage before reassembly. Confirm application by VIN when servicing Mercedes-Benz E430, CLK430, or S430 models, since accessory drive layouts can vary by engine and production date.

Quality Assurance

Genuine parts are selected for OE-style fit and application-specific service use. Part number 1129900112 is intended for confirmed Mercedes-Benz fitments listed in the catalog data.

• Fits 2005-2009 Mercedes-Benz SLK55 AMG, N/A
• Fits 2002-2008 Mercedes-Benz G500, N/A
• Fits 2002-2007 Mercedes-Benz ML500, N/A
• Fits 2006-2007 Mercedes-Benz R500, N/A
• Fits 2005-2006 Mercedes-Benz C55 AMG, N/A
• Fits 2000-2006 Mercedes-Benz CL500, N/A
• Fits 2003-2006 Mercedes-Benz CLK500, N/A
• Fits 2001-2006 Mercedes-Benz CLK55 AMG, N/A
• Fits 2006 Mercedes-Benz CLS500, N/A
• Fits 1998-2006 Mercedes-Benz E320, N/A
• Fits 2003-2006 Mercedes-Benz E500, N/A
• Fits 2006 Mercedes-Benz S350, N/A
• Fits 2000-2006 Mercedes-Benz S430, N/A
• Fits 2000-2006 Mercedes-Benz S500, N/A
• Fits 2001-2006 Mercedes-Benz S55 AMG, N/A
• Fits 1999-2006 Mercedes-Benz SL500, N/A
• Fits 2001-2005 Mercedes-Benz C240, N/A
• Fits 2001-2005 Mercedes-Benz C320, N/A
• Fits 1998-2005 Mercedes-Benz CLK320, N/A
• Fits 2003-2005 Mercedes-Benz ML350, N/A
• Fits 2003-2004 Mercedes-Benz G55 AMG, N/A
• Fits 2001-2004 Mercedes-Benz SLK320, N/A
• Fits 1999-2003 Mercedes-Benz CLK430, N/A
• Fits 1998-2003 Mercedes-Benz ML320, N/A
• Fits 2000-2003 Mercedes-Benz ML55 AMG, N/A
• Fits 2001-2002 Mercedes-Benz CL55 AMG, N/A
• Fits 1998-2002 Mercedes-Benz E430, N/A
• Fits 1999-2002 Mercedes-Benz E55 AMG, N/A
• Fits 1999-2001 Mercedes-Benz ML430, N/A
• Fits 1998-2000 Mercedes-Benz C280, N/A
• Fits 1998-2000 Mercedes-Benz C43 AMG, N/A