Genuine 1129900012 Drive Belt Idler Pulley Bolt Pulleys

The Genuine 1129900012 is an OEM-quality bolt designed specifically for securing the drive belt idler pulley assembly. This precision-engineered fastener ensures proper tension and alignment of the serpentine belt system, which is critical for reliable operation of engine accessories including the alternator, power steering pump, air conditioning compressor, and water pump.

Key Features:

• OEM specification bolt for drive belt idler pulley mounting
• Manufactured to exact factory tolerances for proper fit and torque
• Heat-treated steel construction for durability and resistance to loosening
• Ensures correct pulley alignment and belt tension
• Direct replacement for worn or damaged original hardware

This bolt is a critical component of the accessory drive system. Using the correct OEM fastener helps prevent pulley wobble, premature belt wear, and potential drive belt failure. Always replace according to manufacturer torque specifications and service intervals.