Four Seasons 45046 Accessory Drive Belt Idler Assembly

Accessory Drive Belt Idler Assembly for BMW

Four Seasons 45046 is an accessory drive belt idler assembly built for serpentine belt routing on select BMW 750iL applications. It uses a smooth groove, black plastic pulley design, and OE-style mounting dimensions to match the accessory drive belt system on the listed vehicles.

The Four Seasons Idler Assembly line focuses on direct-fit belt system components for accessory drive applications. Part number 45046 is specified for BMW 750iL models with alternator and power steering drive belt configurations, including auto tensioner setups where listed.

Key Features

• Accessory drive belt idler assembly for serpentine belt systems
• Smooth pulley groove for belt routing in idler applications
• Black plastic construction
• Mounting hole quantity: 2
• Outside diameter: 2.76 in. / 70.0 mm
• Pulley width: 1.11 in. / 28 mm
• Belt width: 1.125 in. / 28.575 mm
• Four Seasons part number 45046

Detailed Description

Four Seasons 45046 is an idler assembly for the accessory drive belt system, engineered around the dimensions and pulley style used in serpentine belt routing. The smooth pulley surface, 0.31 in. inside diameter, and 0.32 in. mounting hole diameter support proper alignment in the belt path, while the 4.1 in. overall length and 2.76 in. outside diameter reflect the listed OE-style sizing. This part cross-references Gates 38062 for the same application.

Compatible With BMW 750iL applications from 1994-2000 for alternator, power steering, grooved pulley, and smooth pulley positions, and 2001 BMW 750iL applications where listed for alternator and auto tensioner belt drive configurations. If you are replacing a worn BMW 750iL idler pulley or servicing a serpentine belt system, Four Seasons 45046 provides the specified fitment reference for these accessory drive layouts.

Common Issues This Part Addresses

• Noise from a worn or rough idler pulley
• Belt tracking problems in the accessory drive system
• Serpentine belt wear caused by pulley surface damage
• Improper belt routing at the idler location
• Service replacement for BMW 750iL accessory drive belt components

Installation Notes and Tips

Verify the pulley style, mounting hole spacing, and belt width before installation. Match the application to the listed BMW 750iL year, position, and belt-drive configuration, especially on vehicles with auto tensioner or alternator and power steering drive belt layouts. Inspect the serpentine belt and adjacent tensioner components during service to confirm the belt path is clean and aligned.

Quality Assurance

Four Seasons supplies accessory drive belt system components for OE-style replacement needs. Part number 45046 is cataloged with defined dimensions, material, and fitment references to support accurate selection for the listed BMW 750iL applications.