Hayden 5985 Accessory Drive Belt Idler Pulley - Alternator (Right) or Right

Overview of Hayden Pulley Accessory Drive Belt Idler Pulley 5985

The Hayden Pulley 5985 is a precision-engineered accessory drive belt idler pulley designed for select BMW models. Engineered with durable plastic and a smooth groove design, this pulley supports serpentine belt systems in vehicles such as the BMW 530i, 740i, 740iL, and 840Ci.

• Material: High-quality plastic construction
• Color: Black finish for corrosion resistance
• Inside Diameter: 0.375 inches (9.525 mm)
• Outside Diameter: 3.1875 inches (80.963 mm)
• Width: 1.125 inches (28.6 mm)
• Groove Quantity: Smooth surface for serpentine belts
• Compatible Belt Type: Serpentine
• Mount Hole Quantity: Single mounting hole
• Meets or exceeds OEM specifications
• Mounting hardware not included

Hayden Pulley Product Line Details

The Hayden Pulley product line focuses on delivering reliable pulley components for accessory drive belt systems. This line includes idler and tensioner pulleys designed to maintain proper belt tension and alignment. The Pulley 5985 model is a back idler type, engineered to meet the specific demands of BMW serpentine belt configurations, ensuring consistent performance and durability.

Detailed Product Description

The Hayden Pulley 5985 is an idler/tensioner pulley constructed from durable plastic, featuring a smooth surface groove optimized for serpentine belt applications. With an outside diameter of 3.1875 inches and a width of 1.125 inches, it is designed to fit the accessory drive belt system of BMW 530i, 740i, 740iL, and 840Ci models. The pulley’s inside diameter measures 0.375 inches, accommodating a single mounting hole for secure installation. Its black color finish helps resist corrosion and wear, contributing to long service life. This pulley meets or exceeds OEM standards, providing a reliable replacement part for maintaining proper belt tension and alignment in your BMW’s engine system.

Common Applications and Issues Addressed

• Restores proper serpentine belt tension and alignment
• Eliminates belt slippage and squealing noises
• Prevents premature belt wear and damage
• Replaces worn or damaged idler pulleys in BMW 530i, 740i, 740iL, and 840Ci
• Supports smooth operation of accessory drive components

Installation Notes and Tips

Installation of the Hayden Pulley 5985 requires removal of the old idler pulley and securing the new pulley using the existing mounting hardware, which is not included with this part. Ensure the serpentine belt is properly routed and tensioned according to BMW specifications. It is recommended to inspect the belt and other drive components during installation to confirm overall system integrity.

Quality Assurance and Warranty

This Hayden Pulley 5985 meets or exceeds OEM quality standards for fit, form, and function. Manufactured with precision materials and tested for durability, it provides dependable performance for BMW accessory drive belt systems. Warranty information should be confirmed with the distributor or manufacturer, as it may vary.