Hayden 5044 Accessory Drive Belt Idler Pulley

Hayden 5044 Accessory Drive Belt Idler Pulley

The Hayden 5044 is a black plastic accessory drive belt idler pulley built for serpentine belt systems. It is a smooth back idler pulley with a 3.125-inch outside diameter and a 1.000-inch belt width, made to meet or exceed OEM requirements.

Use this Hayden pulley when servicing BMW accessory drive systems that need a direct-fit idler or tensioner pulley replacement. The Hayden Pulley line focuses on OE-style replacement components for belt drive service, and part number 5044 is listed across multiple BMW applications.

Key Features

• Accessory drive belt idler pulley for serpentine belt systems
• Black plastic construction
• Smooth groove design for back idler use
• 3.125 in. outside diameter and 1.000 in. belt width
• Single mounting hole design
• Meets or exceeds OEM specifications
• Cross-references Continental 49062 and Dayco 89089

Detailed Description

Hayden 5044 is an idler / tensioner pulley designed for accessory drive belt service on BMW vehicles. With a 10.1 mm inside diameter, 79.375 mm outside diameter, and 10 mm pulley width, it is sized for common serpentine belt routing needs in BMW M3, M5, M6, Z4, 325i, 330i, 525i, 530i, X3, X5, and related applications. This part number 5044 is also used in fitments that call for alternator, water pump, and power steering belt routing, including BMW models with hydraulic tensioner setups.

Compatible With BMW M3, BMW M5, BMW M6, BMW Z4, BMW 325i, BMW 330i, BMW 525i, BMW 530i, BMW X3, and BMW X5 applications listed in the fitment data. This part cross-references Continental 49062 and Dayco 89089 for the same application.

Common Problems This Part Can Address

• Noise from a worn or rough idler pulley bearing
• Belt tracking issues caused by pulley wear
• Serpentine belt vibration from a damaged pulley surface
• Accessory drive belt routing problems on BMW belt systems
• Service replacement for a cracked or deteriorated pulley body

Installation Notes and Tips

• Verify pulley diameter, width, and bore before installation.
• Inspect the serpentine belt, tensioner, and adjacent pulleys during service.
• Mounting hardware is not included.
• Confirm the vehicle’s belt routing and position notes, especially on BMW models with alternator, water pump, and power steering configurations.

Quality Assurance

Hayden lists this pulley as meeting or exceeding OEM requirements. The Hayden Pulley line is used for OE-style belt drive replacement parts, and 5044 is cataloged for multiple BMW fitments from 1990 through 2010.