Dayco 4PK834EE Serpentine Belt - Air Conditioning or Main Drive

Dayco 4PK834EE Serpentine Belt Overview

The Dayco 4PK834EE is an elastic self-tensioning serpentine belt for accessory drive applications. Built from EPDM4 material with a 4-rib K-section profile, it measures 32.835 inches in effective length and is finished in black for a direct-fit replacement on listed Ford and BMW applications.

Dayco’s Supersedes E040320 line identifies this belt as the updated replacement for the earlier part number, making 4PK834EE a practical choice when servicing the accessory drive belt system on select Mustang and BMW models.

Key Features

• EPDM4 construction for durable accessory drive performance
• 4-rib K-section design with straight rib profile
• Elastic self-tensioning belt style for listed applications
• Effective length: 32.835 in. (834.01 mm)
• Top width: 0.54 in.
• Black finish
• Built to SAE J1459 standards
• Operating temperature range: -45°F to 212°F

Detailed Product Description

Dayco 4PK834EE is a serpentine belt engineered for accessory drive system service where an elastic self-tensioning belt is specified. Its EPDM4 rubber construction is paired with a 4-rib K-section layout to maintain proper belt tracking across the pulley system. With a free length of 32.0 inches and an effective length of 32.835 inches, this belt matches the dimensions required for the listed Ford Mustang and BMW air conditioning and main drive applications. This part number, 4PK834EE, supersedes E040320.

Compatible With 2022-2023 Ford Mustang, air conditioning; 2015-2021 Ford Mustang, main drive; and select BMW 335d, 545i, 550i, 645Ci, 650i, 745i, 745Li, 750i, and 750Li air conditioning applications. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Issues This Belt Can Address

• Cracked or glazed accessory drive belt material
• Squealing from a worn serpentine belt
• Loss of proper belt tension in elastic belt applications
• Accessory drive noise from belt wear or age
• Service replacement for a superseded belt number

Installation Notes and Tips

Verify pulley alignment, belt routing, and the required elastic self-tensioning design before installation. Confirm the application by year, make, model, and position: Fits 2022-2023 Ford Mustang, Air Conditioning; Fits 2015-2021 Ford Mustang, Main Drive; Fits 2009-2011 BMW 335d, Air Conditioning; Fits 2006-2010 BMW 550i, Air Conditioning; Fits 2006-2010 BMW 650i, Air Conditioning; Fits 2006-2008 BMW 750i, Air Conditioning; Fits 2006-2008 BMW 750Li, Air Conditioning; Fits 2004-2005 BMW 545i, Air Conditioning; Fits 2004-2005 BMW 645Ci, Air Conditioning; Fits 2004-2005 BMW 745i, Air Conditioning; Fits 2005 BMW 745Li, Air Conditioning.

Quality Assurance

This Dayco belt is manufactured to SAE J1459 standards and uses EPDM4 material for consistent accessory drive service in the specified temperature range. The updated Supersedes E040320 reference helps confirm the correct replacement part number for the listed vehicles.