Dayco 4PK755EE Serpentine Belt - Air Conditioning

Dayco 4PK755EE Serpentine Belt for Smart Fortwo

The Dayco 4PK755EE is an EPDM serpentine belt for the accessory drive system on select Smart Fortwo models with air conditioning. It is an elastic self-tensioning belt that supersedes E040290 and is built to match the specified K-section, 4-rib application.

Fits 2008-2015 Smart Fortwo, Air Conditioning. Fits 2008-2015 Smart Fortwo, Air Conditioning with the correct accessory drive configuration for this belt profile.

Key Features

• Brand: Dayco
• Part number: 4PK755EE
• Supersedes E040290
• EPDM4 construction for accessory drive service
• 4-rib, K-section profile
• Black belt with straight rib profile
• Effective length: 29.724 in. (754.99 mm)
• Top width: 0.54 in.
• Elastic self-tensioning design
• Meets SAE J1459 standards

Product Details

This Dayco serpentine belt is specified for the air conditioning drive on 2008-2015 Smart Fortwo models. The EPDM4 material, 4-rib layout, and straight rib profile are selected for accessory drive applications that require consistent belt tracking and stable operation across a wide temperature range. The belt’s effective length of 29.724 inches and free length of 29.0 inches support the listed fitment, while the elastic self-tensioning design matches the OE-style application that supersedes E040290. If you are sourcing a replacement for a Smart Fortwo air conditioning belt, 4PK755EE is the direct part number to verify against the vehicle’s existing belt specification.

This part cross-references E040290 for the same application.

Common Issues This Belt Can Address

• Cracked or glazed accessory drive belt material
• Squealing from a worn air conditioning belt
• Loss of proper belt tracking on the accessory drive system
• Visible rib wear or fraying on the existing belt
• Replacement need after the original belt reaches service life

Installation Notes and Tips

Verify the vehicle’s year, model, and air conditioning belt configuration before ordering. Confirm the belt profile, rib count, and effective length against the removed belt or service information for the Smart Fortwo. Because this is an elastic self-tensioning belt, follow the correct installation procedure for the application to avoid damage during fitment. Inspect pulleys and accessory drive components for wear before installing the new belt.

Quality Assurance

Dayco manufactures accessory drive components to SAE J1459 standards, and this belt uses EPDM4 construction for specified operating conditions from -45°F to 212°F.