E
Emma S.Verified Buyer
12/14/2025
Exactly what I needed
Easy to order and arrived quickly. Product matched the listing and works great.
DuralastDuralast 1890 mm Accessory Drive Belt 745K4
$10.99
Delivery by Oct 18
- Free shipping over $25
- Next-business-day ship
- Easy returns
Guides & Resources
Product guides for this item are not available online yet. Contact us if you need documentation.
Shipping Information
Free shipping on orders over $25. Most items ship next business day after your order is placed.
Returns Policy
Returns are accepted when the product is in its original, unopened container. Contact us if you have questions about your order.
Product facts
About This Item
- Maximize belt life and load-carrying capacity through a specialized rubber compound that incorporates a high-temperature polymer.
- Reduce belt stretch for consistent performance with a design constructed using treated polyester cord.
- Ensure reliable operation in extreme conditions with heat and ozone resistant EPDM rubber rated for temperatures from -45 Deg. F to 265 Deg. F.
- Minimize noise from worn and misaligned pulleys using fiber added directly to the rib stock to reinforce the rubber.
- Achieve better belt-to-pulley contact with a precision-engineered multi-v belt designed to meet strict automotive drive system demands.
- Ensure a proper standard replacement fit backed by OEM requirements.
Details
Product Description
Keep your drive systems running dependably with the Duralast 74.5in Serpentine Belt 745K4, designed to provide better belt-to-pulley contact. This multi-v belt features a specialized rubber compound incorporating a high-temperature polymer to maximize load carrying requirements and belt life. Constructed with heat and ozone resistant EPDM rubber, it operates reliably in temperatures ranging from -45 Deg. F to 265 Deg. F. Treated polyester cord reduces belt stretch, while added fiber in the rib stock reinforces the rubber and reduces noise from worn and misaligned pulleys. This standard replacement belt meets OEM requirements with a 4-rib design, a 74.4-inch effective length, a 75-inch outside circumference, and a 0.54-inch top width. Includes a 12-month warranty.
Technical data
Product Specifications
- Part #
- 745K4
- SKU #
- 66366
- Minimum Operating Temperature
- -45 Deg. F
- Maximum Operating Temperature
- 265 Deg. F
- Rib Quantity
- 4
- Outside Circumference
- 75 in
- Grade Type
- Standard Replacement
- Material
- Ethylene Propylene Terpolymer (EPDM)
- Top Width
- 35/64 in
- Effective Length
- 74 13/32 in
- Belt Material
- EPDM
- Color
- Black
- Cord Material
- Polyester
- Cross Section Designation
- K
- Type
- Standard
Brand
Brand Story
Replacement parts
Parts
Duralast
Batteries, brakes, and belts in the Duralast line
Duralast is a replacement-parts brand covering batteries, brake parts, belts, and rotating electrical. District Mailing Auto carries selected Duralast items from that lineup.
Shop DuralastLineup
Under-car and under-hood
The brand covers batteries, brake parts, belts, and rotating electrical.
Application
Belts and brakes
Typical jobs include serpentine belts and disc-brake service.
Storefront
At District Mailing Auto
Shop the Duralast products currently in the catalog.
Customer Reviews
4.3
Based on 3 reviews
D
Dana H.Verified Buyer
10/02/2025
Solid purchase
Quality feels premium and it fits my needs well.
A
Alex P.Verified Buyer
01/09/2025
Fast shipping too
Impressed with the quality for the price. Will be back for more.