A-Premium Serpentine Belt 6-Rib 86.64 in — EPDM K-Section, OEM Fit & Oil-Resistant

The A-Premium 6-rib serpentine belt (86.64 in) is a heavy-duty EPDM replacement belt engineered to restore accessory drive performance and reduce noise and wear.

This 6-rib serpentine belt from A-Premium is designed for direct-fit replacement on a wide range of vehicles that use an 86.64-inch effective length and K cross-section. Made from EPDM rubber with polyester cords, it matches OEM dimensions for consistent tension, smooth accessory operation, and improved resistance to cracking, oils, and environmental contaminants. Before you install, confirm fitment with your vehicle details to ensure compatibility.

Which vehicles does this 86.64-inch belt fit?

The belt fits many models from Dodge, Ford, Jeep, Mazda, Mercury, and Mitsubishi that specify a 6-rib K-section belt with an effective length of 86.64 inches. Fitment varies by engine and year, so always verify your application using the vehicle lookup before purchasing.

• Dodge: Nitro 2007–2011 V6 4.0L
• Ford: Explorer (2000–2001, 2004–2005), Explorer Sport (2001–2003), Sport Trac (2002–2005), Ranger (2001–2011) — V6 4.0L
• Jeep: Commander 2006 (3.7L/4.7L), Grand Cherokee 2004–2006 (3.7L/4.7L)
• Mazda: B4000 2001–2002, 2004–2010 (V6 4.0L)
• Mercury: Mountaineer 2000–2001 V6 4.0L
• Mitsubishi: Lancer, Outlander, Outlander Sport, RVR models with 2.0L and 2.4L engines (years vary)

How does this belt resist wear and contamination?

Constructed from premium EPDM compound, the belt resists common causes of premature failure such as ozone cracking, oil exposure, and heat aging. Polyester cords provide dimensional stability so the belt maintains correct tension and alignment under load, reducing accessory slip and vibration.

• EPDM rubber for improved crack and heat resistance
• Polyester cord core for stable length and tension
• Precision cross-section (K) to match OEM pulley geometry
• Resists oils and typical engine contaminants

What are the key specifications and reference numbers?

This belt’s effective length is 86.64 inches with an outside circumference near 87.37 inches, a top width of 0.807 inches, and six longitudinal ribs. It carries a wide set of cross-reference numbers to help you confirm compatibility across OEM and aftermarket catalogs.

• Effective length: 86.64 in; Outside circumference: 87.370 in
• Rib count: 6; Top width: 0.807 in; Cross-section: K
• Materials: EPDM rubber body, polyester cord
• Reference numbers include K060866, 1340A150, 53013864AA, 9091602437, and more

What should I check before and during installation?

For long-term performance, inspect the belt tensioner, idler pulleys, and accessory bearings before installing the new belt. Proper tension and pulley alignment are essential to prevent premature wear and noise; replace any worn or seized components at the same time.

• Verify vehicle-specific fitment using VIN or year/model lookup
• Inspect and, if needed, replace the tensioner and idler pulleys
• Align pulleys and set correct tension per manufacturer specs
• Run engine briefly and recheck tension after initial break-in

Who is this for? If you drive a vehicle listed above or any model requiring a 6-rib, 86.64-inch K-section belt and you want an OEM-dimension replacement built from modern EPDM materials, this A-Premium belt is a practical choice. It suits DIY mechanics, independent repair shops, and fleet maintenance teams needing a durable serpentine belt that resists environmental degradation while restoring smooth accessory operation. Remember to confirm fitment specifics for your exact engine and year before ordering.