HomeBelts and Cooling > Accessory Drive Belt System ComponentsGates K040399 Serpentine Belt - Air Conditioning
Part #: K040399

Gates K040399 Serpentine Belt - Air Conditioning

Premium OE Micro-V Belt, Air Conditioning
⚙️ 5 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$30.92Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
📦Premium OE Micro-V Belt, Air Conditioning
🚗Fitment: INFINITI, Q45
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Premium OE Micro-V Belt K040399

The Gates Premium OE Micro-V Belt K040399 is engineered for reliable performance in automotive accessory drive systems. Designed specifically for the INFINITI Q45, this serpentine belt ensures consistent power transmission to essential engine components.

  • Top width options: 0.56 inches and 14 mm
  • Effective length: 1017 mm (40.02 inches)
  • Outside circumference: 1031 mm (40.625 inches)
  • Constructed with durable EPDM belt material and polyester cord
  • 4-rib automotive v-ribbed belt (standard) design
  • Cross section designation: K
  • OE performance rating for reliable fit and function

Detailed Product Description

This serpentine belt from Gates features a robust EPDM (ethylene propylene diene monomer) belt material combined with polyester cords, providing excellent resistance to heat, wear, and environmental factors. The 4-rib design and K cross section ensure optimal grip and flexibility, maintaining proper tension and alignment in the accessory drive system. With an effective length of 1017 mm and an outside circumference of 1031 mm, this belt is tailored to meet the exact specifications required for the INFINITI Q45.

The Premium OE Micro-V Belt line by Gates is designed to meet or exceed original equipment standards, offering OE performance and fitment. This product line focuses on delivering consistent quality and durability, making it suitable for replacement in vehicles requiring precise belt dimensions and materials.

Compatible Vehicles and Applications

  • Compatible with INFINITI Q45 models requiring a serpentine belt with part number K040399
  • Used in accessory drive belt systems to power alternators, water pumps, power steering pumps, and air conditioning compressors
  • Ideal for addressing issues such as belt wear, cracking, slipping, or noise in the accessory drive system

Installation Notes and Tips

  • Ensure proper belt routing according to the vehicle’s service manual
  • Check pulleys and tensioners for wear before installation
  • Use a belt tension gauge to verify correct tension after installation
  • Inspect the belt periodically for signs of wear or damage

Quality Assurance and Warranty

The Gates Premium OE Micro-V Belt K040399 is manufactured to meet stringent quality standards, ensuring reliable performance and durability. This belt carries an OE comparison rating, confirming its suitability as a direct replacement part. Warranty coverage details should be confirmed with the product documentation or supplier.

BrandGates
Part NumberK040399
PositionPremium OE Micro-V Belt, Air Conditioning
Belt MaterialEPDM
Cord MaterialPolyester
Cord MaterialPolyester
Cross Section DesignationK
Effective Length40.02
Effective Length1017
OE Comparison RatingOE Performance
Outside Circumference40.625
Outside Circumference1031
Rib Quantity4
SectionK
Top Width.56
Top Width14
TypeAutomotive V-Ribbed Belt (Standard)
TypeAutomotive V-Ribbed Belt (Standard)
Washer Pump IncludedEPDM

This part fits 5 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2001INFINITIQ454.1LV8GASAir ConditioningPremium OE Micro-V Belt
2000INFINITIQ454.1LV8GASAir ConditioningPremium OE Micro-V Belt
1999INFINITIQ454.1LV8GASAir ConditioningPremium OE Micro-V Belt
1998INFINITIQ454.1LV8GASAir ConditioningPremium OE Micro-V Belt
1997INFINITIQ454.1LV8GASAir ConditioningPremium OE Micro-V Belt

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

119206P00225-04039940404004K3994PK1015K040399

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.