HomeBelts and Cooling > Accessory Drive Belt System ComponentsGates 90K-38404A Serpentine Belt Drive Component Kit - Alternator and Water Pump
Part #: 90K-38404A

Gates 90K-38404A Serpentine Belt Drive Component Kit - Alternator and Water Pump

Accessory Belt Drive Kit, Alternator and Water Pump
⚙️ 5 vehicles fit this part
🔍
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$264.51Free 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
📦Accessory Belt Drive Kit, Alternator and Water Pump
🚗Fitment: Mini, Cooper
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST

Overview of Gates Accessory Belt Drive Kit 90K-38404A

The Gates Accessory Belt Drive Kit 90K-38404A is designed specifically for Mini Cooper models, providing a complete serpentine belt drive component solution. This kit includes a belt, tensioner, and idler pulley engineered to meet the precise specifications required for optimal accessory drive system performance.

  • Complete serpentine belt drive component kit for Mini Cooper
  • Includes belt (part number K060539), tensioner assembly (part number 38404), and idler pulley (part number 36168)
  • Belt outside circumference: 1385 mm (54.521 inches)
  • Belt top width: 20 mm (0.807 inches)
  • Designed for reliable accessory drive system operation

Detailed Product Description

The Gates Accessory Belt Drive Kit 90K-38404A is engineered to provide a precise fit and reliable function for Mini Cooper vehicles. The serpentine belt included in this kit has an outside circumference of 1385 mm (54.521 inches) and a top width of 20 mm (0.807 inches), ensuring proper tension and alignment with the accessory pulleys. The kit also contains a tensioner assembly (part number 38404) and an idler pulley (part number 36168), which work together to maintain optimal belt tension and reduce wear. This comprehensive kit supports the accessory drive system by delivering consistent power transfer to components such as the alternator, power steering pump, and air conditioning compressor.

About the Gates Accessory Belt Drive Kit Product Line

The Gates Accessory Belt Drive Kit product line offers complete solutions for serpentine belt drive systems, combining belts, tensioners, and idler pulleys in one package. This approach simplifies maintenance and replacement by providing all necessary components designed to work together. The 90K-38404A kit is part of this line, tailored specifically for Mini Cooper models to ensure compatibility and performance.

Common Applications and Issues Addressed

  • Replacement of worn or cracked serpentine belts on Mini Cooper vehicles
  • Resolving belt slippage or squealing noises due to tensioner failure
  • Addressing accessory drive system misalignment caused by faulty idler pulleys
  • Preventing accessory component failure by maintaining proper belt tension
  • Improving overall engine accessory performance and reliability

Installation Notes and Tips

  • Ensure the vehicle is off and cooled before beginning installation
  • Use proper tools to relieve tension from the old belt tensioner
  • Verify the belt routing matches the vehicle’s accessory drive diagram
  • Inspect pulleys and tensioner for wear before installing new components
  • After installation, start the engine and check for proper belt alignment and tension

Quality Assurance and Warranty

Gates manufactures the Accessory Belt Drive Kit 90K-38404A to meet strict quality standards, ensuring durability and reliable performance. Each component is tested for fit and function to provide consistent operation within the accessory drive system. Warranty coverage details should be confirmed with the product documentation or authorized distributors.

BrandGates
Part Number90K-38404A
PositionAccessory Belt Drive Kit, Alternator and Water Pump
Belt 1 Outside Circumference (in)54.521
Belt 1 Outside Circumference (mm)1385
Belt 1 Part NumberK060539
Belt Top Width.807
Belt Top Width20
ContentsBelt, Tensioner, Idler
Idler Pulley 1 Part Number36168
Outside Circumference54.521
Outside Circumference1385
Tensioner Assembly Part Number38404

This part fits 5 vehicles. Search below:

YearMakeModelLitersCylindersFuel TypePositionNotes
2006MiniCooper1.6LL4GASAlternator and Water Pump{K060539, 38404, 36168}; W/John Cooper Works Kit; Accessory Belt Drive Kit
2005MiniCooper1.6LL4GASAlternator and Water Pump{K060539, 38404, 36168}; W/John Cooper Works Kit; Accessory Belt Drive Kit
2004MiniCooper1.6LL4GASAlternator and Water Pump{K060539, 38404, 36168}; W/John Cooper Works Kit; Accessory Belt Drive Kit
2003MiniCooper1.6LL4GASAlternator and Water Pump{K060539, 38404, 36168}; W/John Cooper Works Kit; Accessory Belt Drive Kit
2002MiniCooper1.6LL4GASAlternator and Water Pump{K060539, 38404, 36168}; W/John Cooper Works Kit; Accessory Belt Drive Kit

* 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:

90K-38404ADBK060539

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