Serpentine Belt Tensioner Kit 90K39221 Fit for 2011-2017 Ford F-150 Mustang Lincoln Navigator 3.5L 3.7L
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| Year | Make | Model | Engine |
|---|---|---|---|
| 2013 | Ford | F-150 | 3.5L Turbocharged GAS |
| 2015 | Ford | F-150 | 3.5L Turbocharged GAS |
| 2015-2017 | Ford | F-150 | 3.5L N/A FLEX |
| 2017 | Ford | F-150 | 3.5L N/A GAS |
| 2011-2013 | Ford | F-150 | 3.7L N/A FLEX / GAS |
| 2014 | Ford | F-150 | 3.7L N/A |
| 2015-2017 | Lincoln | Navigator | 3.5L Turbocharged GAS |
| 2015-2017 | Ford | Mustang | 3.7L N/A GAS |
This Serpentine Belt Kit with Tensioner is designed to replace worn or damaged belt drive system components and help maintain proper engine accessory operation. It is compatible with select Ford F-150, Ford Mustang, and Lincoln Navigator vehicles equipped with 3.5L and 3.7L engines. This kit includes belts and belt tensioner components to help maintain proper belt tension, reduce vibration, and support reliable engine performance.
Product Features
Complete Belt Drive Replacement Kit
Includes two belts and one belt tensioner to provide essential components for restoring proper belt drive system operation.
Maintains Proper Belt Tension
The tensioner pulley helps dampen belt vibrations and maintain optimal belt tension for smoother and more stable belt system operation.
Durable Construction
Made with high-grade rubber and premium tensile materials, providing resistance to heat and corrosion for extended service life.
OE Reference Number Compatibility
Designed to replace OE reference numbers and provide a reliable replacement solution for specified Ford and Lincoln applications.
Stable Engine Accessory Performance
Helps maintain proper belt operation and supports reliable engine accessory performance during daily driving conditions.
OE / Reference Numbers
Replacement Part Numbers
90K39221
39221
Package Includes
Included Components
2 × Belt (OE# 90K39221)
1 × Belt Tensioner (OE# 39221)

Important Notes
Fitment Verification
Please verify your vehicle year, make, model, engine specifications, and OE/reference number before purchasing to ensure compatibility.
Installation Recommendation
Professional installation is recommended for proper belt tension adjustment and system operation.
Warranty
AUCERAMIC 12-Month Warranty
AUCERAMIC provides a 12-month warranty for this Serpentine Belt Kit with Tensioner. If you experience any product quality issues during the warranty period, please contact our customer service team for assistance.
⏱ Estimated Delivery Time
Delivery times vary by location:
- USA: 3-7 business days
- Canada & Europe: 7-18 business days
- Australia & New Zealand: 10-20 business days
- Other regions: 15-45 business days
Delivery times may vary due to carrier delays, customs clearance, or local delivery conditions.
🚚 Shipping Information
Processing Time:
Orders are usually processed within 1-2 business days after payment confirmation.
Shipping Method:
- USA orders: For eligible US orders, products are fulfilled from our US warehouse network and shipped via USPS, UPS, or FedEx.
- International orders: Shipped via reliable international carriers
Tracking:
A tracking number will be emailed after shipment. You can track your order through carriers such as USPS, UPS, FedEx, DHL, or 17TRACK.
📦 Order Issues
If your package arrives damaged, incorrect, missing items, or significantly delayed:
Please contact us with:
- Order number
- Photos/videos of the package and product
- Description of the issue
Our team will review and provide a solution as quickly as possible.
🔄 Returns & Warranty
We accept returns within 30 days after delivery.
To be eligible for a return:
- Item must be unused, uninstalled, and in original condition
- Must include original packaging and all accessories
⚠️ Installed, used, or tested parts are not eligible for return unless there is a confirmed manufacturing defect.
For return requests, please contact us first with your order number, product details, and photos (if applicable).
Warranty Coverage:
✔ Manufacturing defects
✔ Shipping damage
Not covered:
✘ Improper installation
✘ Misuse or modification
✘ Incorrect vehicle application
💬 Fitment Support
Not sure if this part fits your vehicle?
Send us your year, make, model, engine size, and VIN (if available). Our team will help confirm compatibility before purchase.