Dorman 419-521 Engine Idler Pulley 14-16 Ford F-150 BL3Z8678D
Confirm Fitment Before You Buy
Not sure it fits? Message Year/Make/Model/Engine (2WD/4WD if applicable) and we’ll help confirm compatibility.
Why buy from Koskowski Automotive?
• 50+ years (since 1972) • Dorman Authorized Seller • Fast shipping • Easy returns
Regular price
$78.06
Select your vehicle at the top of the page to check fitment.
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Vehicle Fitment: Use the table below to match your exact configuration. If you don’t see your exact setup, message us before ordering.
This replacement accessory drive belt idler pulley has been engineered to match the function and performance of the original pulley on select vehicle years, makes and models, properly restoring critical vehicle operations.
- Direct replacement - this accessory drive belt idler pulley matches the fit and function of the original equipment pulley on specified vehicles
- Restores performance - fixes a failed, squealing or groaning noise from a worn idler pulley
- Application specific - reverse engineered from the original design on certain vehicle years, makes and models
- Trustworthy quality - backed by team of engineers and quality specialists in the United States
Vehicle Fitment
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2014-2016 | Ford | F-150 | Aluminum Pulley; 5.0L V8 | |
| 2015-2016 | Ford | Lobo | Aluminum Pulley; 5.0L V8 | |
| 2014 | Ford | Lobo | Aluminum Pulley |
Please confirm the part number and your vehicle's year, make, model and engine before ordering. Questions? Message us with your VIN and we'll check fitment for you.
Specifications
| Brand | Dorman |
|---|---|
| Part Number | 419-521 |
| UPC | 194883125766 |
| Material | Aluminum |
| Color | Black |
| Inside Diameter | 15 mm |
| Width | 17.5 mm |
| Outside Diameter | 80 mm |
| Groove Quantity | 5 |
| Belt Type | V-Belt; Serpentine |
| Mounting Hole Quantity | 1 |
| Bolt Diameter | 0.125 in. |
| Mounting Hole Diameter | 15 mm |
| Bolt Head Type | Round-Head |
| Grade Type | Standard Replacement |
| Material Thickness | 2.7 mm |
| Mounting Hardware Included | No |
| Package Contents | 1 Accessory Drive Belt Idler Pulley; 1 Screw; 1 Washer; 1 Instruction Manual |
| Pulley Bearing Quantity | 1 |
| Pulley Bearing Width (mm) | 40 mm |
| Pulley Diameter (mm) | 90 mm |
| Pulley Width (mm) | 23 mm |
| Universal Or Specific Fit | Specific |
| Country of Origin | China |
| Warranty | Limited Lifetime |
OE & Interchange Numbers
| BL3Z8678D | Ford (OE) |
|---|---|
| BL3E19A216BA | Ford (OE) |
| W707288S437 | Ford (OE) |
| BL3E19A216DA | Ford (OE) |
| BL3Z8678B | Ford (OE) |
| 50130 | Interchange |
| 900708A | Interchange |
| 89847 | Interchange |
| 36817 | Interchange |
| YS368 | Interchange |