Genuine Ford HL3Z-9J478-A Heater Hose Assembly
Product Overview
The Genuine Ford HL3Z-9J478-A is an OEM Heater Hose Assembly, a critical component in your vehicle's climate control and engine cooling system. This precision-engineered assembly is responsible for circulating hot engine coolant from the engine to the heater core, providing cabin heat and defrost functionality while contributing to overall engine temperature regulation. Designed with integrated quick-connect fittings, this hose assembly ensures a secure, leak-free connection that simplifies installation and enhances reliability.
Failure of this component can result in coolant leaks, loss of cabin heat, engine overheating, and potential interior damage from leaking coolant. This genuine Ford replacement restores system integrity and performance.
Key Features & Benefits
Genuine Ford OEM Quality: Manufactured to Ford's exact specifications, ensuring perfect fit, material compatibility, and long-term reliability.
Integrated Quick-Connect Fittings: Features factory-style quick-disconnect couplers that provide a secure, tool-friendly connection and eliminate the need for traditional hose clamps.
Precision Molded Construction: Formed from high-quality EPDM rubber with specific bends and lengths to match the original routing, preventing kinks and ensuring optimal coolant flow.
Complete Assembly: Includes all necessary fittings and connection points for a straightforward, hassle-free installation.
Restores Climate Control: Directly addresses failures that cause inadequate cabin heating and defrosting performance.
Technical Specifications
| Specification Category | Details |
| Part Name | Heater Hose Assembly |
| Manufacturer | Genuine Ford |
| Part Number | HL3Z-9J478-A |
| Condition | New |
| Connection Type | Quick-Connect Fittings |
| Material | EPDM Rubber with Molded Ends |
Vehicle Fitment & Compatibility
This heater hose assembly is designed for specific Ford vehicles equipped with EcoBoost engines.
Primary Compatible Applications:
| Model | Model Years | Engine | Notes |
| Ford F-150 | 2015-2020 | 2.7L EcoBoost V6 | With specific cooling system configuration |
| Ford F-150 | 2015-2020 | 3.5L EcoBoost V6 | With specific cooling system configuration |
| Ford Expedition | 2015-2017 | 3.5L EcoBoost V6 | |
| Ford Expedition | 2018-2020 | 3.5L EcoBoost V6 |
Critical Fitment Note: Cooling system components are highly specific to engine and production date. Always verify fitment using your vehicle's 17-character VIN number before purchase.
Installation Notes & Symptoms of Failure
Common Symptoms of a Failing Heater Hose Assembly:
Loss of Cabin Heat: Blower works but only cool air from vents
Visible Coolant Leaks: Puddles under front passenger side or steam from engine bay
Low Coolant Warning: Frequent need to top up reservoir
Sweet Smell in Cabin or Engine Bay: Indicates coolant leak
Engine Overheating: Due to coolant loss from leak
Installation Advisory:
Allow engine to cool completely before servicing
Use appropriate tools for quick-connect fittings to avoid damage
Replace coolant with factory-specified type and properly bleed system
Professional installation recommended to ensure correct bleeding and leak-free operation
Frequently Asked Questions (FAQ)
Q: Does this part include both inlet and outlet hoses?
A: This is a specific hose assembly. Some applications may require a separate return hose. Verify with your VIN for complete system requirements.
Q: Why choose genuine Ford over aftermarket?
A: Genuine Ford hoses are molded to exact specifications with factory-style connectors that aftermarket parts may not replicate perfectly, ensuring proper fit and leak-free operation.
Q: Are you a factory or a trading company?
A: We are a manufacturing factory (NINGBO JIATIAN AUTOMOBILE PIPE CO., LTD.) with IATF 16949 certification. This means we produce the parts ourselves, ensuring quality control and competitive pricing.
Q: Do you offer samples for quality verification?
A: Yes, we encourage potential partners to test our product quality. Samples are available for a modest cost. Contact us to arrange a sample order.
Q: What is your Minimum Order Quantity (MOQ)?
A: We offer flexible MOQs to support new business. For this standard OE part, the MOQ can be as low as 50 pieces. Custom parts may have different requirements.
Q: What is your typical lead time for production and shipment?
A: For this specific part, we can often ship sample or small orders within 7-10 days. For larger production runs, the standard lead time is 30-35 days after order confirmation and deposit receipt.
Q: Can I replace just the leaking section?
A: No. This is a complete assembly designed for full replacement. Partial repairs using universal hose are not recommended for this application.
Call to Actio
Restore your Ford's heating system with a genuine OEM hose assembly.
Contact us today for competitive pricing, availability, and VIN-based fitment verification for part HL3Z-9J478-A.
