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The Genuine Subaru OEM Heater Hose – Outlet (Part #72421AL01B) is the factory-replacement coolant outlet hose designed specifically for the 2015–2019 Subaru Legacy with the 3.6L H6 (36D) engine. As an OEM part, it delivers an exact fit, OEM-grade materials, and the durability expected from Subaru's factory engineering — ensuring your cabin heating system operates safely and efficiently.
| Part Number | 72421AL01B |
|---|---|
| Part Type | Heater Hose – Outlet |
| OEM / Aftermarket | Genuine Subaru OEM |
| Engine Application | 3.6L H6 (36D) |
| Material | OEM-spec heat and coolant-resistant rubber |
| Condition | New |
This heater hose outlet is compatible with the following Subaru vehicles equipped with the 3.6L H6 (36D) engine:
| Year | Model | Engine |
|---|---|---|
| 2015 | Legacy | 3.6L H6 (36D) |
| 2016 | Legacy | 3.6L H6 (36D) |
| 2017 | Legacy | 3.6L H6 (36D) |
| 2018 | Legacy | 3.6L H6 (36D) |
| 2019 | Legacy | 3.6L H6 (36D) |
Always verify your vehicle's VIN and engine code before ordering to confirm compatibility.
This heater hose outlet is a direct OEM replacement and installs in the factory location with no cutting or modification. Basic cooling system service experience is recommended — drain coolant before removal, replace hose clamps as needed, and refill/bleed the cooling system after installation. Professional installation is advised if you are unfamiliar with coolant system service.
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