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The Genuine Subaru OEM Transmission Cooler Hose (Part #45520AG03A) is the factory-original replacement hose designed to maintain proper automatic transmission fluid cooling on 2005–2007 and 2009 Subaru Legacy and Outback models. Engineered to Subaru’s exact specifications, this OEM hose ensures a precise fit and reliable seal — protecting your transmission from overheating and extending its service life. If you’re experiencing a transmission fluid leak or replacing worn cooling lines, this is the correct, guaranteed-fit part straight from Subaru.
| Subaru Part Number | 45520AG03A |
|---|---|
| Part Type | Transmission Cooler Hose |
| Condition | New — Genuine OEM |
| Material | OEM-spec rubber/reinforced hose construction |
| Application | Automatic Transmission Cooling System |
| Compatible Fluid | Automatic Transmission Fluid (ATF) |
2005-2007 Subaru Legacy
2009 Subaru Legacy
2005-2007 Subaru Legacy GT
2009 Subaru Legacy GT
2005-2007 Subaru Outback
2009 Subaru Outback
2005-2007 Subaru Outback XT
2009 Subaru Outback XT
This transmission cooler hose is a direct OEM replacement and is designed for straightforward installation by a qualified technician. Proper installation requires draining or clamping the transmission cooler lines to minimize fluid loss, removing the old hose, and fitting the new OEM hose with factory-spec clamps. We recommend having this service performed by a Subaru-trained technician to ensure correct torque specs and a leak-free seal. Always inspect surrounding hoses and clamps for wear while the cooling system is open.
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