Pronto PO4459-SB1 Engine Oil Filter

OE Style Oil Filter for Subaru Applications

The Pronto OE Style engine oil filter is built for Subaru owners who want a direct-fit spin-on filter with the core features needed for reliable oil control. Part number PO4459-SB1 is made for select Subaru Legacy, Outback, Tribeca, and B9 Tribeca applications and follows OE-style dimensions for straightforward replacement service.

Key Features

• Spin-on engine oil filter design
• Anti-drain back valve helps retain oil in the filter after shutdown
• Bypass relief valve supports oil flow during cold starts or restricted flow conditions
• 3.01 in. height for OE-style fitment
• 3.16 in. outside diameter at the top
• M20x1.5-6H inside thread size
• Closed bottom construction

Product Details

Pronto OE Style PO4459-SB1 is an engine oil filter for Subaru vehicles that use the specified spin-on filter format and thread size. The anti-drain back valve helps keep oil in the filter when the engine is off, while the bypass relief valve provides a flow path if the filter media becomes restricted. This makes it a practical replacement choice for routine oil service on Subaru Legacy, Subaru Outback, Subaru Tribeca, and Subaru B9 Tribeca models within the listed years. This part cross-references Subaru 15208AA031 for the same application.

Vehicle Fitment

• Fits 2009-2019 Subaru Legacy, N/A
• Fits 2001-2019 Subaru Outback, N/A
• Fits 2008-2014 Subaru Tribeca, N/A
• Fits 2006-2007 Subaru B9 Tribeca, N/A

Common Service Issues Addressed

• Oil filter replacement during scheduled maintenance
• Loss of oil retention after engine shutdown
• Restricted oil flow during cold starts
• Replacing a worn or clogged spin-on oil filter
• Restoring OE-style filter dimensions for Subaru oil service

Installation Notes and Tips

Verify the thread size, height, and outside diameter before installation to confirm the filter matches the engine’s OE-style specification. Install the filter according to the vehicle service procedure, and pre-fill only if the manufacturer’s service instructions call for it. For Subaru Legacy, Outback, Tribeca, and B9 Tribeca oil changes, confirm the engine application against the vehicle’s service information before final installation.

Quality Assurance

Pronto OE Style parts are built around OE-style replacement specifications for direct service use. PO4459-SB1 is engineered to match the listed dimensions and filter features required for the confirmed Subaru applications.