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2018-2023 Subaru Crosstrek
2014-2018 Subaru Forester
2007, 2009-2014 Subaru Legacy
2010-2014 Subaru Outback
2004-2010, 2012-2021 Subaru STI
2015-2021, 2022-2026 Subaru WRX
The Genuine Subaru OEM Crush Gasket (Part #803908050) is an essential sealing component designed to provide a leak-free connection at oil drain plugs, banjo bolts, or other critical fluid fittings on your Subaru STI. Built to exact factory specifications, this OEM replacement gasket ensures a perfect fit and reliable seal every time — making it the trusted choice for routine oil changes and fluid system maintenance on 2004–2021 Subaru STI models.
| Part Number | 803908050 |
|---|---|
| Brand | Genuine Subaru OEM |
| Type | Crush Gasket / Drain Plug Gasket |
| Material | Metal (Aluminum/Copper Alloy) |
| Application | Oil Drain Plug / Fluid Fitting Seal |
| Usage | Single-Use (Replace with every oil change) |
| Compatible Years | 2004–2021 |
| Compatible Model | Subaru STI (Impreza WRX STI / WRX STI) |
Installation is straightforward and recommended as part of every routine oil change. Remove the oil drain plug, discard the old crush gasket, clean the mating surface, place the new OEM crush gasket onto the drain plug, and reinstall to the manufacturer's recommended torque specification. Because this is a single-use crush gasket, it must be replaced each time the drain plug is removed — reusing a crush gasket can result in oil leaks. No special tools are required; this is a DIY-friendly service item suitable for home mechanics and professional technicians alike.
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