The 2018 Subaru WRX uses a cartridge-style oil filter. The commonly cited OEM cartridge for many FA-series engines is PF63, but exact part numbers can vary by market and production run, so it’s best to verify with your VIN or by checking the filter you remove.
In more detail, the WRX in this year range uses a filtering system where a replaceable cartridge sits inside a housing rather than a traditional spin-on canister. Because Subaru occasionally updates part codes by region and production, the precise number printed on the filter or listed in a parts lookup may differ. When shopping for parts, use year, make, model, and if possible the vehicle identification number to ensure you get the correct cartridge for your car.
How to identify the correct filter
Before listing common references and options, here’s how to confirm the right filter for your car.
- Recognize the cartridge style: The WRX uses a cartridge element inside a housing that you replace during an oil change, not a full spin-on canister.
- Check the OEM code on the removed filter: PF63 is a widely used cartridge code for FA-series engines, including the 2015–2021 WRX, though regional variations may apply.
- Verify with a retailer or dealer: Use your VIN or the exact year/model to cross-check fitment and avoid ordering the wrong part; many retailers list PF63-compatible cartridges for this engine family.
Conclusion: While PF63 is a common OEM reference for this generation, always confirm the exact part number against your vehicle’s specifics to ensure proper fit and sealing.
Summary
Bottom line: The 2018 WRX takes a cartridge-style oil filter (not a spin-on canister), with PF63 being the typical OEM code cited for the FA20 engine family. Verify by checking the installed filter, your VIN, or a trusted parts lookup to ensure you purchase the correct cartridge for your car.