WRX Aftermarket Parts Compatibility | Fitment By Year

Subaru WRX parts are built for a specific generation and trim, so 2022–2025 parts rarely fit a 2015–2021 VA car or an STI.

Few upgrades sting like a part that shows up with the wrong bolt pattern. Subaru’s own accessory catalogs tie every number to a model-year range, a trim, and sometimes a single body style — a spoiler listed for a 2023 Base car carries a different part number than the same spoiler for a Premium, Limited, or GT.

Every fitment question reduces to the same three facts, so check WRX aftermarket parts compatibility against your generation, trim, and exact model year before you spend a dollar. What follows is where the differences actually live, how to confirm a part before checkout, and the combinations Subaru says will not install together.

Do 2022–2025 WRX Parts Fit A 2015–2021 Car?

No. The 2022-and-newer WRX and the 2015–2021 VA-generation WRX are separate fitment groups, and nothing crosses over just because both cars wear the same badge.

Subaru’s parts catalog lists the engine under-guard E515SVC000 as fitting the WRX from 2022 through 2024 — a year range, not a name. The 2023 and 2024 brochures run a VC-series family of numbers, and the 2025 catalog adds 2025-only pieces such as the side strake kit E2610VC500. The oil filter 15208AA100 is listed for the 2004–2019 WRX, which says nothing about a 2022 engine.

WRX STI is its own column. The STI shifter bushing B0220FG300 is listed for WRX STI models only, and the STI performance exhaust D441SVA100 fits WRX models while excluding the STI. Treat STI in a listing as a restriction, not a bonus.

WRX Parts Fitment Checks: What Decides The Outcome

A part fits when the catalog’s year range, trim restriction, and install notes all line up with your car. Three checks in that order settle nearly every purchase.

1. Write down the exact model year, trim, transmission, body style, and whether the car is a WRX or a WRX STI. Those five facts are what every fitment filter asks for.
2. Search Subaru’s fitment catalog with the full vehicle description, then confirm both the listed year range and the exact part number — not just the model name.
3. Read the installation notes for exclusions, required companion parts, ground-clearance changes, wheel or TPMS requirements, and trim restrictions.
4. For wheels and suspension, verify diameter, width, offset, bolt pattern, hub bore, brake clearance, tire size, load rating, and TPMS compatibility yourself. Subaru’s accessory documents do not establish that wheels interchange across trims.
5. For roof gear, mount only on compatible crossbars and follow the lowest of the carrier rating, the crossbar rating, and your owner’s manual figure.

Done in that order, you finish with one part number, a year range that includes your car, and install notes that name no exclusion for your trim.

If you would rather start from parts other owners have already run, our tested roundup of WRX aftermarket parts lists the pieces worth matching against your own part numbers.

Trim, Roof, And Wheel Limits That Decide Fitment

Subaru’s brochures print hard exclusions beside the part numbers, and most buyers meet them at the install rather than at checkout.

• Splash guards cannot be used with mud flaps, STI side under spoilers, or STI rear-quarter under spoilers, and Subaru warns that splash guards reduce ground clearance.
• The front strake kit will not install alongside the STI front under spoiler, and the side strake kit will not install with the STI side under spoiler. Subaru’s 2023 WRX accessory catalog prints those conflicts next to the parts.
• The rear bumper diffuser E5610VC550 is not compatible with the exhaust finisher or the STI rear under spoiler, and the exhaust finisher E7710VC500 is not compatible with the rear bumper diffuser.
• The 2025 instrument panel J1310VC621 does not apply to the tS trim.
• Roof capacity follows the hardware: Subaru lists 150 lb for the 2021 crossbar system and 88 lb total for the 2024 fixed crossbar set. Use the lowest of the carrier rating, the crossbar rating, and the owner’s manual figure. The 2024 Thule cargo carrier (65 × 34.5 × 16 in, 13 cu ft), kayak carrier (one kayak up to 36 in wide, 75 lb), and bike carrier (20–29 in bikes, tires to 2.6 in) all need the Subaru crossbar set.
• Wheel sizes split by trim in 2021 — 17 × 8.0 in on the WRX, 18 × 8.5 in on Premium and Limited, 19 × 8.5 in on the STI and STI Limited — and Subaru’s documents do not make them interchangeable.

Buy the part number, not the badge. Confirm the year range, read the install notes, and check the trim restriction before checkout; that order catches every conflict above while it is still a refund instead of a return.