Subaru uses a four or five character code to identify all of their engines.[1] As of August 2022 these are the engines presently in models sold by Subaru
- FB20D: 1995 cc DOHC, 2017+ Subaru Impreza, and 2018+ Subaru Crosstrek
- FB25D: 2498 cc DOHC, 2019+ North American Subaru Forester, 2020+ North American Subaru Legacy, 2020+ North American Subaru Outback, and 2021+ North American Subaru Crosstrek
- FA24D: 2,387 cc DOHC, 2022+ Subaru BRZ/Toyota 86
- FA24F: 2,387 cc DOHC, turbo, 2019+ USDM Subaru Ascent, 2020+ Subaru Legacy, and 2020+ Subaru Outback. 2021+ USDM Subaru WRX
- CB18: 1795 cc DOHC, 2020 JDM Subaru Levorg, 2021 JDM Subaru Forester