2021 SUBARU Legacy FB25/FA24F (BN/BS)
BN/BS / Sedan / Wagon / North America, Japan, Australia (varies by market)
FB25FA24FExact year/trim recordSilver
Engine identity
Oils and fluids
Service and parts data
Common and chronic problems
- Oil consumption in early FB25 engines reported, improved in 2021 models
- CVT issues rare but require fluid changes as per schedule
First checks
- Inspect CVT fluid level and condition
- Check timing chain noise and oil consumption
Before replacing parts
- Save fault codes and freeze-frame data before clearing anything.
- Check engine oil, coolant and transmission fluid using the correct temperature and service procedure.
- Verify power, ground, connectors, hoses, leaks and live data before replacing expensive parts.
Important notes
- Market variations significantly affect engine and transmission availability; North America offers both FB25 and FA24F, while some other markets primarily have FB25.
- Legacy 2021 model received updates increasing power and improving CVT calibration.