Subaru Engines

FB16

FB16 1.6 Boxer

2016–present

XV, XV/Crosstrek, Impreza

Impreza V/XV/Crosstrek. Chain driven. Subaru's entry boxer. Head gasket (less se...

FB25

2.5L Boxer I4

2010–present

Forester, Outback, Legacy, XV, Impreza, WRX

Outback/Forester. More torque than FB20. Same oil consumption concern. Good with...

FA24

2.4L Turbo Boxer I4

2019–present

GR86, BRZ, WRX, Forester 2.5i XT, Legacy 2.5i, Outback 2.5i

Outback XT/WRX (2022+)/BRZ Turbo. Larger displacement = more relaxed. Promising ...

FB20

2.0L Boxer I4

2010–present

Levorg, Impreza, Forester, Legacy, BRZ, WRX, XV/Crosstrek, XV, Crosstrek, Impreza 2.0i

XV/Forester/Impreza. Boxer layout = low center of gravity. Oil consumption at hi...

FA20DIT

2.0L DI Turbo Boxer I4

2014–2021

WRX engine (non-STI). Direct injection turbo boxer. Carbon buildup. Better than ...

EJ20 NA

EJ20 2.0 Boxer NA

1989–2020

Impreza/Forester NA. Head gasket failure is THE Subaru issue (external leak). Oi...

FB16DIT

FB16DIT 1.6 Turbo Boxer

2014–2020

Levorg

Levorg. Turbocharged version of FB16. Chain driven. CVT only. Turbo reliable. Oi...

EJ20 Turbo

2.0L Turbo Boxer I4

1994–2020

WRX STI 2.5T

WRX/STI legend. Unequal-length headers = boxer rumble. Head gasket concerns. Mai...

EE20

EE20 2.0 Boxer Diesel

2008–2020

Impreza/XV/Forester diesel. Only Boxer diesel ever mass produced. DPF issues end...

EJ25 NA

2.5L NA Boxer I4

1996–2020

Outback/Forester/Legacy. Head gasket failure is endemic — external oil leak type...