Forester S F4-2.5L DOHC (1998)
(1) Front oxygen sensor
(2) Rear oxygen sensor (California spec. vehicles)
(3) Rear oxygen sensor (Federal spec. vehicles)
(4) Rear catalytic converter
(5) Front catalytic converter
(1) Front oxygen sensor
(2) Rear oxygen sensor (California spec. vehicles)
(3) Rear oxygen sensor (Federal spec. vehicles)
(4) Rear catalytic converter
(5) Front catalytic converter