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Air filter Subaru Forester SK FB25 (2.5) — Mann, Mahle, Filtron

Air filter for Subaru Forester SK FB25 (2.5L, 2018–2023) — dimensions, Mann, Mahle, Filtron, WIX and Hengst part numbers, and replacement interval.

Technical Specifications

ParameterValue
Make / ModelSubaru Forester SK
Engine CodeFB25
Displacement / Fuel2.5L petrol
Production Years2018–2023
Filter size290×210×60 mm
Replacement interval20 000 km

Compatible Air Filters

BrandPart Number
Mann-FilterMann C35HS
Mahle / KnechtMahle LX2830
FiltronFiltron AP131
WIX FiltersWIX WA9756
HengstHengst E1208L

Replacement Interval

Replace the air filter every 20 000 km or once a year, whichever comes first.

In urban environments with high dust levels, replace more frequently — every 10,000–12,000 km.

Signs of a Clogged Air Filter

  • Increased fuel consumption of 5–10%
  • Reduced acceleration performance
  • Black smoke from the exhaust (diesel engines)
  • Fault code P0171/P0174 (lean mixture) on petrol engines
  • Visibly dark, dirty filter element on inspection

FAQ

Which air filter fits Subaru Forester SK FB25?

Mann Mann C35HS, Mahle Mahle LX2830, Filtron Filtron AP131. Filter dimensions: 290×210×60 mm.

How often should the air filter be changed on Subaru Forester SK?

Every 20 000 km or annually. On unpaved or dusty roads, replace every 8,000–10,000 km.

Can the air filter be cleaned instead of replaced?

Disposable paper filters (Mann C35HS, Mahle LX2830) are not washable. Washing destroys the filter medium and compromises filtration. Always fit a new filter.