Subaru Forester: Maintenance and service / Spark plugs

Air cleaner element

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Drive belts

It is unnecessary to check the deflection of the drive belt periodically because your engine is equipped with an automatic belt tension adjuster. However, replacement of the belt should be done according to the maintenance schedule in the “Warranty and Maintenance Booklet”...

Other information:

Subaru Forester 2019-2026 Owners Manual: Tire pressure monitoring system (TPMS) (U.S.-spec. models)

The tire pressure monitoring system provides the driver with a warning message when tire pressure is severely low. The tire pressure monitoring system will activate only when the vehicle is driven at speeds above 20 mph (32 km/h). Also, this system may not react immediately to a sudden drop in tire pressure (for example, a blow-out caused by running over a sharp object)...

Subaru Forester 2019-2026 Owners Manual: Wear indicators

New tread Worn tread Tread wear indicator Each tire incorporates a tread wear indicator, which becomes visible when the depth of the tread grooves decreases to 0.063 in (1.6 mm). A tire must be replaced when the tread wear indicator appears as a solid band across the tread...