Parts for your 2017 Subaru Forester-Drive belt

2017 Subaru Forester drive-belt — purpose, service tips, and FAQs

Technical sources confirm the 2017 Subaru Forester is fitted with an accessory drive-belt (often called a serpentine or V‑ribbed belt). The Subaru Service Manual for the SJ-series Forester (FB20/FB25 petrol, FA20 turbo petrol, and EE20 diesel) details inspection and replacement of the V‑ribbed belt, and Subaru’s AU/NZ maintenance schedules list accessory belt checks at routine services. Independent catalogues from Gates and Dayco also specify belt part numbers for this model year. On these engines, the belt drives the alternator and air‑conditioning compressor, the water pump is timing‑chain driven on FB/FA petrol engines, and power steering is electric, so not belt‑driven.

On a 2017 Forester, the drive-belt’s job is simple but crucial: keep the battery charged via the alternator and run the A/C compressor so the cabin stays comfortable. If the belt slips or fails, charging will drop, warning lights will flare up, and the A/C will quit. Because most variants use electric power steering and a chain‑driven water pump, a failed belt won’t usually overheat the engine immediately, but it will leave the vehicle at risk of stalling once the battery drains.

Best practice is to have the belt inspected at every service for tension, tracking, and condition. Modern EPDM belts don’t always crack visibly, so mechanics look for glazing, rib wear, frayed edges, chirps/squeals on cold start, or rubber dust around the pulleys. Many owners choose preventative replacement somewhere between 90,000 and 150,000 kilometres, or at 6–8 years, whichever comes first, especially if driving in hot climates, towing, or doing lots of short trips.

When replacing the belt, a proper belt routing diagram and a quality belt from a known brand make life easier. A technician will:

• Check the automatic tensioner and idler pulleys for smooth, quiet rotation.
• Inspect the A/C and alternator pulleys for wobble or roughness.
• Fit the new belt and verify the ribs sit cleanly in all grooves.
• Run the engine and listen for noise whilst watching for stable belt tracking.

Owners can help the belt last by keeping the front of the engine free from oil leaks, replacing any noisy idlers promptly, and avoiding belt dressings that mask noise without fixing the cause. A tidy belt system under the bonnet means a reliable Forester on the road.

Popular questions about 2017 Subaru Forester drive-belt

How often should the drive-belt be replaced?

There isn’t a strict kilometre interval from Subaru, they specify regular inspection and replacement if worn. Many workshops in Australia and New Zealand recommend preventative replacement around 90,000–150,000 km or 6–8 years, sooner if there’s noise, glazing, or rib wear. High-heat, dusty, or stop‑start driving may justify earlier change-outs.

What are the signs the belt needs attention?

Cold-start squeals, chirping at idle, visible glazing or frayed edges, charging warning lights, or a sagging/oscillating belt are common clues. Rubber dust near the crank or alternator pulley is another giveaway. If the A/C cuts out or the battery light pops up intermittently, have the belt system and pulleys checked.

Can it be driven if the belt snaps?

It may run briefly on battery power, but it’s not wise. With no alternator, voltage will drop and the vehicle can stall without warning. The A/C will also stop. It’s safer to arrange a tow and avoid risking a roadside breakdown or further damage to pulleys and the tensioner.

Technical sources referenced: Subaru Forester SJ Series (2017) Factory Service Manual — Engine (FB/FA/EE) V‑ribbed belt section, Subaru AU/NZ Warranty & Maintenance schedules listing accessory drive belt inspections, Gates and Dayco AU/NZ belt catalogues for 2017 Forester applications.