Parts for your 2017 Subaru Forester-Water pump

2017 Subaru Forester water pump — what it does and when to replace it

Based on Subaru’s factory workshop manuals for the 2017 Forester (Engine: Cooling System), the Subaru Global Parts Catalog, and the AU/NZ Service & Warranty maintenance information, the 2017 Subaru Forester (FB25 2.5‑litre and FA20F 2.0‑litre turbo) is liquid‑cooled and absolutely uses a mechanically driven water pump. Those technical sources list the water pump as a serviceable component and detail inspection and replacement procedures for this model year and engines.

This water pump keeps the Forester’s flat‑four humming by circulating coolant through the block, heads, heater core, and radiator (and the turbo cooling circuit on XT models). Spun by the accessory/serpentine belt, it maintains steady operating temperature, prevents hot spots, and helps deliver reliable cabin heat on frosty mornings. Paired with the thermostat and Subaru’s long‑life blue Super Coolant, it’s central to engine longevity and performance.

There’s no fixed kilometre‑based replacement interval for the pump on these chain‑driven FB/FA engines. Instead, Subaru’s service guidance is to inspect it at regular services. In AU/NZ schedules that’s typically every 12 months/15,000 km. Techs look for coolant weep from the pump vent, staining or crust around the gasket, bearing play at the pulley, belt misalignment, or a high‑pitched whine. Any of those, or rising temps/overheating, means it’s time.

Coolant itself is on a timetable. Models filled with Subaru Super Coolant (blue) have a long initial service life—up to around 11 years/220,000 km per Subaru coolant literature—then periodic changes thereafter. Sticking with the correct Subaru‑approved coolant, not mixing colours, and properly bleeding air after any cooling work keeps the pump happy and cavitation at bay.

• Smart times to replace the pump: when it’s leaking/noisy, alongside a drive belt/tensioner refresh, during major cooling work, or proactively on high‑kilometre vehicles that tow or see hot Aussie/Kiwi summers.
• Good practice on replacement: use a quality or genuine pump, new gasket/O‑ring, fresh coolant, and even torque on the fasteners, inspect the belt, idlers, thermostat and hoses, pressure‑test and road‑test with the heater on to purge air.

Expect typical workshop labour of a couple of hours. The result is stable temps, quieter running, and peace of mind on long Kiwi and Aussie road trips.

Popular questions

Does the 2017 Subaru Forester have a water pump and where is it?
Yes. Both the 2.5‑litre FB25 and 2.0‑litre turbo FA20F engines use a mechanical water pump. It’s mounted at the front of the engine and driven by the serpentine/accessory belt behind the front covers and pulleys. Access is from the front once the belt and related components are out of the way.

When should the water pump be replaced?
There’s no fixed interval for these engines. Replace it if there’s coolant weeping, bearing noise, pulley wobble, overheating, or staining at the gasket. Many owners also choose to fit a new pump when replacing the drive belt/tensioner, or during major cooling system work, to save duplicate labour.

What coolant should be used and how much does it take?
Use Subaru‑approved long‑life coolant (the blue Subaru Super Coolant specified for this model). Capacity varies slightly by engine and spec, but plan on roughly 7–8 litres for a full drain and refill. Always confirm the exact capacity in the vehicle’s service data and bleed the system thoroughly.