Parts for your 2017 Subaru Legacy-Radiator

2017 Subaru Legacy radiator: what it does and how to look after it

Yes, a radiator is absolutely used on the 2017 Subaru Legacy. Technical references including the Subaru Factory Service Manual (Cooling section), the Owner’s Manual coolant and cap guidance, and Subaru’s genuine parts catalogue all list an aluminium crossflow radiator with electric cooling fans for the 2.5-litre and 3.6-litre engines. That makes the radiator a core component of the Legacy’s liquid-cooling system.

On this model, the radiator’s job is to pull heat out of the engine coolant so the boxer engine stays in its sweet spot for performance and longevity. Coolant cycles from the engine to the radiator, air moves through the fins (helped by twin electric fans at low speed or under the bonnet in traffic), and the heat is dumped to atmosphere. Many CVT-equipped cars also use engine coolant to help regulate transmission fluid temperature via a heat exchanger, so keeping the cooling system tidy can benefit the gearbox too.

For servicing, their 2017 Legacy likes fresh, correct-spec Subaru long‑life (blue) coolant mixed 50/50 with demineralised water if not pre‑mixed. The factory fill is a long interval coolant