Parts for your 2016 Subaru Impreza-Radiator

2016 Subaru Impreza radiator — what it does and how to look after it

Based on Subaru’s 2016 Impreza Factory Service Manual (Cooling System) and the Subaru Electronic Parts Catalogue, the 2016 Subaru Impreza runs a liquid-cooled engine with an aluminium crossflow radiator and electric cooling fans. The radiator is absolutely fitted and essential—it’s not an optional or irrelevant part on this model.

On a 2016 Impreza, the radiator’s job is to pull heat out of the engine coolant and keep the FB-series 2.0‑litre boxer running at the sweet spot for performance, economy, and longevity. Coolant flows from the engine through the radiator core, sheds heat with help from airflow and the twin fans, then heads back, regulated by the thermostat. That stable temperature helps protect head gaskets, prevents detonation, and keeps oil viscosity in the right range. The air‑conditioning condenser sits in front, and the whole stack relies on clean fins and good fans to do their thing, especially in Aussie and Kiwi summers.

Servicing is straightforward: check coolant level and condition at each service, inspect the radiator cap, hoses, clamps, and the plastic end tanks for hairline cracks or staining. Keep the fins clear of bugs and debris using low-pressure water from the front—no harsh sprays that fold fins. Always use the Subaru‑specified long‑life coolant (the blue, phosphate OAT type or OEM‑equivalent), premixed to the correct ratio, and don’t mix coolant types. Bleeding air properly after any cooling work is crucial to avoid hot spots and false overheating.

• Signs it’s time to act: creeping temps under load or at idle, coolant loss, sweet smell under the bonnet, discoloured or sludgy coolant, stained tanks, bent or corroded fins, or fans not cutting in.

When replacement’s on the cards, go for an OEM or high‑quality radiator matched to the Impreza’s mounts and hose sizes. It’s smart to combine the job with fresh hoses, clamps, and a new cap, and to pressure‑test before handing back the keys. Many workshops will also recommend a thermostat and a thorough system flush. In harsher conditions—stop‑start commuting, towing, gravel roads, or coastal air—step up inspections and keep the fins extra clean. Follow the Subaru service schedule for coolant change intervals in the owner’s manual, and the Impreza’s cooling system will stay happy for the long haul.

Popular questions

What coolant should go in a 2016 Subaru Impreza radiator?
Subaru specifies a long‑life, blue phosphate OAT coolant (often sold as Subaru Super Coolant) or an OEM‑equivalent that meets the same chemistry. Use a proper premix and avoid mixing types, if an emergency top‑up with water is unavoidable, restore the correct coolant mix as soon as possible.

How often should the radiator be replaced?
There’s no fixed time-based interval for the radiator—replace on condition. Inspect it at each service for leaks, cracked plastic tanks, corrosion, damaged fins, or poor fan operation. Change coolant per the Subaru schedule in the owner’s manual, prolonged neglect of coolant is what usually shortens radiator life.

Is it safe to drive with a leaking radiator?
It’s risky. Even a slow leak can quickly lead to overheating, which can damage gaskets and the engine. If the low coolant warning or temp gauge climbs, stop safely, let it cool, and arrange a tow or mobile help rather than pushing on.