Parts for your 2015 Subaru Exiga-Radiator

2015 Subaru Exiga Radiator — What it does and how to look after it

Yes, the 2015 Subaru Exiga uses a conventional engine radiator. This is confirmed by Subaru’s factory service manual for the YA-series Exiga (Cooling System section for EJ20/FB25 engines), the Subaru FAST parts catalogue listing a radiator assembly for 2015 Exiga/Crossover 7 variants, and OEM supplier data for the model’s crossflow aluminium/plastic-tank radiator. Being a liquid‑cooled boxer engine, the Exiga relies on a proper radiator to keep temperatures in check.

The radiator’s job is straightforward: it pulls heat out of the engine coolant and dumps it to the air as the car moves or the cooling fans kick in. On the Exiga, that means keeping the FB25 or EJ20 happy under the bonnet, protecting head gaskets, turbos (where fitted), and the CVT or auto transmission cooler that often shares the radiator end tank. When the radiator is healthy, warm-up is quick, the cabin heater works well, and the temperature gauge stays steady even on a hot arvo.

For servicing, they’ll want to keep an eye out for crusty white deposits on the end tanks, damp patches around the seams, brittle hoses, and fins clogged with insects or road grime. Coolant quality matters: Subaru’s long-life “Super Coolant” (blue, premixed) or an equivalent phosphate OAT ethylene glycol coolant is recommended, mixing types is a no‑go. As a guide, coolant should be renewed per the owner’s manual or service schedule—long-life fills can stretch many years, but many workshops in Australia and New Zealand opt for around 5 years/100,000 km to suit local conditions. Always check the logbook for the exact interval.

When replacement is due (or if a leak shows up), it’s smart to do the hoses, clamps, and thermostat at the same time, and fit a new cap with the correct pressure rating. Many Exiga variants route transmission fluid through an internal heat exchanger in the radiator—cap those lines during the job and replace any O‑rings. After filling, bleed the system carefully to purge air, Subaru boxers can trap air pockets that cause hot spots and heater issues. Keep the fins straight and clean (low‑pressure water only), avoid stop‑leak quick fixes, and the Exiga’s radiator will keep doing the hard yakka for years.

• Popular questions about the 2015 Subaru Exiga radiator

What coolant should be used?
Subaru’s genuine long‑life “Super Coolant” (blue, premixed 50/50) is the preferred choice. If that’s not available, use a high‑quality, phosphate OAT ethylene glycol coolant compatible with aluminium engines and Subaru systems. Don’t mix brands or colours, if changing type, flush thoroughly.

How often should the coolant be changed?
Follow the owner’s manual. Many Exiga models with long‑life coolant can run extended intervals, but in Aussie and Kiwi conditions a 5‑year/100,000‑km cadence is common practice. If towing, driving in heat, or after any cooling system repair, bring the interval forward.

Does the Exiga radiator include a transmission cooler?
Most CVT/automatic Exiga variants have an integrated transmission fluid cooler in the radiator end tank. When replacing the radiator, disconnect and cap those lines, use new seals, and check the transmission fluid level after the job.