Parts for your 2017 Subaru Exiga-Batteries

2017 Subaru Exiga batteries: what they do and how to look after them

Batteries are absolutely relevant to the 2017 Subaru Exiga. Technical sources including the Subaru Exiga/Exiga Crossover 7 Owner’s Manual (2017 JDM) and the YA-series service manual specify a 12‑volt starting/lighting/ignition (SLI) battery, with start‑stop equipped trims requiring an EFB or AGM type in JIS sizes such as Q85 or 55D23L. These align with JIS D5301 battery standards used by Subaru across late‑model petrol platforms.

In this Exiga, the battery’s main job is cranking the engine and keeping the vehicle’s electronics happy when the engine’s off or idling. It stabilises voltage for the ECU, infotainment, lighting, and safety systems (including EyeSight on applicable trims). On start‑stop variants, it also copes with frequent restarts, so the right spec battery is critical.

When it’s time for servicing, a quick battery health check is smart. A technician will measure open‑circuit voltage, perform a load or conductance test, and confirm the alternator is charging around 13.8–14.6 V. They’ll also inspect terminals, the hold‑down clamp, and any signs of swelling or electrolyte seepage. For start‑stop Exigas, replacing like‑for‑like (EFB with EFB or AGM) matters—don’t downgrade to a conventional flooded unit or start‑stop performance and battery life will suffer.

Replacement tips owners will appreciate:

• Match the JIS size, terminal orientation (typically left‑positive), and cold cranking rating to Subaru’s spec.
• Use a memory saver if possible, after a swap, reset the clock and re‑initialise auto windows as needed. Some cars may need a brief idle relearn.
• Clean terminals with a proper terminal brush and apply a light protective spray to reduce corrosion.
• If the stop‑start feature is intermittently disabled, that’s often a sign the battery is below ideal state of charge.

In Aussie and Kiwi conditions, expect roughly 3–5 years from a quality battery, start‑stop types may trend closer to 2–4 years depending on driving patterns. Short trips, lots of accessories under the bonnet, and long sits can shorten lifespan—an occasional longer run helps the alternator top things up. Always recycle the old unit through a battery retailer or service centre.

Popular questions

What battery type does a 2017 Subaru Exiga use?
Most use a 12 V JIS‑spec battery such as 55D23L, start‑stop trims typically require an EFB or AGM in sizes like Q85. Always confirm against the vehicle label or the owner’s manual to match capacity and terminal layout.

How long should the battery last in a 2017 Exiga?
Around 3–5 years is common for quality flooded batteries, while EFB/AGM start‑stop units often see 2–4 years. Heat, short trips, and high accessory loads can bring that down, so periodic testing during services is a good shout.

Can a weak battery affect EyeSight or stop‑start?
Yes. Low voltage can disable stop‑start and may prompt warnings for driver‑assist systems. If those features go offline and cranking is slower than usual, a battery test is worthwhile before chasing other faults.