Toyota GT86 Battery: Specs, Fitment & Common Faults

On the GT86, a battery that keeps going flat despite testing healthy genuinely points toward a parasitic drain, not necessarily the battery itself.

Illustration for editorial purposes

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OEM Part Number: YBX3014

Genuinely important to know, sourced from the GT86 Owners Club forum: some online retailers only list batteries for LHD cars, which puts the terminals on the wrong side — check part numbers carefully to confirm RHD-correct terminal orientation before ordering.

Genuine Yuasa 3000 series reference	YBX3014 — 60Ah, 500 CCA, 232mm x 175mm x 225mm, 15.5kg
Genuine Yuasa 7000 series reference (EFB, better durability)	YBX7014 — 65Ah, 620 CCA, 232mm x 173mm x 225mm, 17.3kg
Important	Both Yuasa options genuinely improve on the standard 45Ah fitted to some cars — the 7000 series EFB is worth the extra cost for durability if your GT86 sees frequent short journeys.

A Genuinely Useful Distinction Worth Knowing Before Blaming the Battery — Toyota GT86 Battery

A flat battery on a conventional petrol or diesel Toyota is genuinely often a symptom rather than the root cause — a battery that keeps going flat despite being tested as healthy points toward a parasitic drain somewhere in the electrical system, rather than the battery itself being at fault. Before replacing the battery on a hunch, it's genuinely worth having a proper drain test done, since replacing a battery that wasn't actually the problem just delays finding the real cause.

Worth knowing about extended periods of standing: Toyota's official guidance for any car sitting unused for an extended period, hybrid or otherwise, includes periodic use or a trickle charger to avoid a flat battery — genuinely worth doing on a car that sits for more than a couple of weeks at a time, particularly in colder weather when battery capacity is naturally reduced.

It's also worth knowing that modern cars, including older conventional Toyota models, carry more permanently-live electrical draw than owners often expect — alarm systems, clock memory, and various modules all draw a small amount of current even with the ignition off, meaning a battery in genuinely marginal health can go flat from ordinary standing that wouldn't have affected a healthier battery.

Toyota GT86 Battery: The Part Everyone Blames First, Not Always Correctly

When a Toyota GT86 won't start, the battery is the first suspect more often than anything else, and it's right often enough that checking it first is a reasonable move. It isn't always the actual cause though, which is worth knowing before paying for a replacement that solves nothing.

Before you buy: battery size, capacity and type (standard vs AGM/EFB for stop-start systems) vary by trim and engine. Always confirm against your VIN before ordering.

Toyota GT86 Battery: What It Does

Starting the engine and running electrical systems whenever the engine isn't turning — that's the Toyota GT86's 12V battery job. If it has stop-start, it works much harder than older designs, since the engine cuts out and restarts constantly, which is exactly why it needs a specific AGM or EFB battery rather than a standard one.

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Toyota GT86 Battery: Warning Signs, DIY Difficulty & Aftermarket Advice

These are the same regardless of make or model — see our full Battery Guide for warning signs to watch for, confirming fitment against your VIN, and matching the right technology (standard, EFB, AGM) when buying aftermarket.

More Toyota Battery

The same part, covered across other Toyota models.