Hyundai i30 Battery: Specs, Fitment & Common Faults

On the i30, a documented case genuinely traced an intermittent drain spike to the "memory fuse" — pulling it reduced the drain to zero.

Illustration for editorial purposes

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OEM Part Number: 450-540A

Genuinely important to know: the same 1.4/1.6 petrol engine genuinely requires a different battery depending on whether Start/Stop is fitted — don't assume engine size alone determines the correct battery.

1.4/1.6 petrol, without Start/Stop	50-54Ah, 450-540A (EN), standard lead-acid, 207-210mm case
1.4/1.6 petrol, with Start/Stop	60-62Ah, 640-680A (EN), AGM technology required
2.0 CRDi diesel	Minimum 67Ah, 260-270mm case, larger than the petrol variants
Current generation N/Fastback, Start/Stop	70Ah, 760A (EN), AGM or EFB depending on exact trim

A Genuinely Specific, Real Fix Worth Knowing About — Hyundai i30 Battery

If your battery keeps going flat within just a few days despite testing as healthy, this is genuinely worth knowing: one documented case on a related Hyundai model found the background drain spiking briefly every few seconds, tracked down to a component sometimes referred to as the "memory fuse" — pulling this specific fuse reduced the drain to zero completely. If you're chasing a similar intermittent spike pattern rather than a constant drain, it's worth specifically testing this fuse.

A genuinely useful diagnostic benchmark worth knowing: typical background drain on a healthy, switched-off car should be under 50 milliamps — testing with a multimeter and isolating circuits by removing fuses one at a time can help identify which specific circuit is responsible if yours is measuring higher.

It's also worth knowing a genuinely practical jump-start technique if the standard method fails: connecting the jump leads plus-to-plus and minus-to-minus directly between batteries, rather than the more commonly recommended minus-to-engine-block method, has resolved cases where a standard jump start attempt failed despite the dashboard and accessories powering up correctly.

Hyundai i30 Battery: The Part Everyone Blames First, Not Always Correctly

On the Hyundai i30, the battery takes the blame for most no-start situations, and often rightly so — it's a sensible first check. But it isn't always the genuine cause, which is worth establishing before paying for a new one that turns out not to solve anything.

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.

Hyundai i30 Battery: What It Does

The Hyundai i30's 12V battery handles engine starts and keeps electrical systems running whenever the engine isn't. On stop-start versions, that job gets much harder, since the engine switches off and restarts constantly — which is why it specifically needs an AGM or EFB battery, not a standard one.

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Hyundai i30 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 Hyundai Battery

The same part, covered across other Hyundai models.