Spark Plugs — Price Comparison

Spark Plugs for 2023 Hyundai Sonata

Spark plugs on a 2023 Hyundai Sonata are a wear item with a precise replacement interval, and using the right electrode material matters more than brand. Iridium and platinum plugs hold their gap for 60–100k miles; copper plugs spark marginally better but need replacement three times as often.

We compared 5 offers across major retailers for the DN8 platform (2020–2026 DN8). Prices range from $9.99 to $35.99 as of the last update.

Best picks

• Best overall: The iridium plug matching your engine's factory specification — same heat range, same gap, longest service life.
• Best budget: Copper-core plugs if you don't mind 20–30k mile intervals — they're cheap enough to replace often and conduct slightly better.

What to look for

• Never downgrade from factory iridium to copper on engines specced for long-life plugs.
• Buy the full cylinder count from one production lot — mixing plug states causes uneven running.
• Coil-on-plug engines: inspect the coil boots while you're in there; they're the usual failure companion.

Sedan note: parts for high-volume sedans are commodity-priced, which works in your favor — the brand-name option frequently costs within a few dollars of the budget pick. Buy on warranty and reviews rather than price alone.

Fitment note

Verified for 2023 Hyundai Sonata (DN8). Fits 2020–2026 DN8 generation unless trim-specific exclusions apply. Confirm trim and option codes before ordering.

Prices are affiliate-linked estimates. Confirm current pricing at the merchant before purchase.