ToyotaSienna2021
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  4. 2021

2021 Toyota Sienna spark plugs

Catalog listings with year/make/model fitment rows. A listing is not OEM confirmation.

Catalog year/make/model rows for 2021 Toyota Sienna.

Autolite

Double Platinum Spark Plug: Enhanced Durability & Performance, APP5684

MPN: APP5684

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Autolite Iridium

Iridium Ultra Fine Wire Spark Plug: Laser Welded for Precision, AI5684

MPN: AI5684

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Autolite Iridium

Iridium XP Fine wire Spark Plug: Improved Durability, More Focused Ignition, XP5684

MPN: XP5684

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Champion

Iridium Spark Plug REA12WMPB - Maximum Performance & Longevity, 9410

MPN: 9410

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DENSO

Iridium Long-Life Spark Plug: Super Ignition, OE Performance, FC16HR-Q8, 3524

MPN: 3524

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E3

DiamondFIRE Automotive Spark Plug: More Power & Fuel Efficiency, E3.81

MPN: E3.81

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Fitment comes from `affiliate_feed_product_fitment` year/model rows (SparkPlugs-style YMM). Do not treat a title match as guaranteed compatibility.