What are the best spark plugs for a Toyota Prius, and does using the wrong type cause issues?

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What are the best spark plugs for a Toyota Prius, and does using the wrong type cause issues?

Toyota recommends iridium spark plugs for the Prius, but some mechanics install cheaper copper o r platinum alternatives. What are the risks of using non-recommended spark plugs, and which brands are best?

Zarnish asked on 14 Feb 2025 16:33:17 pm

1 Answer

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Car Mechanic Expert - on 14 Feb 2025 16:44:19 pm

Toyota recommends using iridium spark plugs for the Prius because of their longevity and efficiency. Iridium spark plugs have a fine tip that lasts longer and is more resistant to wear.

Risks of using the wrong type:

Copper o r platinum spark plugs: While cheaper, these can wear out faster, reducing engine performance and fuel efficiency.
Incorrect heat range: Using spark plugs with the wrong heat range can lead to misfires, poor fuel economy, o r engine damage.

Best brands for Toyota Prius spark plugs:

NGK original equipment quality.
Denso another reliable brand.

Always choose spark plugs that meet the manufacturer’s specifications for your Prius model.