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Denso Warranties

Most Denso products are warranted to the purchaser for 12 months from the date of purchase against defects in materials and workmanship. 

Warranty Claims

If your Denso product was purchased from the SparkPlugs.com Family (SparkPlugs.com or DensoProducts.com), simply contact customer service at 888-800-9629 or cust@sparkplugs.com for a speedy resolution.

If your Denso product was purchased elsewhere, contact Denso directly for warranty support.

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