Our 2001 Infiniti QX4 Spark Plug 22401-1W615 ships directly from an authorized Infiniti dealer. Since 2000 we have offered secure online ordering and fast affordable shipping. All our genuine Infiniti parts and Infiniti accessories are backed by Infiniti's warranty, which is covered by any Infiniti dealer in the US. Exactly like your local dealer only lower prices and shipped directly to your door. If you have questions about Infiniti accessories or Infiniti performance parts or need assistance, please don't hesitate to contact our friendly Infiniti parts and accessories experts online.