Denso 3450 Spark Plug

Denso Iridium Long Life Spark Plug for Nissan and Hyundai

Denso 3450 is an Iridium Long Life spark plug built for OE-level performance, durability, and emissions control. It is a direct-fit ignition component for select Nissan, INFINITI, Hyundai, Kia, and Suzuki applications, including Nissan Frontier, Titan, Armada, Xterra, Pathfinder, NV1500, NV2500, and NV3500 models.

The Iridium Long Life (SIP) product line focuses on extended service life and stable ignition performance. Denso 3450 uses an iridium center electrode, a platinum needle ground tip, and a needle-to-needle ground configuration to support consistent spark delivery in demanding secondary ignition systems.

Key Features

• Iridium center electrode tip material for long-life ignition performance
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for focused spark exposure
• 5000 ohm resistance for OE-style ignition circuit control
• Pre-gap size: 1.1 mm
• 14.00 mm thread diameter with flat seat design
• 26.50 mm reach and 16.0 mm hex size
• Manufactured to OE performance, durability, and emissions standards

Detailed Description

Denso 3450 is engineered as an OE-recommended replacement spark plug for a wide range of Nissan V6 applications, including the 2007-2015 Nissan Titan, 2007-2015 Nissan Armada, 2008-2015 Nissan Xterra, 2008-2012 Nissan Pathfinder, and 2008-2016 Nissan Frontier. It also fits select NV1500, NV2500, and NV3500 vans, plus related applications such as the 2007-2010 INFINITI QX56, 2009-2012 Hyundai Genesis, 2011 Hyundai Equus, 2009-2010 Kia Borrego, and 2009-2012 Suzuki Equator. The Denso 3450 part number is also referenced in OE cross-application listings for select Datsun/Nissan and Hyundai part numbers.

The Iridium Long Life (SIP) line is designed around a fine-wire iridium center electrode and platinum ground tip to maintain reliable ignition characteristics over extended service intervals. For buyers searching for a Nissan Frontier spark plug, Nissan Titan spark plug, or Denso 3450 replacement, this part matches the factory-style dimensions and electrical characteristics needed for proper fitment.

Common Issues This Part Can Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weakened ignition output
• Misfire codes related to degraded spark delivery
• Reduced fuel economy from inefficient combustion
• Loss of throttle response under load

Installation Notes and Tips

Verify engine application, thread reach, seat type, and pre-gap before installation. Use the specified torque procedure for the engine and inspect ignition coils, boots, and wiring while servicing the plugs. For Nissan Frontier, Titan, Armada, Pathfinder, and Xterra applications, confirm the exact engine code and model year against the vehicle catalog before ordering.

Quality Assurance

Denso manufactures this spark plug to meet strict OE performance, durability, and emissions standards. The Iridium Long Life (SIP) design is intended to deliver consistent ignition quality in factory-style applications where long service life and stable combustion are required.