Denso 3459 Spark Plug

Denso Iridium Long Life Spark Plug 3459

Denso 3459 is an Iridium Long Life spark plug built for OE-level performance, durability, and emissions control. It uses an iridium center electrode with a platinum needle ground design to support stable ignition and consistent combustion in demanding daily driving and performance applications.

The Iridium Long Life (SIP) line focuses on extended service life and precise spark delivery. For drivers servicing a Dodge Challenger, Dodge Charger, Ram 1500, Jeep Grand Cherokee, Volvo S60, or Hyundai Genesis Coupe, this plug matches the factory-style specifications needed for proper ignition system operation.

Key Features

• Part number 3459 from Denso
• Iridium center electrode tip material for durable spark performance
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for focused ignition
• 5000 ohm resistance
• 0.8 pre-gap size for OE-style setup
• 14.00 mm thread diameter, 26.50 mm reach, and 16.0 mm hex size
• Flat seat design with one ground electrode
• Manufactured to meet strict OE performance, durability, and emissions standards

Detailed Description

Denso 3459 is an Iridium Long Life spark plug engineered for vehicles that require a precise OE replacement in the secondary ignition system. The copper core center electrode helps manage heat transfer, while the iridium tip supports long-term spark stability. The platinum needle ground electrode and needle-to-needle configuration are used to promote consistent ignition under load and during repeated starts. This part cross-references DENSO Auto Parts FK20HQR8 and Hyundai 18845-08200 for the same application.

Compatible With 2023 Dodge Challenger, 2023 Dodge Durango, 2023 Ram 1500, 2015-2022 Dodge Challenger, 2016-2022 Dodge Charger, 2021-2022 Ram 1500, 2021 Dodge Durango, 2018-2021 Jeep Grand Cherokee, 2015-2016 Volvo S60, 2016 Volvo S60 Cross Country, 2015-2016 Volvo V60, 2015-2016 Volvo V60 Cross Country, 2015-2016 Volvo XC60, 2015-2016 Volvo XC70, 2015 Volvo S80, and 2010-2012 Hyundai Genesis Coupe, N/A.

What It Helps Address

• Misfires caused by worn or inconsistent spark plugs
• Hard starting from degraded ignition performance
• Rough idle and uneven combustion
• Reduced fuel efficiency from weak spark delivery
• Emissions issues related to aging secondary ignition components

Installation Notes and Tips

Verify the thread diameter, reach, seat type, and pre-gap before installation. Use the vehicle service specification for final gap confirmation and torque, and inspect the ignition coils and plug wells for wear or contamination while servicing the plugs. For fitment, confirm the exact model year and engine application on Dodge Challenger, Dodge Charger, Ram 1500, Jeep Grand Cherokee, Volvo S60, and Hyundai Genesis Coupe listings before ordering.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards. The Iridium Long Life (SIP) design is built around factory-style specifications for dependable ignition service in the listed applications.