Denso 3439 Spark Plug

Denso Iridium Long Life Spark Plug for Nissan Applications

Denso 3439 is an Iridium Long Life spark plug built for OE-level ignition performance, durability, and emissions control. It uses an iridium center electrode with a platinum needle ground design to support stable spark delivery in demanding daily driving conditions.

Compatible With Nissan Versa, Nissan Kicks, Nissan Sentra, Nissan NV200, Nissan Rogue, and Nissan Altima applications listed below, this Denso Iridium Long Life (SIP) plug is a direct-fit secondary ignition service part for a wide range of late-model and earlier Nissan vehicles.

Key Features

• Part number 3439 from Denso’s Iridium Long Life (SIP) line
• Iridium center electrode tip for consistent ignition performance
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for focused spark delivery
• Copper center electrode core and nickel ground electrode core
• 5000 ohm resistance
• Pre-gapped at 1.1 mm
• Flat seat design with 12.00 mm thread diameter and 14.3 mm hex size
• Manufactured to OE performance, durability, and emissions standards

Product Line Details

Denso’s Iridium Long Life (SIP) line is engineered for service intervals that demand stable ignition characteristics over time. The iridium and platinum electrode materials are selected to maintain spark quality while supporting the OE-style fit and function expected in modern Nissan ignition systems.

Detailed Description

Denso 3439 is a spark plug designed for vehicles that require precise ignition control and long service life. The iridium center electrode tip helps maintain a concentrated spark, while the platinum needle ground electrode supports consistent firing under normal engine loads. With a 1.1 mm pre-gap and OE-style construction, this plug is suited for routine maintenance on Nissan Versa, Sentra, Kicks, NV200, Rogue, Altima, and related applications.

This part cross-references DENSO Auto Parts FXE20HR11 for the same application.

Common Issues This Part Can Address

• Rough idle caused by worn spark plugs
• Hard starting from weakened ignition output
• Misfire conditions related to electrode wear
• Reduced fuel economy from inconsistent spark delivery
• Loss of throttle response due to degraded plug performance

Installation Notes and Tips

• Verify engine application by year, make, and model before installation.
• Confirm the plug seat type, thread diameter, reach, and hex size match the original specification.
• Inspect ignition coils and plug wells during service to avoid repeat misfire concerns.
• Use proper torque procedures for flat-seat spark plugs to help prevent thread or sealing damage.
• Check the gap against the vehicle service specification before installation, even when pre-gapped.

Quality Assurance

Denso manufactures this spark plug to strict OE performance, durability, and emissions standards. It is built as a direct replacement service part for confirmed Nissan applications, including 2022-2023 Nissan Versa, 2018-2021 Nissan Kicks, 2017-2021 Nissan NV200, 2017-2019 Nissan Sentra, and 2007-2016 Nissan Versa.