Denso 3495 Spark Plug

Denso Iridium Long Life Spark Plug 3495

Denso 3495 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 modern Hyundai, Kia, Genesis, and Mercedes-Benz applications.

The Iridium Long Life (SIP) line focuses on extended service life and consistent combustion performance for vehicles that call for a fine-wire iridium plug. This part number 3495 is a direct-fit style replacement for a wide range of late-model and earlier performance-oriented engines.

Key Features

• Iridium center electrode tip for precise spark delivery
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for efficient ignition
• Copper core center electrode and nickel ground core materials
• 5000 ohm resistance for OE-style ignition system compatibility
• 1.1 mm pre-gap size
• Flat seat design with 12.00 mm thread diameter and 26.50 mm reach
• Compatible with Hyundai Elantra, Kona, Santa Fe, Sonata, Tucson, and Kia Niro applications listed below

Detailed Description

Denso 3495 is engineered as an OE-style iridium spark plug for engines that require a fine-wire electrode and long service intervals. The iridium tip helps maintain a consistent spark kernel, while the platinum needle ground design supports durable electrode wear characteristics over time. With a copper core center electrode and nickel ground core, this plug is built to meet the demands of modern ignition systems without changing the original plug specification.

Fitment includes 2023 Hyundai Elantra, 2023 Hyundai Kona, 2023 Hyundai Santa Cruz, 2023 Hyundai Santa Fe, 2023 Hyundai Sonata, 2023 Hyundai Tucson, 2023 Kia Niro, 2017-2022 Genesis G90, 2021-2022 Hyundai Elantra, 2021-2022 Hyundai Kona, 2022 Hyundai Santa Cruz, 2021-2022 Hyundai Santa Fe, 2020-2022 Hyundai Sonata, 2022 Hyundai Tucson, 2017-2020 Genesis G80, 2015-2017 Kia K900, and multiple Mercedes-Benz V8 and AMG applications. This part cross-references DENSO Auto Parts FXU22HR11 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire codes related to plug wear or gap growth
• Reduced throttle response from weak spark delivery
• Service intervals shortened by conventional plug wear

Installation Notes and Tips

Verify the engine’s original spark plug specification before installation, including thread diameter, reach, seat type, and pre-gap. Use the listed fitment notes for your exact vehicle, such as Fits 2023 Hyundai Elantra, N/A, and Fits 2017-2022 Genesis G90, N/A. Inspect ignition coils and plug wells during service, and follow the vehicle manufacturer’s torque specification and service procedure.

Quality Assurance

Denso states this spark plug is manufactured to strict OE performance, durability, and emissions standards. The Iridium Long Life (SIP) design reflects Denso’s OE-focused approach for vehicles that require consistent ignition performance and long service life.