Denso 3502 Spark Plug

Denso Iridium Long Life Spark Plug 3502

Denso Iridium Long Life spark plug 3502 is built for OE-level performance, durability, and emissions control. It uses an iridium center electrode with a platinum chip ground tip to support stable ignition and consistent combustion in modern Honda, Jaguar, and Land Rover engines.

The Iridium Long Life line focuses on extended service life and precise spark delivery. For drivers searching for a Denso 3502 spark plug for a Honda Civic, Honda CR-V, or Land Rover Range Rover Velar, this OE-recommended design matches the demands of late-model secondary ignition systems.

Key Features

• Iridium center electrode tip material for fine-wire spark performance
• Platinum chip ground electrode tip design for durability
• OE-style flat seat construction
• Pre-gap size: 0.8 mm
• Resistance: 5000 ohms
• Copper center electrode core and nickel ground electrode core
• Thread diameter: 12.00 mm; reach: 26.50 mm; hex size: 14.3 mm
• Manufactured to strict OE performance, durability, and emissions standards

Product Details

Denso 3502 is an Iridium Long Life spark plug engineered for precise ignition timing and dependable operation in vehicles that specify this plug style. The iridium center electrode helps maintain a consistent spark under demanding conditions, while the platinum chip ground design supports long service intervals and stable wear characteristics. This part cross-references Denso Auto Parts SXE24HCR8S and Honda 12290-59B-003 for the same application.

Compatible With 2017-2021 Honda Civic, 2017-2021 Honda CR-V, 2018-2022 Jaguar E-Pace, 2018-2022 Jaguar F-Pace, 2018-2021 Jaguar F-Type, 2018-2020 Jaguar XE, 2020-2022 Land Rover Defender 110, 2021-2022 Land Rover Defender 90, 2021-2022 Land Rover Discovery, 2018-2022 Land Rover Discovery Sport, 2020-2022 Land Rover Range Rover, 2018-2022 Land Rover Range Rover Evoque, 2019-2022 Land Rover Range Rover Sport, and 2018-2022 Land Rover Range Rover Velar. It also fits 2023 Honda Civic, 2022 Honda CR-V, 2023 Jaguar E-Pace, 2023 Jaguar F-Pace, 2023 Land Rover Defender 110, 2023 Land Rover Defender 130, 2023 Land Rover Defender 90, 2023 Land Rover Discovery, 2023 Land Rover Discovery Sport, 2023 Land Rover Range Rover, 2023 Land Rover Range Rover Evoque, 2023 Land Rover Range Rover Sport, and 2023 Land Rover Range Rover Velar.

Common Uses

• Engine misfire diagnosis tied to worn spark plugs
• Hard starting caused by weak ignition output
• Rough idle from degraded spark consistency
• Reduced fuel economy related to worn secondary ignition components
• Maintenance replacement for OE-specified iridium plugs

Installation Notes

Verify thread diameter, reach, seat type, and pre-gap before installation. Use the vehicle service specification for torque and gap verification, and inspect ignition coils and boots during spark plug service. For Honda Civic, Honda CR-V, and Land Rover Range Rover Velar applications, confirm engine code and OE part number match before ordering.

Quality Assurance

Denso manufactures this spark plug to OE performance, durability, and emissions standards. The Iridium Long Life design is intended to deliver consistent ignition characteristics in the applications listed above.