Denso 3500 Spark Plug

Reliable Ignition Performance for Honda, Jaguar, and Land Rover Vehicles

The Denso Iridium Long Life (SIP) spark plug, part number 3500, is engineered to deliver consistent ignition performance for a range of vehicles including Honda Accord, Jaguar F-Type, and Land Rover Defender models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Iridium center electrode tip for enhanced durability and stable ignition
• Platinum needle ground electrode tip with needle-to-needle configuration
• Copper core center electrode for optimal conductivity
• Flat seat type with 26.50 mm reach and 12.00 mm thread diameter
• Pre-gap size of 1.1 mm for precise spark gap
• Heat range 22 suitable for a variety of engine conditions
• Hex size 14.3 mm for standard installation tools

Advanced Design Features of the Denso Iridium Long Life (SIP) Spark Plug

The Iridium Long Life (SIP) product line from Denso focuses on extending spark plug service life while maintaining reliable ignition performance. This spark plug incorporates an iridium center electrode tip, known for its high melting point and wear resistance, paired with a platinum needle ground electrode tip arranged in a needle-to-needle configuration. The copper core center electrode enhances electrical conductivity, promoting efficient spark generation. The nickel ground electrode core material adds durability, while the flat seat design ensures proper sealing in compatible engines. With a manufacturer heat range of 22 and a pre-gap size of 1.1 mm, this spark plug is optimized for stable combustion and reduced misfires.

Technical Specifications and Compatibility

This Denso spark plug is compatible with various Honda, Jaguar, and Land Rover models, including the Honda Accord and Fit, Jaguar F-Type, XE, XF, and XJ, as well as Land Rover Defender 90, Defender 110, Discovery, LR4, Range Rover, Range Rover Sport, and Range Rover Velar. The part number 3500 identifies this specific configuration, ensuring correct fitment and performance for these vehicles.

Common Applications and Issues Addressed

• Improves ignition reliability in Honda Accord and Land Rover Defender engines
• Reduces misfires and rough idling in Jaguar F-Type and Range Rover models
• Supports efficient fuel combustion for better engine responsiveness
• Helps maintain consistent spark under varied driving conditions
• Addresses wear-related ignition problems in high-mileage vehicles

Installation Notes and Tips

When installing the Denso Iridium Long Life (SIP) spark plug 3500, ensure the spark plug gap is set to the specified 1.1 mm pre-gap size if adjustment is necessary. Use a 14.3 mm socket for proper torque application to avoid damage to the flat seat and threads. Verify compatibility with your vehicle’s engine specifications, particularly the heat range 22 rating, to ensure optimal performance. It is recommended to replace spark plugs in sets to maintain balanced engine operation.

Quality Assurance and Warranty

Denso manufactures this spark plug to meet strict quality standards, utilizing premium materials such as iridium and platinum for durability and performance. While specific warranty details are not provided here, Denso products typically come with manufacturer-backed quality assurance to support reliable operation in compatible Honda, Jaguar, and Land Rover vehicles.