Denso 3412 Spark Plug

Denso Iridium Long Life Spark Plug 3412

The Denso 3412 is an Iridium Long Life spark plug built for precise ignition performance and OE-level durability. It is a direct-fit ignition component for select Mazda 2 models from 2011-2014, with application-specific dimensions and materials that support stable combustion and emissions control.

Key Features

• Iridium center electrode tip for consistent spark performance
• Platinum chip ground electrode tip design for extended service life
• 5000 ohm resistor for ignition noise suppression
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode core with standard ground configuration
• Flat seat design, 14.00 mm thread diameter, 19.00 mm reach
• Pre-gapped to 1.1 mm
• Manufacturer heat range 16

Product Details

Denso Iridium Long Life spark plugs are engineered to meet strict OE performance, durability, and emissions standards. Part number 3412 uses an iridium center electrode tip and a platinum chip ground electrode tip to support reliable ignition under everyday driving conditions. This spark plug is a strong match for drivers searching for a Denso 3412 spark plug for Mazda 2 2011-2014 or an OE-style ignition replacement for select Mazda applications.

This part cross-references DENSO Auto Parts SK16PR-E11 and Mazda 0000-18-BP01 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition output
• Misfire conditions related to degraded spark plug performance
• Reduced fuel efficiency from incomplete combustion
• Emissions issues tied to weak or unstable spark delivery

Installation Notes and Tips

Verify thread diameter, reach, seat type, and heat range before installation. The Denso 3412 uses a 14.00 mm thread diameter, 19.00 mm reach, flat seat, and 16 mm hex size. Confirm the gap specification against the vehicle service information before installation, even though the plug is pre-gapped to 1.1 mm. For best results, install on a cool engine and torque to the manufacturer specification.

Fits 2011-2014 Mazda 2, N/A. This fitment also supports searches for Denso 3412 Mazda 2 spark plug replacement and Iridium Long Life spark plug for 2011-2014 Mazda 2.

Quality Assurance

Manufactured to meet strict OE performance, durability, and emissions standards for consistent service in the intended application.