Champion 3405 Spark Plug - Exhaust Side

Champion Platinum Power Spark Plug 3405

Champion Platinum Power 3405 is a resistor spark plug built for stable ignition performance across a wide range of older import and domestic applications. It uses a platinum center electrode, nickel-based ground electrode materials, and Champion’s Heat-Active alloy design to help deliver a focused spark.

Compatible With many vehicles from 1960 through 2006, including applications such as Kia Magentis, Toyota Pickup, and Dodge Caravan, this plug is specified by plug type RN14PMC in numerous fitments.

Key Features

• Champion Platinum Power line for OE-style ignition service
• Platinum center electrode tip for durable spark delivery
• Fine-wire center electrode diameter of 0.078 inch
• Nickel ground electrode core with nickel copper alloy ground electrode material
• Pre-gapped to 0.035 inch / 0.89 mm
• Flat seat design with 0.75 inch reach and 14 mm thread diameter
• Resistor-type construction for ignition noise control
• Non-removable nut terminal and 20.650 mm hex size

Platinum Power Line Details

Champion Platinum Power spark plugs are positioned for drivers and technicians who need consistent ignition service in a broad range of legacy vehicles. The Heat-Active alloy construction is paired with a fine-wire center electrode and V-trimmed ground electrode to sharpen spark focus and support reliable combustion in everyday driving.

Detailed Description

Champion 3405 is a platinum spark plug with a flat seat, 0.75 inch reach, and 14 mm thread diameter. The 0.035 inch pre-gap, resistor design, and RN14PMC plug type make it a direct-service option for many older Chrysler, Dodge, Jeep, Toyota, Mazda, BMW, and Volkswagen applications. This part cross-references Autolite AP65 and Walker Exhaust 41828 for the same application.

Fitment examples include Fits 2001-2006 Kia Magentis, Fits 1984-1995 Dodge Caravan, and Fits 1975-1995 Toyota Pickup. It also appears in applications for Kia Sephia, Mitsubishi Mirage, Hyundai Sonata, Geo Tracker, and Pontiac Sunbird, along with many classic truck and passenger car platforms.

What It Helps Address

• Hard starting caused by worn or inconsistent spark plugs
• Rough idle from degraded ignition performance
• Misfire complaints related to plug wear or incorrect heat range selection
• Reduced throttle response from weak spark delivery
• Service intervals where a platinum plug is specified for replacement

Installation Notes and Tips

Verify plug type RN14PMC, seat style, thread diameter, reach, and heat range before installation. Confirm the required gap for the specific vehicle application, since some listed fitments call for a different gap than the 0.035 inch pre-gap supplied on this plug. Use the vehicle service specification for torque and final gap verification.

Body fitment examples include Fits 1990-1998 Hyundai Sonata, Fits 1992-1996 Volkswagen EuroVan, Fits 1989-1995 Suzuki Sidekick, and Fits 1984-1995 Dodge Caravan. Additional applications span BMW 325i, Toyota 4Runner, and Chrysler LeBaron.

Quality Assurance

Champion manufactures this Platinum Power spark plug with a platinum center electrode, nickel-based ground electrode construction, and resistor design for consistent secondary ignition service. The part number 3405 is built to the listed physical specifications and fitment references shown above.