Denso 5341 Spark Plug

Denso Iridium Power Spark Plug 5341

Denso Iridium Power spark plug 5341 is built for drivers who want precise ignition performance and stable combustion control. It uses a 0.4 mm iridium center electrode, a tapered seat, and a pre-gap of 0.8 mm to support consistent spark delivery in the ignition system.

The Iridium Power line focuses on compact electrode design and efficient spark exposure. For 2002-2004 Ford Focus applications, this plug is a direct-fit ignition service part that matches the specified thread diameter, reach, hex size, and heat range requirements.

Key Features

• Iridium center electrode tip for fine-wire spark delivery
• 0.4 mm center electrode design for concentrated ignition performance
• Tapercut and U-groove ground electrode tip design
• Nickel ground electrode core with copper center electrode core
• 5000 ohm resistor for ignition noise suppression
• Tapered seat, 14.00 mm thread diameter, and 25.00 mm reach
• 16.0 mm hex size and manufacturer heat range 24

Detailed Description

Denso 5341 is an Iridium Power spark plug engineered for secondary ignition service where precise electrode geometry matters. The iridium tip helps maintain a focused spark point, while the tapercut and U-groove ground design supports efficient flame initiation. With a 5000 ohm resistor and a 0.8 mm pre-gap, this plug is specified for controlled ignition performance and OE-style fitment in the listed Ford Focus applications. This part cross-references DENSO Auto Parts ITV24 for the same application.

Fits 2002-2004 Ford Focus, N/A. Fits 2002-2004 Ford Focus, N/A. Fits 2002-2004 Ford Focus, N/A.

What It Helps Address

• Misfires caused by worn or eroded spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Rough idle related to degraded ignition performance
• Reduced throttle response from inefficient combustion
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Verify the tapered seat, 14.00 mm thread diameter, 25.00 mm reach, and 16.0 mm hex size before installation. Confirm the gap specification against the vehicle service information and inspect coil and wire condition during spark plug service. For 2002-2004 Ford Focus applications, match the plug to the original heat range and thread specifications to maintain proper combustion chamber performance.

Quality Assurance

Denso Iridium Power plugs are built around fine-wire iridium electrode technology and application-specific dimensions for accurate fitment. Part number 5341 is listed for 2002-2004 Ford Focus applications and is supported by Denso interchange reference ITV24.