Denso 5392 Spark Plug

Denso Iridium Power Spark Plug 5392

Denso Iridium Power spark plug 5392 is built for drivers who want precise ignition performance from a compact, high-efficiency plug design. It uses a 0.4 mm iridium center electrode to promote strong spark concentration, along with a tapercut and U-groove ground electrode profile for consistent flame initiation.

Key Features

• Iridium center electrode tip material for durable spark delivery
• World’s smallest 0.4 mm iridium center electrode design
• Tapercut, U-groove ground electrode tip design
• Standard ground configuration with nickel ground electrode core
• Copper center electrode core for efficient heat transfer
• 5000 ohm resistance for ignition system compatibility
• Pre-gapped to 0.8 mm
• 14.00 mm thread diameter, 19.00 mm reach, flat seat, 20.6 mm hex size

Product Details

This Denso Iridium Power spark plug is engineered around a fine-wire iridium center electrode and a copper-core center design to support stable ignition performance under demanding operating conditions. The 27 heat range, flat seat, and standard ground configuration make part number 5392 a technical replacement choice for drivers searching for Denso spark plug 5392, Denso 5392, or Iridium Power ignition components for select applications. This part cross-references DENSO Auto Parts (e.g., IWM27) for the same application.

What It Helps Address

• Hard starting caused by worn or inefficient spark plugs
• Misfire conditions related to weak spark output
• Rough idle from inconsistent ignition performance
• Reduced throttle response from degraded plug electrodes
• Maintenance replacement needs for ignition service intervals

Installation Notes

Verify thread diameter, reach, seat type, and heat range before installation. Confirm the specified gap is correct for the application and inspect ignition coils, wires, and boots for wear before fitting the new plug. For vehicle-specific searches, this spark plug is commonly researched for Denso 5392 Honda Civic and Denso 5392 Toyota Corolla applications, so always match the exact engine requirements before installation.

Quality Assurance

Denso Iridium Power is the brand’s performance-focused spark plug line, centered on fine-wire iridium electrode technology for precise ignition characteristics. Part number 5392 is built to Denso’s dimensional and material specifications for consistent service in the intended application.