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Denso 5379 Spark Plug
| Brand | Denso 5379 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Tapercut, u-groove |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Iridium |
| Pre-Gap Size | 0.8 |
| Ground Electrode Quantity | 1 |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 22 |
| Seat Type | Flat |
| Reach | 12.70 |
| Thread Diameter | 14.00 |
| Fits | — |
Iridium Power. Features Denso's smallest iridium center electrode for increased performance.
Tapercut, U-Groove. Ground electrode design helps promote efficient spark delivery.
Copper core. Center electrode core material supports consistent ignition performance.
Cross-references DENSO Auto Parts IWF22 for the same application. See all 1.
Denso Iridium Power Spark Plug 5379
Denso Iridium Power spark plug 5379 is built for drivers who want precise ignition performance from a compact iridium design. With a 0.4 mm iridium center electrode, 5000 ohm resistance, and a 0.8 mm pre-gap, this plug supports consistent spark delivery in applications that call for a 14.00 mm thread diameter, 12.70 mm reach, and flat seat.
The Iridium Power line focuses on fine-wire electrode construction for efficient ignition response. For shoppers searching for Denso spark plug 5379, Denso IWF22, or an Iridium Power spark plug for Honda Civic and similar applications, this part is built around OE-style dimensions and a performance-oriented electrode layout.
- Iridium center electrode tip with a 0.4 mm fine-wire design
- Tapercut and U-groove ground electrode tip design
- 5000 ohm resistor for ignition system noise control
- Copper core center electrode and nickel ground electrode core
- 14.00 mm thread diameter, 12.70 mm reach, flat seat
- Manufacturer heat range 22 with 20.6 mm hex size
- Cross-reference: DENSO Auto Parts IWF22
Detailed Application Overview
This spark plug is intended for ignition systems that require a 14 mm, flat-seat plug with a 12.70 mm reach and a 20.6 mm hex. The iridium tip and tapercut U-groove ground design help support stable combustion characteristics in engines that use this specification, including select Honda Civic applications and other vehicles that match the same OE dimensions. If you are replacing a worn Denso spark plug 5379 or matching the Denso IWF22 reference, this part provides the correct secondary ignition format for those applications.
Common Issues This Part Can Address
- Hard starting caused by worn spark plug electrodes
- Misfire conditions from excessive plug wear
- Rough idle related to inconsistent spark delivery
- Reduced throttle response from degraded ignition performance
- Ignition noise concerns in resistor-equipped systems
Installation Notes and Tips
Verify thread diameter, reach, seat type, and heat range before installation. Check the gap specification against the engine requirement and confirm the ignition system is in good condition before fitting the plug. Use the vehicle service manual for torque specifications and inspect the coil, boots, and plug wells during replacement. For fitment-based searches, confirm the exact engine application for Honda Civic and other vehicles listed by the catalog before ordering.
Quality Assurance
Denso manufactures the Iridium Power line with fine-wire iridium electrode construction and OE-style dimensional accuracy. Part number 5379 is engineered to meet the listed specifications for the intended ignition application.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||