Copper V-Groove Ground Electrode Spark Plugs Designed for Reliable Daily Performance
The NGK ZFR5N is a V-Power copper spark plug built for high-volume daily driving applications where consistent ignition performance and easy serviceability matter. The V-groove cut into the ground electrode of NGK3459 concentrates the spark at a fixed focal point, reducing required firing voltage and maintaining stable combustion across varying RPM ranges. Each box contains four plugs for a complete 4-cylinder service.
Key Features
- V-groove ground electrode focuses spark discharge for lower required firing voltage
- Copper core center electrode transfers heat efficiently for reliable thermal management
- Ribbed insulator design prevents flashover and voltage leakage
- Triple-sealing on the center electrode prevents combustion gas leakage
- Trivalent metal plating on shell resists corrosion and eases removal
- Multi-ground straps on select configurations improve spark exposure to the air-fuel mixture
- Box of 4 plugs covers a full replacement on most 4-cylinder engines
Specifications
| Detail | Value |
|---|---|
| Part Number (MPN) | ZFR5N / NGK3459 |
| Plug Type | V-Power Copper |
| Electrode Design | V-groove ground electrode |
| Core Material | Copper |
| Heat Range | 5 |
| Thread Size | 12 mm |
| Resistor | Yes |
| Quantity | 4 plugs per box |
| UPC | 087295734592 |
What’s Included
- 4x NGK ZFR5N V-Power Spark Plugs
About NGK
NGK Spark Plugs has been producing ignition components since 1936 and holds OEM supplier status with virtually every major automaker worldwide. Their V-Power line is engineered for accessible, reliable ignition performance using a patented V-groove ground electrode design that concentrates the spark arc and reduces misfires without the premium cost of iridium or platinum constructions.
Frequently Asked Questions
What vehicles use the NGK ZFR5N spark plug?
The ZFR5N fits a range of import and domestic vehicles requiring a 12 mm thread plug at heat range 5. Cross-reference your OEM plug number or look up your year, make, model, and engine against NGK3459 in the NGK fitment catalog to confirm compatibility before ordering.
What is the V-groove ground electrode on the NGK ZFR5N?
The V-groove is a precision-cut notch in the ground electrode that focuses the spark arc at a specific point along the electrode face. This reduces the voltage required to fire the plug, shortens flame kernel travel, and improves combustion efficiency compared to a standard flat-face ground electrode.
Does the NGK ZFR5N require gapping before installation?
The NGK3459 ships from the factory with a pre-set gap. Always verify the gap against your vehicle’s specification using a feeler gauge before installation, as some applications may call for a different setting than the default.
How often should I replace NGK ZFR5N V-Power spark plugs?
NGK copper V-Power plugs are designed for approximately 20,000 to 30,000 mile service intervals. Always follow your vehicle manufacturer’s recommended replacement schedule, as factors like oil consumption and fuel quality can shorten plug life.
Can I use the ZFR5N in a high-performance engine build?
The ZFR5N is optimized for naturally aspirated daily-driver applications. For heavily modified, turbocharged, or race-spec engines, consult your tuner for the appropriate heat range. A plug that is too hot for a boosted application risks detonation.
How many plugs do I need for my engine?
One box of NGK3459 contains 4 plugs. A 4-cylinder engine requires 4 plugs for a complete service. A 6-cylinder requires 6 plugs and a V8 requires 8 plugs, so order accordingly for your engine configuration.
Is the NGK ZFR5N the same as NGK part number 3459?
Yes. ZFR5N is the alphanumeric designation for the heat range and electrode configuration, while NGK3459 is the numeric catalog reference. Both refer to the identical plug and can be used interchangeably when searching or cross-referencing.
Will the NGK ZFR5N help fix a misfire or rough idle?
If worn or fouled plugs are the root cause of a misfire or rough idle, replacing them with fresh NGK3459 V-Power plugs can restore correct combustion. Always diagnose the underlying cause before replacing plugs, as misfires can also result from ignition coil, fuel injector, or compression issues.
Installation Instructions
- Let the engine cool fully before removing plugs to protect aluminum cylinder head threads.
- Disconnect the coil-on-plug or spark plug wire from each cylinder before removal.
- Remove the old plug with a spark plug socket, turning counterclockwise.
- Verify the gap on each NGK ZFR5N against your vehicle specification using a feeler gauge.
- Thread the plug in by hand to avoid cross-threading, then torque to specification.
- Reconnect ignition coils or wires and repeat for all cylinders.
- Start the engine and confirm smooth idle with no misfire codes.
WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.
