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NGK 4972 Spark Plug
| Brand | NGK 4972 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Non-removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 3/4 |
| Insulator Height | 37.00 |
| Manufacturer Heat Range | 6 |
| Seat Type | Flat |
| Reach | .375 |
| Thread Diameter | 14.00 |
| Resistor Type | Yes |
| Part Number | Bpmr6a solid |
| Stock Number | 4972 |
| Fits | — |
Standard spark plug. Copper core and nickel electrodes for reliable ignition performance.
Resistor type. Built with 5,000 ohms of resistance for cleaner electrical operation.
OE supplier heritage. Backed by NGK's original equipment standards and decades of expertise.
Cross-references AMS Automotive 4972, AMS Automotive 6023 and Anchor 2986 for the same application. See all 24.
NGK BPMR6A Solid Spark Plug
The NGK 4972 spark plug is built for dependable ignition performance in a wide range of small engine and powersports applications. As part of NGK’s Standard Spark Plug line, it uses a copper core center electrode, nickel tip materials, and a standard ground design to support consistent spark delivery and stable operation.
Compatible With applications that call for a flat-seat plug with a 14 mm thread diameter, .375 reach, 3/4 hex, and a .028 pre-gap. The resistor design and 5000 ohm resistance help control electrical noise in ignition systems that require a resistor plug.
Key Features
- NGK Standard Spark Plug line for OE-style replacement needs
- Part number 4972, also identified as BPMR6A SOLID
- Copper center electrode core with nickel tip material
- Standard ground electrode configuration with one ground electrode
- Resistor type plug with 5000 ohm resistance
- Flat seat design, 14 mm thread diameter, .375 reach
- Pre-gapped to .028 for applications that specify this setting
Product Details
NGK has decades of OE supply and manufacturing experience across automotive, motorcycle, marine, and small engine categories. The 4972 spark plug reflects that background with a practical electrode design, standard heat range 6, and a non-removable nut terminal for straightforward ignition connection. This plug is commonly searched as NGK 4972 spark plug, BPMR6A SOLID spark plug, and NGK Standard Spark Plug 4972 for service and replacement work.
This part cross-references Champion Spark Plug 863 for the same application.
Common Issues This Spark Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent ignition firing
- Misfire symptoms tied to weak spark output
- Excessive ignition noise in resistor-required systems
- Maintenance replacement for plugs with worn electrodes
Installation Notes and Tips
Verify the required thread diameter, reach, seat type, and heat range before installation. Check the gap against the engine specification, and confirm the terminal style matches the ignition lead or cap. For vehicle-specific searches, use terms such as NGK 4972 spark plug for Honda Civic, NGK 4972 spark plug for Toyota Corolla, or NGK BPMR6A SOLID replacement when matching the exact application callout.
Quality Assurance
NGK is a long-established OE supplier with broad coverage across domestic and import vehicle platforms, along with motorcycle, marine, and small engine applications. The brand’s manufacturing and distribution network supports consistent product availability and OE-level specification control.
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