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NGK 4929 Spark Plug
| Brand | NGK 4929 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Stud |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .036 |
| Ground Electrode Quantity | 1 |
| Hex Size | 18 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 8 |
| Seat Type | Flat |
| Reach | .75 |
| Thread Diameter | 12.00 |
| Part Number | Dpr8ea-9 |
| Stock Number | 4929 |
| Fits | — |
OE supplier legacy. Built to original equipment standards for dependable performance.
Copper core design. Helps promote consistent ignition and reliable spark delivery.
Standard spark plug. A direct-fit ignition component for routine replacement.
Cross-references AMS Automotive 4096, AMS Automotive 4929 and Champion Spark Plug 809 for the same application. See all 15.
NGK DPR8EA-9 Standard Spark Plug
NGK 4929 is a standard spark plug built for dependable ignition performance in a wide range of domestic and import applications. With a copper center electrode core, nickel center and ground electrode tips, and a 5,000 ohm resistor, it is engineered for stable spark delivery and consistent operation.
As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s OE-focused approach to ignition components. The DPR8EA-9 design is a practical choice for routine service on vehicles such as Honda Civic and other applications that call for NGK 4929.
Key Features
- Part number: DPR8EA-9 / stock number 4929
- Standard spark plug design for everyday ignition service
- Copper center electrode core for efficient conductivity
- Nickel center and ground electrode tip materials
- 5,000 ohm resistor for ignition noise suppression
- Pre-gapped at .036 inch
- 12 mm thread diameter, .75 inch reach, flat seat
- 18 mm hex size and stud terminal type
- Heat range 8 for specified engine applications
Detailed Description
NGK 4929 is a standard replacement spark plug designed around OE-style construction and consistent serviceability. The copper core supports reliable heat transfer, while the nickel electrode materials help maintain stable firing characteristics under normal operating conditions. Its flat seat, 12 mm thread diameter, .75 inch reach, and .036 inch pre-gap make it a direct-spec component for engines that require this configuration.
For drivers searching for a spark plug for Honda Civic, or a replacement NGK DPR8EA-9 for other import and domestic vehicles, this part provides a straightforward service solution. This part cross-references Champion Spark Plug 809 for the same application.
Common Issues This Part Can Help Address
- Hard starting caused by worn spark plug electrodes
- Rough idle from inconsistent spark delivery
- Misfire conditions related to aged ignition components
- Reduced throttle response from degraded plug performance
- Service intervals due to fouled or worn plugs
Installation Notes and Tips
Verify the engine calls for NGK DPR8EA-9 / 4929 before installation. Confirm thread diameter, reach, seat type, heat range, and terminal style against the original plug specification. Check the gap before installation and follow the vehicle manufacturer’s torque specification to avoid thread or sealing damage. For best results, inspect ignition wires, coils, and related secondary ignition components during service.
Quality Assurance
NGK is a major OE spark plug supplier with long-standing manufacturing experience in ignition components for automotive, motorcycle, marine, and small engine applications. The Standard Spark Plug line is built to support original-equipment specifications and consistent operational performance across approved applications.
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