/live/media/NG/NG_4122_Fro.jpg)
NGK 4122 Spark Plug
| Brand | NGK 4122 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | Standard |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Electrical Terminal Type | Removable nut |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | .028 |
| Ground Electrode Quantity | 1 |
| Hex Size | 13/16 |
| Insulator Height | 55.00 |
| Manufacturer Heat Range | 7 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 14.00 |
| Part Number | Br7hs |
| Stock Number | 4122 |
| Fits | — |
OE supplier heritage. Built by NGK, a long-time spark plug maker with original equipment standards.
Copper core design. Helps promote reliable ignition performance and consistent operation.
Standard spark plug. A straightforward replacement for common ignition service.
Cross-references AMS Automotive 4024, AMS Automotive 4122 and BENDIX PREMIUM BRAKE SHOES 874 for the same application. See all 44.
NGK BR7HS Standard Spark Plug
The NGK BR7HS standard spark plug is built for reliable ignition performance in a wide range of domestic and import applications. As part of NGK’s Standard Spark Plug line, this plug uses a copper core center electrode, nickel tip materials, and a standard ground electrode design to support consistent spark delivery and stable engine operation.
Compatible With select motorcycle, marine, and small engine applications, the BR7HS is a practical OE-style replacement for maintenance and tune-up service. It is also a common search match for Honda and Yamaha ignition service needs, including BR7HS part number 4122 replacement searches.
Key Features
- NGK Standard Spark Plug line for OE-style service replacement
- Copper core center electrode for dependable heat transfer
- Nickel center and ground electrode tip materials
- Standard ground configuration with one ground electrode
- 5,000 ohm resistance for ignition system noise suppression
- Pre-gapped to .028 for common small-engine and powersports applications
- 14 mm thread diameter, .5 reach, and flat seat design
- 13/16 hex size with removable nut terminal
- Manufacturer heat range 7
Product Details
NGK has long supplied original equipment spark plugs for domestic and import vehicles in North America, and the BR7HS reflects that OE-focused approach. The copper core construction helps manage combustion heat, while the nickel electrode design supports steady firing characteristics under normal operating conditions. For buyers searching spark plug 4122, NGK BR7HS, or BR7HS replacement options, this plug offers a straightforward match for maintenance on engines that call for this specification.
This part cross-references FEL-PRO 422 and OSC 3684 for the same application. Search terms such as Honda spark plug BR7HS and Yamaha BR7HS spark plug are commonly used when sourcing this part number 4122.
Common Issues This Spark Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent spark delivery
- Misfire symptoms related to aged ignition components
- Reduced throttle response from degraded plug performance
- Maintenance replacement for tune-up intervals
Installation Notes and Tips
Verify the engine calls for NGK BR7HS before installation. Confirm thread diameter, reach, seat type, and heat range against the original plug specification, especially on Honda and Yamaha applications where BR7HS searches are common. Check and adjust the gap only if the engine specification requires it, and inspect the ignition lead or coil terminal connection before tightening the plug to the proper torque.
Quality Assurance
NGK is a major OE spark plug supplier with decades of automotive and powersports manufacturing experience. The BR7HS is produced to support original-equipment standards for durability and consistent ignition performance across the applications it was engineered for.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| No rows match your filter. | ||||