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NGK 4522 Spark Plug
| Brand | NGK 4522 |
|---|---|
| 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 | 9 |
| Seat Type | Flat |
| Reach | .5 |
| Thread Diameter | 14.00 |
| Part Number | Br9hs |
| Stock Number | 4522 |
| Fits | — |
OE supplier heritage. Built by NGK, a long-time original equipment spark plug manufacturer.
Copper core design. Helps promote reliable ignition performance and consistent operation.
Standard spark plug. A direct-fit ignition component for broad automotive, motorcycle, marine, and small engine use.
Cross-references AMS Automotive 4522, Autolite 4054 and 90890-78077 for the same application. See all 10.
NGK BR9HS Standard Spark Plug
The NGK BR9HS standard spark plug is built for reliable ignition performance in a wide range of small-engine and powersports applications. As part of NGK’s Standard Spark Plug line, this plug uses a copper center electrode core, nickel center and ground electrode tips, and a 5,000-ohm resistor for stable operation.
Part number 4522 is a direct-reference spark plug for buyers searching for NGK BR9HS, NGK 4522, or an OE-style replacement spark plug with a flat seat and 14 mm thread diameter.
Key Features
- NGK Standard Spark Plug line for OE-style ignition service
- Part number 4522 / BR9HS
- 5,000-ohm resistor for reduced electrical noise
- Copper center electrode core for dependable heat transfer
- Nickel center and ground electrode tip materials
- Standard ground electrode design with one ground electrode
- Pre-gapped at .028 inch
- Flat seat, 14 mm thread diameter, .5 inch reach
- 13/16 inch hex size with removable nut terminal
Product Details
NGK builds this spark plug to meet original equipment standards for durability and consistent performance. The BR9HS features a heat range of 9, a standard ground configuration, and a nickel ground electrode core, making it a practical choice for ignition service where correct heat range and stable spark delivery matter. If you are searching for NGK BR9HS 4522 for motorcycle, marine, or small engine maintenance, this plug provides the core specifications needed for a proper replacement.
NGK’s long OE supply history and North American manufacturing and distribution network support consistent product availability and specification control. This part cross-references AMS Automotive 4522 for the same application.
Common Issues This Spark Plug Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from weak or inconsistent spark delivery
- Misfire symptoms related to aged ignition components
- Reduced throttle response from degraded plug performance
- Ignition noise concerns where a resistor plug is specified
Installation Notes and Tips
Verify the BR9HS specification, thread diameter, reach, seat type, and heat range before installation. Check the gap against the engine manufacturer’s specification, even though this plug is pre-gapped at .028 inch. Use the removable nut terminal only as required by the ignition lead or cap design, and confirm the plug seats correctly on the flat seat surface.
For vehicle-specific searches, shoppers often look for NGK BR9HS applications on motorcycle and small-engine platforms, including Honda and Yamaha models. Always match the engine’s required plug code before installation.
Quality Assurance
NGK is a major OE spark plug supplier with decades of automotive experience and a reputation built around original equipment standards. The BR9HS 4522 is manufactured to support consistent ignition performance and dependable service life when installed in the correct application.
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