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NGK 5946 Spark Plug
| Brand | NGK 5946 |
|---|---|
| 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 | 14 |
| Insulator Height | 50.00 |
| Manufacturer Heat Range | 6 |
| Seat Type | Flat |
| Reach | 26.5 |
| Thread Diameter | 10.00 |
| Part Number | Lmar6a-9 |
| Stock Number | 5946 |
| Fits | — |
OE supplier heritage. Built by NGK, a long-time original equipment spark plug manufacturer.
Copper core. Promotes reliable ignition performance and consistent operation.
Standard spark plug. A direct-fit replacement for everyday engine maintenance.
Cross-references NGK 5946, 09482-00623 and 94701-00423 for the same application. See all 4.
NGK LMAR6A-9 Standard Spark Plug
NGK 5946 is a standard spark plug built for consistent ignition performance in a wide range of domestic and import applications. It uses a copper center electrode core with a nickel center tip and a nickel ground electrode tip for dependable spark delivery and stable operation.
As part of NGK’s Standard Spark Plug line, this plug reflects the brand’s OE-focused approach to ignition components. The LMAR6A-9 design features a 0.036 pre-gap, 5,000 ohm resistance, flat seat, 10.00 mm thread diameter, 26.5 reach, and 14 mm hex size for applications that call for these specifications.
Key Features
- NGK Standard Spark Plug, part number 5946
- LMAR6A-9 cross-reference identification
- Copper center electrode core with nickel tip material
- Nickel ground electrode tip and nickel ground core material
- 5,000 ohm resistance for ignition circuit control
- Pre-gapped to 0.036 for specified applications
- Flat seat design with 10.00 mm thread diameter and 26.5 reach
- 14 mm hex size and stud terminal type
Product Details
NGK manufactures ignition components with a long OE supply history, and this spark plug follows that engineering focus with materials and dimensions selected for reliable combustion support. The LMAR6A-9 configuration is suited to vehicles that specify a standard copper-core plug with nickel electrodes, including select Honda Civic and other make/model applications that call for NGK 5946. This part cross-references 09482-00623 and 94701-00423 for the same application.
Common Issues This Part May Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent spark delivery
- Misfire conditions related to degraded electrode wear
- Reduced throttle response from weak ignition performance
- Maintenance replacement for scheduled tune-up service
Installation Notes and Tips
Verify the required thread diameter, reach, seat type, and heat range before installation. Check the gap against the vehicle specification, confirm the terminal style matches the ignition lead or coil connection, and install to the manufacturer’s torque specification. For fitment-based searches, this part is commonly referenced for select Honda Civic applications and other vehicles that specify NGK 5946.
Quality Assurance
NGK is a major OE spark plug supplier in North America with extensive coverage across domestic and import vehicle applications. The brand’s manufacturing and distribution network supports consistent product availability and OE-oriented construction standards for ignition service.
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