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Denso 3256 Spark Plug
| Brand | Denso 3256 |
|---|---|
| Resistance | 5000 |
| Ground Electrode Tip Design | U-groove |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Pre-Gap Size | 0.8 |
| Ground Electrode Quantity | 1 |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 16 |
| Seat Type | Flat |
| Reach | 19.00 |
| Thread Diameter | 14.00 |
| Fits | — |
U-Groove design. Improves ignitability for more efficient engine performance.
Copper core. Helps promote reliable spark delivery and consistent combustion.
Nickel tips. Durable electrode materials support steady ignition performance.
Cross-references BMW 12 12 9 061 383, BMW 12 12 9 061 445 and BMW 12 12 9 061 869 for the same application. See all 4.
Denso 3256 U-Groove Spark Plug
Denso 3256 is a conventional spark plug built around a U-groove ground electrode design for stronger ignitability and more consistent combustion. It is a practical OE-style choice for BMW ignition service and other applications that call for this specification.
Key Features
- U-groove ground electrode tip design for improved spark exposure
- Nickel ground electrode tip and nickel center electrode tip
- Copper center electrode core for stable heat transfer
- 5000 ohm resistor for ignition noise suppression
- Standard ground configuration with a single ground electrode
- 14.00 mm thread diameter, 19.00 mm reach, and flat seat
- Manufacturer heat range 16 with 0.8 pre-gap size
Product Details
This Denso U-Groove Conventional spark plug is engineered to improve ignitability by exposing the spark more effectively at the electrode gap. The copper-core center electrode helps manage heat, while the nickel electrode materials support dependable wear characteristics in everyday ignition service. Part number 3256 is also referenced as Denso J16CR-U and cross-references BMW OE numbers 12 12 9 061 383 and 12 12 9 061 445 for the same application.
For BMW ignition maintenance, Denso 3256 is a direct-fit style spark plug for vehicles that specify this plug design and heat range. It is suited for drivers searching for BMW spark plug replacement, Denso 3256 spark plug, or J16CR-U equivalent service parts.
What It Helps Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from weak or inconsistent spark delivery
- Misfire symptoms related to degraded ignition performance
- Reduced fuel efficiency from incomplete combustion
- Ignition noise concerns in resistor-equipped systems
Installation Notes and Tips
Verify the required thread diameter, reach, seat type, heat range, and pre-gap before installation. Use the specified torque procedure for the engine, and inspect ignition wires or coils at the same time to avoid repeat misfire complaints. For BMW applications, confirm the OE part number or service specification before ordering.
Quality Assurance
Denso manufactures this spark plug as part of its U-Groove Conventional line, a product family focused on reliable ignition performance and efficient combustion characteristics. Confirm vehicle application by OE reference or service data before installation.
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