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Denso 3312 Spark Plug
| Brand | Denso 3312 |
|---|---|
| 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 | 0.9 |
| Ground Electrode Quantity | 1 |
| Hex Size | 16.0 |
| Manufacturer Heat Range | 24 |
| Seat Type | Flat |
| Reach | 19.00 |
| Thread Diameter | 12.00 |
| Fits | — |
U-Groove design. Improves ignitability for more efficient engine performance.
Copper core. Helps promote consistent spark delivery and reliable combustion.
Conventional spark plug. A straightforward replacement for standard ignition service.
Cross-references DENSO Auto Parts XU24EPR-U for the same application. See all 1.
Denso 3312 U-Groove Spark Plug Overview
Denso 3312 is a conventional spark plug built for stable ignition performance in secondary ignition systems. Its U-Groove electrode design helps improve ignitability, supporting more efficient combustion in applications that call for a 12 mm, flat-seat plug with a 19.00 mm reach.
For drivers searching for a Denso spark plug 3312 replacement or a Denso U-Groove conventional spark plug for Honda Civic and Toyota Corolla service, this part combines a copper core center electrode with nickel tip materials and a 5000 ohm resistor for controlled spark delivery.
Key Features
- U-Groove ground electrode tip design for improved ignitability
- Conventional spark plug construction for secondary ignition service
- Copper core center electrode for consistent heat transfer
- Nickel center and ground electrode tip materials
- 5000 ohm resistance for resistor-style ignition systems
- Pre-gapped at 0.9 mm
- 12.00 mm thread diameter, 19.00 mm reach, and flat seat type
- 16.0 mm hex size for standard service tool access
Product Details
The Denso U-Groove Conventional line focuses on electrode geometry that supports reliable spark initiation without unnecessary complexity. Part number 3312 uses a single-ground-electrode layout with a nickel ground core and a copper-core center electrode, a combination commonly selected for dependable everyday ignition service. The manufacturer heat range is 24, and the plug is built to the listed dimensions for applications that specify this thread, reach, seat, and gap configuration. This Denso 3312 spark plug is a practical choice for routine ignition maintenance where correct specification matching matters.
This part cross-references DENSO Auto Parts (e.g., XU24EPR-U) for the same application.
Common Issues This Part Can Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent spark delivery
- Misfire symptoms related to degraded plug electrodes
- Reduced fuel efficiency from weak ignition performance
- Loss of throttle response in aging ignition systems
Installation Notes and Tips
Verify thread diameter, reach, seat type, and heat range against the vehicle specification before installation. Use the listed 0.9 mm pre-gap as the starting point and confirm the gap matches the engine requirement. Clean the plug seat area, inspect ignition wires or coils, and torque to the vehicle manufacturer’s specification to avoid thread or sealing damage. For fitment-based searches, this spark plug is the type of part used in Honda Civic and Toyota Corolla maintenance when the engine calls for the listed dimensions.
Quality Assurance
Denso manufactures this plug as part of its U-Groove Conventional spark plug line, using a design centered on improved ignitability and efficient combustion support. Part number 3312 is built to the stated OE-style dimensions and materials for consistent service replacement.
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