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Denso 3034 Spark Plug
| Brand | Denso 3034 |
|---|---|
| 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 | 0.7 |
| Ground Electrode Quantity | 1 |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 16 |
| Seat Type | Flat |
| Reach | 12.70 |
| Thread Diameter | 14.00 |
| Fits | — |
U-Groove design. Improves ignitability for more efficient engine performance.
Copper core. Helps promote consistent spark delivery.
Nickel electrodes. Built with nickel ground and center tips for dependable operation.
Cross-references DENSO Auto Parts W16FS-U for the same application. See all 1.
Denso 3034 U-Groove Spark Plug Overview
The Denso 3034 spark plug is a conventional ignition component built around a U-groove ground electrode design for improved ignitability and more consistent combustion. It is a practical choice for drivers searching for a Denso spark plug for Honda Civic, Toyota Corolla, and other applications that call for this style of secondary ignition part.
Key Features
- U-groove ground electrode tip design for stronger spark exposure
- Nickel ground electrode tip and nickel center electrode tip
- Copper center electrode core for stable conductivity
- Standard ground configuration with one ground electrode
- Pre-gapped to 0.7 mm
- 14.00 mm thread diameter, 12.70 mm reach, flat seat
- Manufacturer heat range 16
- Cross-reference: DENSO Auto Parts W16FS-U
Product Details
Built for secondary ignition service, the Denso 3034 uses a U-groove ground electrode to improve spark exposure at the plug gap, which supports more reliable ignition and efficient engine operation. The copper core and nickel electrode materials provide a conventional spark plug construction suited to everyday maintenance on vehicles that specify this plug type. For shoppers comparing Denso 3034, W16FS-U, and related ignition tune-up parts, this plug matches the core dimensions and seat style commonly required in import engine applications.
The Denso U-Groove Conventional line focuses on straightforward OE-style spark plug construction with the electrode geometry needed for dependable ignition performance. If you are replacing worn plugs on a Honda Civic, Toyota Corolla, or another vehicle that calls for this specification, the Denso 3034 offers a direct-fit maintenance option when the application matches the listed thread diameter, reach, seat type, and heat range.
Common Issues This Part Addresses
- Hard starting caused by worn or fouled spark plugs
- Rough idle from weak or inconsistent spark delivery
- Misfire symptoms tied to degraded electrode surfaces
- Reduced fuel efficiency from incomplete combustion
- Loss of throttle response from ignition wear
Installation Notes
Verify thread diameter, reach, seat type, heat range, and pre-gap before installation. The Denso 3034 is a 14.00 mm, flat-seat spark plug with a 12.70 mm reach and 0.7 mm pre-gap, so it should be matched to the engine specification before service. Use proper spark plug removal and installation procedures, and confirm the vehicle’s ignition system requirements for the exact application. For Honda Civic and Toyota Corolla service, always compare the existing plug number and engine callout before replacement.
Quality Assurance
Denso is known for OE-level ignition component engineering, and the U-Groove Conventional line is built around practical spark plug construction for routine engine service. Part number 3034 is also referenced as W16FS-U for cross-checking catalog listings and application lookup.
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