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Denso 3098 Spark Plug
| Brand | Denso 3098 |
|---|---|
| Center Electrode Core Material | Copper |
| Center Electrode Tip Material | Nickel |
| Ground Configuration | Standard |
| Ground Electrode Core Material | Nickel |
| Ground Electrode Quantity | 1 |
| Ground Electrode Tip Design | U-Groove |
| Hex Size | 20.6 |
| Manufacturer Heat Range | 22 |
| Pre-Gap Size | 0.8 |
| Reach | 19.00 |
| Resistance | 5000 |
| Seat Type | Flat |
| Thread Diameter | 14.00 |
| Product line | U-Groove Conventional |
| Fits | KTM, Suzuki, Yamaha, Kawasaki, Sea-Doo, Maserati, Honda, and Alfa Romeo · 5 vehicles |
U-Groove design. Improves ignitability for more efficient engine performance.
Copper core. Helps promote reliable spark delivery.
Conventional spark plug. A straightforward secondary ignition replacement.
Cross-references DENSO Auto Parts W22ESR-U for the same application. See all 1.
Denso 3098 Spark Plug Overview
The Denso 3098 is a U-Groove conventional spark plug built for direct ignition service in select Maserati applications. Its U-groove ground electrode design is engineered to improve ignitability, helping support more efficient combustion and consistent engine operation.
Compatible With 1989-1991 Maserati Spyder and 1989-1990 Maserati 430i, this spark plug is a fitment-specific replacement for secondary ignition maintenance. The Denso 3098 is also referenced as W22ESR-U for the same application.
Key Features
- U-Groove ground electrode tip design for improved ignitability
- Conventional spark plug construction for standard ignition service
- 5000 ohm resistance
- Nickel ground electrode tip material
- Copper center electrode core material
- Nickel center electrode tip material
- 0.8 pre-gap size
- 14.00 mm thread diameter with 19.00 mm reach
- Flat seat type with 20.6 mm hex size
- Manufacturer heat range 22
Product Details
Built under Denso’s U-Groove Conventional line, this spark plug focuses on dependable secondary ignition performance using a conventional design and a U-shaped ground electrode profile. That electrode shape helps expose the spark kernel more effectively, which can support cleaner combustion and smoother running in the specified Maserati Spyder and Maserati 430i applications. The Denso 3098 is a practical OE-style service part for owners maintaining original ignition specifications.
This part cross-references DENSO Auto Parts (e.g., W22ESR-U) for the same application.
What This Spark Plug Helps Address
- Hard starting caused by worn or fouled spark plugs
- Rough idle from inconsistent ignition firing
- Misfire conditions related to degraded secondary ignition components
- Reduced combustion efficiency from excessive electrode wear
- Loss of throttle response tied to weak spark delivery
Installation Notes and Tips
Verify thread diameter, reach, seat type, and heat range before installation. For the Denso 3098, confirm the application against your Maserati Spyder or Maserati 430i model year and inspect the ignition system for worn wires, coil issues, or carbon tracking before fitting new plugs. Set the gap to the specified 0.8 pre-gap only if your service procedure requires verification after handling.
Quality Assurance
Denso manufactures this spark plug as part of its U-Groove Conventional product line, using established ignition-component materials and specifications for consistent service in the listed applications.
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 1991 | Maserati | Spyder | N/A | U-Groove Conventional |
| 1990 | Maserati | 430i | N/A | U-Groove Conventional |
| 1990 | Maserati | Spyder | N/A | U-Groove Conventional |
| 1989 | Maserati | 430i | N/A | U-Groove Conventional |
| 1989 | Maserati | Spyder | N/A | U-Groove Conventional |
| No rows match your filter. | ||||