



⚡ Spark your drive with Bosch’s double iridium power — because your engine deserves the best!
The BOSCH9603 OE Fine Wire Double Iridium Spark Plug features a 360-degree laser-welded ultra-fine iridium firing pin and ground electrode, delivering 4X longer life and up to 24% reduced voltage requirements compared to standard plugs. Its nickel-plated rolled threads resist corrosion and require no anti-seize, while factory pre-gapping ensures easy installation. Designed to meet or exceed OEM standards, it fits a wide range of modern gasoline engines, including Gasoline Direct Injection models.




| Brand | Bosch |
| Core Material | Iridium |
| Thread Size | 1.25mm |
| Top Material Type | Nickel |
| Vehicle Service Type | Car |
| Global Trade Identification Number | 00028851010375 |
| Automotive Fit Type | Vehicle Specific Fit |
| UPC | 028851010375 |
| OEM Part Number | 9603 |
| Manufacturer | Bosch Automotive |
| Model | Spark Plug |
| Item Weight | 0.8 ounces |
| Product Dimensions | 4 x 7 x 9 inches |
| Country of Origin | Germany |
| Item model number | 9603_1 |
| Exterior | Machined |
| Manufacturer Part Number | 9603 |
| Position | Rear, Front |
Trustpilot
1 day ago
2 months ago