



⚡ Spark your drive with Bosch’s double iridium power—because every mile counts!
The BOSCH 9603 OE Fine Wire Double Iridium Spark Plug combines advanced 360-degree laser-welded iridium technology with nickel-plated corrosion-resistant threads, delivering up to 4X longer life and 24% reduced voltage requirements. Factory pre-gapped and engineered for OE fit, it ensures superior ignitability and durability across a broad spectrum of modern gasoline engines, including GDI models, making it the ultimate upgrade for performance-driven drivers.




| 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 |
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