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⚡ Ignite your drive with Bosch’s double iridium spark—where power meets precision!
The Bosch 9603 OE Fine Wire Double Iridium Spark Plug features double iridium electrodes for 4X longer life, a 0.6mm ultra-fine wire firing pin for superior ignitability, and a 360° laser weld for enhanced durability. Factory pre-gapped and nickel-plated for easy installation, it’s engineered to optimize performance in modern GDI engines, making it a premium upgrade for lasting engine efficiency.
| ASIN | B00515NH4K |
| Automotive Fit Type | Vehicle Specific Fit |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car |
| Core Material | Iridium |
| Core material | Iridium |
| Customer Reviews | 4.6 out of 5 stars 831 Reviews |
| Global Trade Identification Number | 00028851010375 |
| Item Weight | 23 g |
| Manufacturer | Bosch |
| Manufacturer Part Number | 9603 |
| Model Number | 9603_1 |
| OEM Equivalent Part Number | 9603 |
| Thread Size | 1.25mm |
| Thread size | 1.25mm |
| Top Material Type | Nickel |
| Top material type | Nickel |
| UPC | 028851010375 |
| Unit Count | 1.0 count |
| Vehicle service type | Car |
A**R
Run great
Toyota Sienna 2006
B**D
Very nice
Nice product
C**A
Reliable Bosch Spark Plugs
High-quality spark plugs that fit perfectly and work as expected. Engine runs smoother and starts easily. Durable and dependable — Bosch never disappoints. Great value for maintenance or replacement!
S**N
Solid, reliable park plugs
I got these for my 2002 GS430 and boy do they help get all the power out of my engine. I have an exhaust leak and trans leak that leads to a laggy bogged down performance, but by swapping out with these plugs yearly I can keep the power more responsive. I tried other plugs, but these seem to do the best for me in my case. Installation was straight forward and these tightened in place great with a little bit of antiseize.
S**K
Ok
Ok
Trustpilot
1 week ago
1 week ago