



⚡ Spark your engine’s potential with Bosch Double Iridium – performance that lasts and impresses!
Bosch 9603 OE Double Iridium Spark Plug features ultra-fine iridium firing pin and ground electrode for 4X longer life and 24% reduced voltage requirements. Pre-gapped and nickel-plated for corrosion resistance and easy installation, it meets OE standards for modern gasoline engines including GDI. Compatible with a broad range of premium vehicles, it ensures reliable, high-performance ignition and smoother engine operation.




| ASIN | B00515NH4K |
| Best Sellers Rank | #547,063 in Automotive ( See Top 100 in Automotive ) #3,082 in Automotive Replacement Spark Plugs |
| Brand | Bosch |
| Brand Name | Bosch |
| Compatible with Vehicle Type | Car |
| Core Material | Iridium |
| Customer Reviews | 4.6 out of 5 stars 877 Reviews |
| Global Trade Identification Number | 00028851010375 |
| Included Components | spark plug |
| Item Type Name | Spark Plug |
| Item Weight | 0.05 Pounds |
| Manufacturer | Bosch Automotive |
| Manufacturer Part Number | 9603 |
| Manufacturer Warranty Description | Limited |
| Thread Size | 1.25mm |
| Top Material Type | Nickel |
| UPC | 028851010375 |
| Unit Count | 1 Count |
| Vehicle Service Type | Car |
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.
Q**Q
Good performance and better gas mileage.
The plugs I received were made in Germany. The plugs are almost half the cost of Denso and they perform just as well. I would recommend these plugs.
L**.
Great Product
Purchased this product for my 2004 Toyota Tundra and so far it is doing the job as intended. My truck now accelerate as it should without any hesitation. It arrived well packaged and gapped. A great replacement at a great price!
L**A
Excelente
Justo lo que pedi
J**H
good item
i bought 4 sparks for my friends,because he is not the amazon prime membership,he said it is well for his Camry and more powerfull,just a little expensive. Last year i bought 6 sparks and just costed 23
A**R
Worth the money
My 2004 Toyota Highlander runs smoother and is a good pick-up. So far so good. Best spark plugs ever bought.
F**N
Great
Thank You
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