Bosch 9603 OE Fine Wire Double Iridium Spark Plugs – Pack of 4 | Easy Install, Long Life
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Description
xOverview
Bosch Automotive 9603 OE Fine Wire Double Iridium Spark Plugs are engineered to deliver a blend of high performance and extended life. The ultra-fine wire design combined with a laser welded tapered ground electrode helps maintain efficient flame-front propagation, while the iridium center electrode and iridium ground electrode inlay contribute to durability over many miles. They are OE-matched for compatibility with modern Gasoline Direct Injection (GDI) engines and are factory pre-gapped for straightforward installation. The nickel-plated rolled threads resist corrosion and require no anti-seize, enabling quick, clean mounting right out of the box.
Why choose Bosch Double Iridium
- 4X longer life versus standard copper plugs, thanks to iridium firing pins and low-wear electrodes
- 360-degree laser-welded ultra-fine wire iridium firing pin improves ignitability and can reduce ignition voltage by up to 24%
- Nickel-plated rolled threads resist corrosion and eliminate the need for anti-seize compound
- Factory pre-gapped so installation is simple and immediate
- OE-grade design that meets or exceeds requirements for modern gasoline engines, including GDI
Real-world use and installation
Out of the box, these plugs are ready to install, minimizing guesswork during maintenance. The precise fit helps maintain consistent combustion and smoother starts, while robust materials support durable performance under everyday driving conditions.
- Compatible with a broad range of vehicles across brands like Acura, Honda, Jaguar, Lexus, Lincoln, Mercedes-Benz, Mitsubishi, Nissan, Pontiac, Scion, Subaru, Suzuki, Toyota, and Volvo
- Including many popular models with GDI systems, where optimized spark position supports efficient fuel use and responsiveness
Installation tips and fitment
Verify fitment with your vehicle's specification guide or fit checker. Pre-gapped, corrosion-resistant threads simplify installation and reduce the time to complete a tune-up.
Unlock the potential in your engine with Bosch Double Iridium plugs, a choice that emphasizes reliability, efficiency, and long-term value.
FAQ
Q: What makes Bosch 9603 OE Fine Wire Double Iridium Spark Plugs different?
A: They use an ultra-fine iridium center and ground electrodes for durable ignition and long life, with factory pre-gap and nickel-plated threads for easy installation.
Q: Are these plugs compatible with modern GDI engines?
A: Yes. They meet OE design requirements for GDI engines and suit many brands; verify fitment with your vehicle’s specifications.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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