Bosch 9673 OE Fine Wire Double Iridium Spark Plugs – Pack of 4

Engineered for performance and durability

In a landscape of modern engines, Bosch delivers with the 9673 pack of four. These are fine-wire, double iridium plugs designed to meet the needs of Gasoline Direct Injection (GDI) powertrains while delivering a refined driving feel and long service life. The combination of an ultra-fine wire firing pin and an iridium ground electrode is built for consistent ignition across a wide range of temperatures and loads, helping to keep your engine reacting smoothly and efficiently.

From the moment you open the box, you’ll notice the attention to detail: laser-welded connections, a precise gap, and a construction that resists wear under demanding conditions. This design aims to support reliable starts, steady idle, and sustained performance as your vehicle experiences everyday commutes or more spirited driving.

What makes Bosch Double Iridium Spark Plugs stand out

• 4X longer life compared with standard copper plugs due to iridium materials and precise geometry
• 360-degree laser-welded ultra-fine wire firing pin improves ignitability and durability, with up to a 24% reduction in voltage requirements
• Nickel-plated rolled threads offer corrosion resistance and negate the need for anti-seize, simplifying installation
• Factory pre-gapped out of the box, so you can install with minimal setup
• OE-matched for Gasoline Direct Injection (GDI) engines, helping ensure compatibility with modern powertrains

Real-world use and feel

In daily driving, these plugs can contribute to crisper cold starts and a steadier throttle response as the engine seeks optimal combustion. While results can vary by vehicle and driving style, the robust iridium design is built to withstand the demands of modern combustion, supporting reliable ignition across diverse conditions.

Fit, install, and vehicle coverage

Designed to be a straightforward upgrade, these plugs are intended to fit a broad range of modern gasoline engines. Their OE intent means they’re prepared for contemporary powertrains, including those using GDI technology. For exact fit, refer to the fit check tools and your vehicle’s specifications.

• Chrysler: 2009-2022 300; 2009 Aspen
• Dodge: 2009-2022 Challenger; 2009-2022 Charger; 2009, 2011-2022 Durango
• Jeep: 2009-2010 Commander; 2009-2023 Grand Cherokee; 2021-2023 Grand Cherokee L; 2022-2023 Wagoneer
• Ram: 2011-2023 Ram 1500; 2019-2022 Ram 1500 Classic; 2011-2019 Ram 2500/3500/4000

With Bosch engineering, you’re looking at a solution designed to complement modern engines, offering a steady, dependable ignition path as part of a broader maintenance plan.