Bosch Iridium Double Spark Plugs - Pack of 4, Fine-Wire OE Fit for GDI Engines, Pre-Gapped

BOSCH 96315 OE Fine Wire Double Iridium spark plugs are precision-engineered replacement plugs that combine ultra-fine iridium electrodes and factory pre-gapping for reliable ignition and extended service life.

These Bosch double iridium plugs are built to the same specifications used by vehicle manufacturers and are intended for modern gasoline engines, including many Gasoline Direct Injection (GDI) applications. With a laser-welded fine wire center and an iridium ground inlay, they’re designed to improve ignitability and resist wear far longer than traditional copper plugs. Each plug comes pre-gapped and features corrosion-resistant nickel-plated rolled threads so installation is straightforward and maintenance is simplified.

How do these spark plugs improve engine ignition?

The ultra-fine iridium center electrode lowers the voltage needed to create a spark, which helps the ignition system fire more reliably under a variety of conditions. The double-iridium design increases electrode durability and maintains consistent spark geometry for better combustion over time.

• 360° laser welded fine-wire center electrode for sharper spark focus
• Iridium ground inlay extends electrode life and preserves spark gap
• Reduces required ignition voltage for improved starting and throttle response

What makes Bosch OE fit and installation easy?

Bosch supplies these plugs pre-gapped to OEM specifications so they’re ready to install right out of the box, eliminating the need for adjustments before fitting. The nickel-plated rolled threads resist corrosion and are designed to unthread cleanly from the cylinder head without galling, so you can install or remove plugs without using anti-seize compounds.

• Factory pre-gapped to OE spark position for accurate fit
• Nickel-plated rolled threads resist rust and simplify removal
• No anti-seize required—saves installation time and avoids over-torquing

Which vehicles and engine types are these plugs compatible with?

These Bosch double iridium plugs are made to meet the design standards of many modern gasoline engines, including numerous GDI-equipped models across major brands. Fitment depends on engine variant and model year, so always confirm compatibility with your vehicle’s fitment tool or parts guide.

• Covers select GM, Ford, Lincoln, Mazda, Jaguar, Land Rover, Buick, Cadillac, GMC models
• Common applications include performance cars, trucks, SUVs, and vehicles with direct-injection engines
• Pack of four suits many 4-cylinder and select multi-cylinder applications—verify cylinder count before purchase

How do these plugs affect maintenance and service intervals?

Double iridium electrodes are far more wear-resistant than conventional copper plugs, which helps maintain ignition efficiency between service intervals. While Bosch iridium plugs extend usable life, follow your vehicle manufacturer’s recommended service schedule for inspection and replacement.

• Iridium electrodes deliver longer service life compared to copper types
• Consistent spark gap helps stabilize fuel burn and performance over time
• Check manufacturer maintenance intervals for precise replacement timing

Who is this for? Drivers and technicians who want an OEM-level spark plug upgrade that balances performance, durability, and hassle-free installation. These Bosch 96315 double iridium plugs are suited for owners of compatible GM, Ford, Mazda, Jaguar, Land Rover, Lincoln and other vehicles with gasoline or GDI engines who prefer longer-lasting electrodes, reliable starts, and clean removal during routine maintenance.