Bosch 6702 OE Fine Wire Platinum Spark Plugs - Pack of 4, Fine-Wire Platinum for Improved Ignitability and Longer Life

Bosch 6702 OE Fine Wire Platinum Spark Plugs are a factory-style, fine-wire platinum spark plug engineered to boost ignitability and extend service life in compatible gasoline engines.

These Bosch OE Fine Wire Platinum plugs use a precision fine wire platinum center electrode and a yttrium-enhanced ground electrode to combine improved spark performance with longer durability than standard copper-core plugs. Built for reliable starts, consistent combustion and easy maintenance, the plugs come pre-gapped and incorporate features that resist corrosion and reduce flash-over, helping the ignition system focus energy where it matters — across the spark gap.

How do these plugs improve engine ignitability and fuel efficiency?

The fine wire platinum center electrode reduces the voltage needed to create a strong, consistent spark, which can translate to more complete combustion under many driving conditions. Better ignitability helps the engine burn fuel more completely, which can assist with smoother throttle response and steady idle.

• 360° continuous laser-welded platinum firing pin for consistent spark delivery
• Tapered ground electrode to concentrate the spark energy
• Fine wire center electrode lowers required firing voltage
• Pre-gapped at the factory for immediate installation

What makes Bosch's electrode design last longer than conventional plugs?

Bosch combines a platinum fine wire firing pin with a yttrium-enhanced ground electrode to reduce wear and resist oxidation. The upgraded metallurgy slows electrode erosion, which maintains the spark gap and performance over a longer service interval compared with basic copper plugs.

• Yttrium-enhanced ground electrode offers up to two times longer life versus copper plugs
• Platinum welding improves corrosion resistance at the center electrode
• Durable nickel-plated rolled threads reduce galling and ease removal

Will installation and maintenance require special tools or anti-seize?

No special anti-seize compound is required thanks to Bosch’s premium nickel-plated rolled threads, which resist corrosion and prevent galling. Each plug is factory pre-gapped and ready to install, so you can fit them with standard spark plug sockets and a torque wrench to the vehicle manufacturer’s spec.

• Pre-gapped at the factory — no gap adjustment needed before installation
• Nickel-plated threads eliminate the need for anti-seize on steel heads
• Standard spark plug tools and torque spec are all that's required

Which vehicles are these Bosch 6702 plugs compatible with?

The Bosch 6702 OE Fine Wire Platinum is designed for a wide range of makes and model years across domestic and import vehicles. It fits many gasoline engines from compact cars to light trucks — always verify fitment against your vehicle’s year, make, model and engine code before purchase.

• Selected Honda, Toyota, Hyundai, Mazda, Nissan, Subaru and more (see detailed fitment)
• Common OEM replacement for many 1990s–2010s passenger cars and light trucks
• Sold in a convenient pack of four for multi-cylinder maintenance

Who is this for: The Bosch 6702 OE Fine Wire Platinum Spark Plug is aimed at drivers and mechanics seeking a cost-effective upgrade from copper plugs to a longer-lasting, higher-ignitability option that matches OEM performance. It's ideal for routine tune-ups, restoration projects, or anyone who wants reduced maintenance frequency, reliable starts and straightforward, factory-ready installation for compatible vehicles.