Spark Plug for 1991-1995 Ford Explorer & More - Bosch 9657

Bosch 9657 spark plug for the 1991-1995 Ford Explorer V6 4.0L and other vehicles fires the air-fuel mixture in each cylinder with a fine wire double iridium design. It is engineered for both high performance and long life.

• Ultra-fine wire design that needs up to 24% less voltage to ignite
• Iridium firing pin and iridium ground electrode inlay
• 360 degree continuous laser welding for durability
• Copper core for a broader heat range that resists pre-ignition and fouling
• Pre-gapped with nickel-plated threads, so no gap adjustment or anti-seize is needed
• Laser welded, tapered ground electrode for ignition throughout the plug's life

Quick facts

• Part: Bosch 9657 spark plug
• Fits: the 1991-1995 Ford Explorer V6 4.0L and other vehicles
• Condition: New

A worn plug can show up as hard starting, a misfire or a rough idle. Before you replace the plugs, rule out a weak ignition coil or a damaged plug wire, since either can produce a similar misfire.

Fits

This double iridium plug fits the 1991-1995 Ford Explorer V6 4.0L and the 1983 Ford Mustang V6 3.8L. It also fits the 1985 Ford Ranger V6 2.8L, the 1985-1988 Ranger 4-cylinder 2.0L and the 1986-1992 Ranger V6 2.9L. Each listing is one plug, and these engines take four or six. If your car isn't named here, look up your year and engine in the "Vehicles it fits" section.

Specifications

In the box

One spark plug.