Bosch 79002 Spark Plug

Bosch Nickel Spark Plug 79002 Overview

Bosch 79002 is a conventional nickel-copper spark plug built for steady ignition performance and OE-style service life. It uses a heavy-duty nickel-ytrium center electrode with a copper core, along with a resistor design for cleaner electrical operation in 4-cycle engines.

The Bosch Nickel line focuses on practical replacement value, combining a ceramic insulator, flat seat, and standard ground configuration for direct-service applications. For drivers servicing Toyota Tacoma, Toyota 4Runner, Nissan Pathfinder, or Nissan Quest ignition systems, Bosch 79002 provides a straightforward spark plug option matched to listed factory-style requirements.

Key Features

• Conventional nickel-copper spark plug for secondary ignition service
• Nickel-ytrium center electrode with copper core for durable electrode construction
• Resistor design rated at 6000 ohms
• Tapered ground electrode tip with v-groove design
• Flat seat, standard ground configuration, and non-projected insulator type
• 14 mm thread diameter, 19 mm reach, and 16 mm hex size
• Manufacturer heat range 8 for specified engine applications

Product Details

Bosch 79002 is engineered to meet or exceed original equipment specifications for nickel-copper core spark plugs. The Bosch Nickel product line is aimed at dependable replacement service where a conventional spark plug design is required, and this part number is listed across a broad range of Toyota and Nissan applications. It is a direct-fit option for vehicles such as the 2001-2004 Toyota Tacoma, 2000 Toyota 4Runner with California Emission System, and select Nissan Pathfinder, D21, Pickup, Quest, and Toyota Paseo, Celica, and MR2 applications. This part cross-references Bosch 79002 for the same application.

Common Issues This Part Can Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent spark delivery
• Misfire conditions related to aged ignition components
• Reduced throttle response from degraded plug performance
• Service intervals reached on OE-style nickel-copper plugs

Installation Notes

Verify the vehicle-specific gap and application notes before installation, since listed fitments include different gap requirements such as 0.032 in and 0.044 in. Confirm the correct engine and emission configuration for Toyota Tacoma, Toyota 4Runner, Nissan Pathfinder, Nissan Quest, and other listed models before replacing plugs. Use the specified thread diameter, reach, seat type, and heat range to match the engine’s original requirements.

Quality Assurance

Bosch designs this Nickel spark plug to align with OE specifications for nickel-copper core applications. The conventional construction, resistor design, and nickel-ytrium center electrode support consistent service in the listed Toyota and Nissan fitments, including 1990-2004 model-year applications shown in the fitment data.