Bosch 7997 Spark Plug

Bosch Nickel Spark Plug 7997 Overview

Bosch 7997 is a conventional nickel-copper spark plug built for steady ignition performance and value. It uses a heavy-duty nickel-ytrium center electrode with a copper core, along with a nickel ground electrode, to support consistent spark delivery in 4-cycle engines.

For drivers searching for Bosch spark plug 7997, Bosch Nickel 7997, or an OE-style nickel-copper spark plug for secondary ignition service, this plug is engineered to meet or exceed original equipment specifications for nickel-copper core applications.

Key Features

• Conventional nickel-copper spark plug design for everyday engine service
• Nickel-ytrium center electrode with copper core for extended service life
• Resistor design rated at 6000 ohms for ignition noise control
• Tapered V-profile ground electrode tip for stable spark exposure
• Flat seat, 14 mm thread diameter, and 12.7 mm reach
• Pre-gapped to .8 mm for OE-style setup
• Ceramic insulator and non-projected insulator type
• Heat range 7 for applications specified by the vehicle manufacturer

Product Details

Bosch Nickel line focuses on conventional spark plug construction with materials selected for durability and dependable ignition performance. Part number 7997 uses a nickel-ytrium center electrode tip with a copper-core center electrode, which helps maintain consistent firing characteristics in standard ignition systems. The single ground electrode uses a tapered V-profile tip and standard configuration, while the resistor design supports reduced electrical interference. This Bosch 7997 spark plug is a practical OE-style replacement for service work where the original specification calls for a nickel-copper plug.

Searches for Bosch 7997 spark plug, Bosch Nickel spark plug 7997, and Bosch ignition parts for Honda Civic or Toyota Corolla service often point to this type of conventional secondary ignition component. Always verify the exact engine and plug specification against the vehicle application before ordering.

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 secondary ignition components
• Reduced fuel economy from degraded ignition performance
• Ignition noise concerns in resistor-equipped systems

Installation Notes and Tips

Confirm the required thread diameter, reach, seat type, and heat range before installation. Bosch 7997 is pre-gapped to .8 mm, but the gap should still be checked against the engine specification prior to use. Inspect the ignition coil, plug wires, and boots during service, and install the plug to the manufacturer’s torque specification to avoid thread or sealing damage. This part is commonly searched for as a Bosch spark plug for Honda Civic and Toyota Corolla maintenance, so verify the exact engine code and plug callout before installation.

Quality Assurance

Bosch states that this Nickel spark plug line is engineered to meet or exceed original equipment specifications for nickel-copper core spark plugs. That makes Bosch 7997 a straightforward choice for routine ignition service where OE-style construction and material quality matter.