Bosch 7501 Spark Plug

Bosch 7501 Nickel Spark Plug Overview

Bosch 7501 is a conventional nickel-copper spark plug built for steady ignition performance and OE-style service life. It uses a yttrium-enhanced nickel center electrode with a copper core, making it a practical choice for older import engines that call for a standard 4-cycle plug.

Compatible With select Hyundai Sonata, Mitsubishi Eclipse, Honda Civic, and Isuzu Pickup applications, Bosch 7501 supports factory-style ignition requirements across a wide range of 1980s and 1990s vehicles. The Bosch Nickel line focuses on value-oriented replacement parts that meet or exceed original equipment specifications for nickel-copper core spark plugs.

Key Features

• Conventional nickel-copper spark plug for secondary ignition systems
• Nickel-yttrium center electrode with copper core for extended service life
• Standard ground electrode and standard ground configuration
• Resistor plug with 6000 resistance
• Ceramic insulator and flat seat design
• 4-cycle spark plug type with 14 mm thread diameter and 19 mm reach
• Pre-gapped at 1.1 mm
• Bosch Nickel line replacement for OE-style fit and function

Product Details

Bosch 7501 is engineered as a direct-style replacement spark plug for older gasoline engines that use a standard nickel-copper design. The nickel-ytrium center electrode and copper core help maintain consistent spark delivery, while the resistor design supports ignition system noise control. This part number is commonly searched for fitment on Hyundai Sonata, Mitsubishi Eclipse, and Honda Civic applications, as well as other import vehicles listed in the fitment data. If you are replacing worn plugs in a Mitsubishi Galant, Suzuki Swift, or Isuzu Pickup, Bosch 7501 matches the OE-style nickel plug format used in many of these engines.

This part cross-references standard OE-style nickel spark plug applications for the same vehicle coverage.

Common Problems It Can Address

• Hard starting caused by worn spark plug electrodes
• Rough idle from inconsistent ignition firing
• Misfire conditions related to aged plugs
• Reduced throttle response from weak spark output
• Maintenance replacement for high-mileage ignition service

Installation Notes and Fitment Tips

Verify the required gap before installation, since listed applications include 0.032 in, 0.040 in, 0.043 in, and 0.044 in specifications depending on vehicle and engine setup. Bosch 7501 uses a flat seat, 14 mm thread diameter, 19 mm reach, and 20.8 mm hex size. Confirm the engine calls for a standard nickel-copper spark plug with a resistor design before ordering. Fits 1989-1998 Hyundai Sonata, N/A; Fits 1990-1994 Mitsubishi Eclipse, N/A; Fits 1985-1987 Honda Civic, N/A; Fits 1981-1989 Isuzu Pickup, N/A; Fits 1989-1993 Mitsubishi Galant, N/A.

Quality Assurance

Bosch manufactures this spark plug to meet or exceed original equipment specifications for nickel-copper core spark plugs. The Bosch Nickel product line is built for dependable replacement service in older import applications where standard copper-core ignition performance is required.