Bosch 7911 Spark Plug

Bosch Nickel Spark Plug 7911 Overview

Bosch 7911 is a conventional nickel-copper spark plug built for steady ignition performance and value. It uses a yttrium-enhanced nickel center electrode with a copper core to support longer service life than a basic copper-core plug, while meeting or exceeding OE specifications for nickel-copper applications.

For drivers servicing older import and domestic engines, Bosch 7911 offers the correct secondary ignition design for a wide range of classic applications, including BMW 320i, Toyota Land Cruiser, Jeep CJ5, and Mercedes-Benz 380SL.

Key Features

• Conventional nickel-copper spark plug for 4-cycle engines
• Nickel-ytrium center electrode with copper core for durable ignition performance
• Resistor design rated at 6000 ohms
• Tapered V-profile ground electrode tip for consistent spark exposure
• Flat seat, 14 mm thread diameter, 19 mm reach
• Non-projected ceramic insulator with standard ground configuration
• Pre-gapped at .8 mm from the factory

Product Details

Bosch Nickel line focuses on conventional spark plug construction for engines that call for a nickel-copper core design rather than a platinum or iridium upgrade. Part number 7911 is engineered around OE-style dimensions and heat range 9 specifications, making it a direct-service choice for many older vehicles that rely on precise plug fitment and stable ignition output. This part number was previously cataloged as 7512.

Compatible fitment includes 1968-1974 Cadillac DeVille, 1975-1978 Toyota Land Cruiser, 1981-1985 Mercedes-Benz 380SL, 1984-1985 BMW 318i, and 1987-1988 Rolls-Royce Silver Spur. It also appears in applications such as Geo Metro, Pontiac Sunbird, Chevrolet S10, and Jeep CJ7 where the listed gap and engine specification match the vehicle requirement.

Common Issues This Plug Can Address

• Hard starting caused by worn or fouled spark plugs
• Rough idle from weak or inconsistent spark delivery
• Misfire symptoms tied to aged secondary ignition components
• Reduced throttle response from degraded plug electrodes
• Maintenance replacement for OE-style nickel-copper plug applications

Installation Notes and Fitment Tips

Verify the vehicle’s required gap, heat range, seat type, and reach before installation. Bosch 7911 is listed across multiple fitments with different gap specifications, so the engine application should be checked against the under-hood specification label or service manual before use. Confirm the plug matches the vehicle’s original nickel-copper style requirement, especially on older BMW, Toyota, Jeep, and Mercedes-Benz engines.

Fits 1968-1974 Cadillac DeVille, N/A; Fits 1975-1978 Toyota Land Cruiser, N/A; Fits 1981-1985 Mercedes-Benz 380SL, N/A; Fits 1984-1985 BMW 318i, N/A; Fits 1987-1988 Rolls-Royce Silver Spur, N/A.

Quality Assurance

Bosch manufactures this spark plug to meet or exceed original equipment specifications for nickel-copper core applications. The conventional construction, resistor design, and OE-style dimensions support consistent service in the listed fitments, including Bosch 7911 applications across classic import and domestic engines.