Bosch 8524 Spark Plug

Bosch EVO Spark Plug 8524

Bosch EVO spark plug 8524 is built for modern gasoline engines that demand stable ignition under high heat and pressure. It uses an iridium fine-wire center electrode, platinum-tipped ground electrode, and a projected ceramic insulator to support consistent spark performance over a long service life.

Key Features

• Iridium fine-wire center electrode for precise spark delivery.
• Platinum ground electrode tip for durable ignition performance.
• Tapered seat and J-gap configuration for OE-style fitment.
• High dielectric strength construction for resistance to irregular combustion events.
• 4-cycle spark plug design with 12 mm thread diameter and 14 mm hex size.

Detailed Description

The Bosch EVO line is engineered for modern turbocharged gasoline direct injection engines and other advanced ignition systems that place higher demands on spark plugs. Part number 8524 features a copper core, ceramic insulator, fine-wire center electrode, and a 0.65 pre-gap to promote reliable ignition in demanding operating conditions. Bosch develops and produces the EVO line to the same quality level as original equipment spark plugs, making this Bosch spark plug a direct-fit service part for applications such as the Ford Fusion and Ford Escape.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Is Used For

• Misfires caused by worn or heat-stressed spark plugs.
• Hard starting from weak or inconsistent ignition output.
• Rough idle linked to degraded spark quality.
• Loss of combustion stability in high-demand engine conditions.
• Service replacement for OE-style ignition maintenance.

Installation Notes and Tips

Verify the tapered seat, 12 mm thread diameter, 28 mm reach, and 0.65 pre-gap before installation. Confirm the engine specification for the Ford Fusion or Ford Escape application and follow the manufacturer’s torque procedure and service interval recommendations.

Quality Assurance

Bosch EVO spark plugs are developed and produced to OE-level quality standards for modern engine requirements. Part number 8524 is engineered for reliable ignition performance throughout its service life.