Spark Plug Diagram - Anatomy, Function & Replacement Guide #215077 (License: Personal Use)

This technical illustration shows a high-performance spark plug featuring a ceramic insulator, nickel-alloy or iridium-tipped center electrode, and a grounded side electrode. The hexagonal shell allows for easy installation/removal with a socket wrench, while the ribbed insulator prevents electrical arcing. Designed for internal combustion engines, it ignites the air-fuel mixture via a high-voltage spark at precise intervals.

Used on automotive repair guides, OEM parts pages, mechanic training materials, and DIY maintenance blogs; targets users searching for spark plug identification, replacement intervals, or troubleshooting misfires.