Glow plugs are essential components in diesel engines, responsible for preheating the combustion chambers to facilitate cold starts. Positioned within each cylinder, these heating elements rapidly warm the air entering the cylinder, enabling ignition without excessive cranking. Glow plugs are typically constructed from a nickel-chromium alloy heating element encased in a durable metal sheath, designed to withstand extreme temperatures and combustion byproducts. Modern glow plugs often utilize ceramic technology for faster heating and extended lifespan. Examples in our selection include Bosch glow plugs (MPN 0250403008) suitable for various diesel applications, and Febi Bilstein glow plugs such as MPN 15956 and FEBI34828 for specific vehicle models. These Service Parts > Major Service > Glow Plugs are critical for engine performance, particularly in colder climates.