These little guys are basically heating elements. They get incredibly hot – we’re talking red hot – inside the cylinder of your engine. They’re specifically for diesel engines, not gasoline ones. What they do is warm up the combustion chamber so the diesel fuel ignites properly when it’s cold. Think of them like a tiny starter for the fuel itself. Diesel fuel needs a lot of heat to burn, especially when the engine is cold. The glow plug heats the air inside the cylinder, creating a hot spot where the fuel can ignite. When you turn the key, the engine control unit sends power to these plugs. They heat up very quickly, and that initial heat kickstarts the combustion process. Once the engine is running and generating its own heat, the glow plugs aren't needed anymore, but they’re still ready to go when you restart it when cold. They operate for a limited time during startup and then switch off. If a glow plug fails, especially in cold weather, it’s going to make your engine really hard to start, or maybe not start at all. You’ll notice if it’s struggling to fire up, particularly on a chilly morning. It might crank and crank but just won’t catch. Sometimes, a failing glow plug will cause a lot of white smoke from the exhaust. They’re a critical part of getting a diesel engine going. You can find replacements pretty easily. Fixparts Online has a good selection, and they’re not too difficult to replace if you’re reasonably handy. But ignoring a bad glow plug just means you’ll be stuck with a no – start situation eventually. Eco-friendly and safe: Glow Plug (MPN DG628) comes with a 12-month warranty!

About DENSO

Denso focuses on innovation and sustainability, making them a key partner for the automotive industry.

Why Choose DENSO?

• DENSO parts are known for lasting a long time, so you won’t have to replace them often. • They’re a top supplier to many car manufacturers, meaning you get the same quality parts originally put in your vehicle. • DENSO offers a wide range of parts, from spark plugs to air conditioning components, so you can find what you need. • They are constantly innovating and improving their technology to keep your car running efficiently. Performance you can rely on – DENSO parts from FixParts Online.