These little guys are basically tiny electric heaters inside your engine. They heat up the combustion chamber—the space where the fuel and air mix—to get things started, especially when it’s cold. They’re a resistive heater, meaning electricity flows through them and creates heat. It’s a pretty simple idea, but crucial. They're most important in diesel engines. Diesels don’t have a spark plug like a gas engine. Instead, the extreme heat from the glow plug ignites the fuel. When you turn the key, the glow plugs preheat that air, and that makes it possible for the diesel fuel to ignite on compression. They usually only run for a short time when starting, and sometimes briefly after, depending on the engine and the temperature. After the engine is warm, they typically aren’t needed. If a glow plug goes bad, your engine will be really hard to start, especially in cold weather. It might start eventually, but it’ll be struggling. You’ll notice if it's taking a long time to fire up, or if it's running really rough when it does. They act like a shield against cold starting issues. If multiple plugs fail, it may not start at all. They’re relatively inexpensive parts, and replacing them proactively can save you a lot of headaches down the road. We often see folks get a set of them replaced together, since they tend to wear out around the same time. You can find glow plugs and a lot of other engine parts at places like Fixparts Online, but we keep a good stock here too. Shop smarter: Glow Plug (MPN ADN11832) is covered for 12 months!

About Blue Print

Blue Print provides a comprehensive range of precision-engineered replacement parts for Asian, American, and European vehicles, known for their quality and exact fit.

Why Choose Blue Print?

• We offer a really wide range of parts, covering most popular cars. You're likely to find what you need with us. • Blue Print parts are made to the same quality as original equipment, so you get a reliable product without the high price. • We're constantly adding new parts to our range, keeping up with the latest car models. • We work with garages and car owners alike, offering parts you can trust for all kinds of repairs and maintenance. Blue Print – trusted quality, available at FixParts Online!