8631607 Volvo Passenger GLOW PLUG

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. Satisfaction guaranteed: Glow Plug (MPN 8631607) comes with a 12-month warranty!

About Volvo Passenger

Volvo Passenger is a premium Swedish brand renowned for its focus on safety and innovative automotive technology. Based in Sweden, Volvo Passenger continues to lead in advanced driver-assistance systems and passenger comfort.

Why Choose Volvo Passenger?

• Get parts made specifically for your Volvo – they’re designed to fit and work perfectly. • We use high-quality materials, so our parts are built to last and keep your Volvo running smoothly. • You’ll find a wide selection of parts, from everyday maintenance items to more complex components. • Choosing Volvo Passenger helps maintain your Volvo’s safety features and overall value. Drive with confidence – choose Volvo Passenger parts at FixParts Online.