Glow plug relay

The glow plug relay is an important component of the preheating system of diesel engines and controls the power supply to the glow plugs. It ensures that the glow plugs are supplied with the necessary electrical energy before the engine starts and, in some cases, also during engine operation, in order to sufficiently heat the combustion chamber.

When a diesel engine is started, the engine control unit activates the glow plug relay, which then enables the flow of current to the glow plugs. This heats the glow plugs to high temperatures, ensuring that the injected fuel ignites reliably even at low ambient temperatures. This improves the engine's starting performance and reduces emissions during the cold start phase.

The glow plug relay functions as an electronic switching element and is usually installed in the engine compartment or within the vehicle's electronics system. Modern systems are often equipped with control functions that automatically adjust the glow time and afterglow phase to the engine and ambient temperature.

Glow plug relays are designed for high electrical loads and feature robust housings and high-performance switching contacts. These components must withstand the conditions found in the engine compartment, such as heat, humidity, and vibrations, over the long term.

At Autoteile Gossau, you'll find glow plug relays for numerous vehicle makes and models, both original equipment and high-quality aftermarket parts. Benefit from the lowest prices in Switzerland, fast delivery, or convenient in-store pickup in Gossau with cash or card payment.