Main relay

The main relay is a central electrical component in the vehicle and controls and distributes electrical energy to important systems. It ensures that various electronic components are only supplied with power when the vehicle is switched on.

In many vehicles, the main relay controls the power supply to important systems such as the engine control unit, injection system, fuel pump, and ignition system. As soon as the ignition is activated, the relay opens the circuit, thus enabling these systems to operate.

A relay functions as an electrically controlled switch. A small control current activates an electromagnetic coil within the relay, which in turn switches a larger electrical circuit. This allows high-power devices to be controlled safely and efficiently.

The main relay is often located in the fuse box or in the engine compartment. It is designed to reliably handle high electrical loads and temperature fluctuations within the vehicle.

A faulty main relay can cause important vehicle systems to lose power. Typical symptoms include starting problems, engine control unit failures, or sudden engine shutdown.

At Autoteile Gossau, you'll find main relays in original equipment and high-quality aftermarket versions for numerous vehicle models. Benefit from the lowest prices in Switzerland, fast delivery, or pick up your order directly from our store in Gossau and pay conveniently by cash or card.