Mercedes-Benz Passenger A0025428519 Relay

Description

The Mercedes-Benz Passenger Relay (MPN A0025428519) is a compact electrical switch designed to manage power circuits in automotive systems. It fits neatly into the Power Supply section of the vehicle’s electrical architecture, delivering reliable switching performance while keeping the unit small at 20 × 20 × 30 mm. Produced in Malaysia, this relay offers durable operation under harsh conditions and low power consumption for efficient vehicle power management.

Key Features & Benefits

A relay is basically an electrically operated switch. It takes a relatively small electrical signal and uses that to control a much larger one. Think of it like a gatekeeper – a little nudge opens a big door. It allows a low – current circuit to control a high – current circuit. They handle things like headlights, the starter motor, the horn – anything that needs a lot of power to run. They’re scattered all over the vehicle, mostly in the under – hood electrical center, but sometimes you’ll find them in the body control module area too. They're part of a circuit, sitting between the power source and the device they’re controlling. They don’t make the power, they just direct it where it needs to go. They’re often used where running a high – current wire directly from a switch to the device would be impractical or unsafe.

Symptoms, Risks & Replacements

They protect the wiring and other components. Without a relay, those high – current devices would put a huge strain on your switches and wiring, leading to overheating and potentially a fire. It acts like a shield for the sensitive parts of your system. You’ll notice if a relay goes bad because the associated device – a headlight, the starter, whatever it is – will stop working, or might work intermittently. Sometimes you'll get nothing at all. We carry a pretty good selection of these at Fixparts Online, and matching the right one is key. It’s usually labeled with a part number that makes it easier to find the correct replacement.

Warranty Information

Mercedes-Benz Passenger Relay (MPN A0025428519) comes with a 1-year warranty.