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    Relay, glow plug system

    Product number: 4RA 007 507-021
    ART: 4RA 007 507-021 / EAN: 4082300544329

    HELLA
    Advised products
    Price incl. vat.
    € 19,98
    Add to cart
    Leverdatum: 03-09-2026

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    Manufacturer Model Version Engine code Construction type Construction start Construction end Pk Power kw
    AUDI AUDI
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    Relay, glow plug system

    The Relay, glow plug system (4RA 007 507-021) controls power delivery to glow plugs for reliable cold starting. Replacing a faulty relay restores proper preheating and smoother engine operation. Use Porza’s smart search to find the correct relay.

    FAQ

    A relay for a glow plug system is an electrical control component that regulates power supply to the glow plugs in diesel engines. Its function is to switch high current to the glow plugs based on signals from the engine control unit (ECU), ensuring they heat up before and sometimes after engine start. This enables reliable cold starts and smoother engine operation.

    Key specifications include operating voltage (typically 12V or 24V), current capacity, number of outputs (for multiple glow plugs), connector type, and compatibility with the vehicle’s control system. The relay must handle high electrical loads and operate reliably in engine bay conditions, including temperatures from approximately -40°C to +125°C.

    Replacement is necessary when the relay fails to supply power correctly, causing issues such as difficult cold starts, glow plug warning lights, or engine fault codes. A faulty relay may also cause glow plugs to stay on too long or not activate at all. Diagnosis is usually confirmed through electrical testing or diagnostics.

    Porza offers a fit guarantee option where your vehicle details, such as license plate or VIN, are checked against product specifications. This ensures the relay matches your vehicle’s electrical system, connector type, and glow plug configuration, reducing the risk of incorrect fitment.

    Porza supplies high-quality electrical and engine components with fast delivery across Europe. Customers can order online or choose in-store pickup in the Netherlands, Germany, or Belgium. This allows quick access to essential parts for both professional workshops and individual users.

    If you select the fit guarantee, Porza verifies compatibility before shipment. If the product does not fit or meet expectations, it can be returned according to the return policy. This ensures a reliable and risk-free purchasing experience.

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