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    Relay, glow plug system

    Product number: 34451
    ART: 34451 / EAN: 4027816344513

    FEBI BILSTEIN
    Advised products
    Price incl. vat.
    € 108,57
    Leverdatum: 03-06-2026

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    Manufacturer Model Version Engine code Construction type Construction start Construction end Pk Power kw
    MERCEDES-BENZ MERCEDES-BENZ
    Manufacturer Productnumber
    MERCEDES-BENZ 005 545 40 32 , 0055454032
    MERCEDES-BENZ 006 545 90 32 , 0065459032
    MERCEDES-BENZ 007 545 99 32 , 0075459932
    MERCEDES-BENZ 013 545 24 32 , 0135452432
    MERCEDES-BENZ A005 545 40 32 , A0055454032
    MERCEDES-BENZ A006 545 90 32 , A0065459032
    MERCEDES-BENZ A007 545 99 32 , A0075459932
    MERCEDES-BENZ A013 545 24 32 , A0135452432
    STEYR 754 599 32 , 75459932
    Usage numbers

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    Relay, glow plug system

    The Relay, glow plug system (34451) 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.

    Febi Bilstein is a globally respected manufacturer and supplier of high-quality replacement parts for passenger cars and commercial vehicles. With over 175 years of automotive expertise, Febi stands for reliability, innovation, and German engineering precision. The brand offers an extensive product range of more than 47,000 items, covering steering, suspension, braking, engine, drivetrain, and electrical systems.

    Every Febi component meets or exceeds OEM standards, ensuring optimal fit, performance, and durability. Their in-house production and strict quality control guarantee parts that professionals trust worldwide. Febi Bilstein is also a pioneer in the aftermarket, being one of the first to offer parts with full OE-matching quality outside the dealership network.

    Whether you're servicing a modern European vehicle or maintaining a heavy-duty truck, Febi provides reliable solutions with fast availability and long-lasting performance. Choose Febi Bilstein for precision-made parts backed by generations of expertise and a commitment to quality.

    Wilhelmstraße 47, Ennepetal, Duitsland

    +492333911-0

    support@bilsteingroup.com

    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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    Straelseweg 52, 5911 CR
    Venlo
    The Netherlands

    Willem de Rijkelaan 15a, 5616 HH
    Eindhoven
    The Netherlands

    info@porza.nl
    085 401 1901
    KVK 0123456678
    BTW 01NL123435B1