Skip to main content
+48 888 638 546
sale@ecusale.com

These products will be shipped today if you order within:

English €
Open search engine
Search
Close search engine Clear Search
Wishlist
Products in the cart: 0. See details

Your cart is empty

Discover Our Collections

    51840854B 0261201759 ECU Engine Controller Fiat 500 VIRGIN Plug & Play 51840854
    Go to Product feedback

    Product safety

    Manufacturer

    Robert Bosch GmbH

    Robert-Bosch-Platz 1

    70839 Gerlingen, Germany

    +49 711 400 40990 contact@bosch.com Report a product safety issue

    Responsible person in the EU

    AUTO-ELEKTRONIKA DAMIAN SOSNOWSKI

    Lelowska 20

    42-235 Biała Wielka, Poland

    +48888638546 sale@ecusale.com Report a product safety issue

    Importer

    AUTO-ELEKTRONIKA DAMIAN SOSNOWSKI

    20 Lelowska

    42-235 Biała Wielka, Poland

    +48888638546 sale@ecusale.com

    Manufacturer: BOSCH (go to products)

    51840854B 0261201759 ECU Engine Controller Fiat 500 VIRGIN Plug & Play 51840854

    Bosch ECU 0261201759 for Fiat 500 1.2 8V – VIRGIN Plug & Play Version

    51840854 B / 51840854 / 0261201759 is a tested ECU ENGINE CONTROLLER for the Fiat 500 1.2 8V, prepared in VIRGIN Plug & Play version. After installation, the module automatically adapts to the vehicle and immobilizer system.

    Go to full description

    Select product variant:

    Individual variants may differ in price

    with VAT without VAT
    Price €209.93

    Shipping costs are not included in the price.

    English €
    Shipping from €41.99 - UPS express delivery around world (Afghanistan)

    express delivery 3-6 days
    pcs
    Availability:
    available
    Shipping time: 48 hours
    with VAT without VAT
    Price €209.93

    Shipping costs are not included in the price.

    Select product variant:

    Individual variants may differ in price

    Shipping time: 48 hours
    Shipping from €41.99 - UPS express delivery around world (Afghanistan)

    express delivery 3-6 days
    Tap an option to see details

    💳 Secure Payments

    Stripe, PayPal, Google Pay, Apple Pay, BLIK, and all major credit and debit cards.

    🚚 UPS Shipping Across Europe

    Delivery across Europe usually takes 1–3 business days.

    🌍 Worldwide UPS Shipping

    Worldwide delivery usually takes 5–7 business days.

    Bosch ECU 0261201759 for Fiat 500 1.2 8V – VIRGIN Plug & Play Version

    51840854 B / 51840854 / 0261201759 is a tested ECU ENGINE CONTROLLER for the Fiat 500 1.2 8V, prepared in VIRGIN Plug & Play version. After installation, the module automatically adapts to the vehicle and immobilizer system.

    Go to full description

    💳 Secure Payments

    Stripe, PayPal, Google Pay, Apple Pay, BLIK, and all major credit and debit cards.

    🚚 UPS Shipping Across Europe

    Delivery within the European Union typically takes 1–3 business days.

    🌍 Worldwide UPS Shipping

    Worldwide delivery usually takes 4–7 business days.

    Information

    • CAR MODEL FIAT 500
    • ENGINE 1.4
    • OEM: 51840854B 0261201759
    • PART NUMBER 51840854
    • PLUG AND PLAY VIRGIN
    • WARRANTY 6 MONTH
    • TESTED Second hand product
    • PAYMENT: Credit Card , Bank Transfer , PayPal
    • EXPRESS DELIVERY – in EU Countries: European Union 2-3 working days
    • INTERNATIONAL DELIVERY – Outside EU Countries: Worldwide 4-7 working days

    51840854 B 0261201759 – Fiat 500 1.2 8V engine ECU VIRGIN Plug & Play

    The engine ECU has been professionally prepared as VIRGIN Plug & Play, allowing automatic synchronization with the vehicle and immobilizer after installation.

    Application of engine ECU 51840854B

    • Brand: Fiat
    • Model: Fiat 500
    • Engine: 1.2 8V petrol
    • Engine capacity: 1242 cm³
    • Engine code: 169A4000
    • Model years: approximately 2007–2015
    • Manufacturer: Bosch
    • ECU type: engine ECU
    • Version: VIRGIN Plug & Play

    Part numbers for comparison

    • 51840854B
    • 51840854
    • 0261201759
    • 0 261 201 759

    The ECU should always be matched primarily by part number. Different ECU versions were installed in Fiat 500 models, therefore compatibility must be confirmed using 51840854B and 0261201759.

    51840854B module prepared as VIRGIN Plug & Play – what does it mean?

    The offered ECU has been prepared as VIRGIN, meaning all data from the previous vehicle has been removed. After installation, the module automatically programs itself to the vehicle and immobilizer, eliminating the need to clone the original ECU.

    Typical faults of Fiat 500 0261201759 ECU

    • engine does not start,
    • CODE warning light or immobilizer errors,
    • no communication with ECU,
    • rough running of the 1.2 8V engine,
    • vehicle stalls while driving,
    • ignition or fuel injection control problems,
    • faults caused by short circuit or liquid damage,
    • no control of ignition coils.

    Tested ECU with warranty

    Every 51840854B Bosch 0261201759 engine ECU is individually tested and verified before shipping. The module is supplied with warranty and prepared for installation in the vehicle.

    FAQ – Fiat 500 engine ECU 51840854B 0261201759

    Does ECU 51840854B fit Fiat 500 1.2 8V?

    Yes, the 51840854B ECU is used in selected Fiat 500 models equipped with the 1.2 8V petrol engine. Matching the exact ECU number is essential.

    What does VIRGIN Plug & Play mean in Fiat 500 ECU?

    VIRGIN Plug & Play means the ECU has been reset and after installation automatically adapts itself to the vehicle and immobilizer.

    Does Bosch ECU 0261201759 require coding?

    No. The offered 0261201759 ECU has been prepared as VIRGIN Plug & Play and automatically adapts to the vehicle after installation.

    What are the symptoms of faulty Fiat 500 ECU 51840854?

    A defective 51840854 ECU may cause no start condition, immobilizer errors, lack of diagnostic communication or unstable engine operation.

    Is ECU 0261201759 tested before sale?

    Yes, every Bosch 0261201759 ECU is individually tested before shipping and covered by warranty.

    Can ECU 51840854B be matched only by vehicle model?

    No. The ECU should always be matched using part numbers 51840854B and 0261201759, because different ECU versions exist in Fiat 500 models.

    Does Fiat 500 VIRGIN ECU solve immobilizer problems?

    Yes, the VIRGIN Plug & Play version allows automatic synchronization with the vehicle immobilizer after installation.

    Reviews

    Number of ratings: 0
    Rate and review

    Related Products

      Automotive Electronics Manufacturers

      ECU Engine Controllers, ABS Pumps, BCM Modules and automotive electronics.

      Bosch - ECU Engine Controllers and automotive electronics Magneti Marelli - ECU Engine Controllers and BCM Modules Delphi - ECU Engine Controllers and automotive electronics Continental - SID and PCR ECU Engine Controllers Visteon - ECU Engine Controllers for Ducato Boxer Jumper ATE - ABS Pumps and ABS Modules FPT - Multijet and JTD ECU Engine Controllers Siemens - Engine and Transmission Control Units FoMoCo - Ford ECU Engine Controllers

      Blog about ECU Engine Controllers and Automotive Electronics
      Go to the Blog

      • ECU engine controller and ABS pump manufacturers – how to choose Bosch, Delphi, Continental, Magneti Marelli, Siemens, FoMoCo, Visteon and ATE

        Basic Information 02-07-2026

        Most popular automotive electronics brands – how to choose the right module?

        On the ECUSale blog, we have prepared a practical guide to the most popular automotive electronics manufacturers, such as Bosch, Delphi, Continental, Magneti Marelli, Siemens, FoMoCo, Visteon, ATE and FPT. We explain which engine ECU controllers, ABS pumps, BCM, BSI, BSM modules and gearbox controllers are commonly found under specific brands.

        You will also learn why the most important details when choosing a replacement part are the ECU part number, OEM number, HW/SW version and vehicle configuration, not only the module’s appearance or manufacturer brand. We also explain when cloning, a Virgin version, Plug & Play preparation or IMMO OFF may be required.

        Read the guide about ECU controller and ABS pump manufacturers

        Read more
        EcuSale 0

      • Audi Q7 3.0 TDI Water Damaged Engine ECU| 4L1910401D & 4L0910401G IMMO OFF Plug & Play

        Basic Information 22-05-2026

        Audi Q7 3.0 TDI won’t start after heavy rain? The engine ECU could be water damaged

        One of the most common failures in the Audi Q7 3.0 TDI is water damage affecting the Bosch EDC17CP04 engine ECU. This issue frequently impacts units 0281015868 and 0281014174, which are mounted beneath the windscreen scuttle panel, an area highly exposed to moisture and blocked drainage channels that can lead to corrosion inside the ECU.

        In this article, we explain the typical symptoms of a failed Audi Q7 3.0 TDI engine control unit, when ECU cloning is still possible, and why in many situations an IMMO OFF Plug & Play solution is the fastest and most reliable repair option.

        0281015868 & 0281014174 – common ECU failures in the Audi Q7 3.0 TDI

        Learn why engine ECUs such as 4L1910401D and 4L0910401G are especially vulnerable to water ingress, which fault codes usually appear during diagnostics, and how professional ECU repair or replacement is performed for the Audi Q7 3.0 TDI.

        Read more
        EcuSale 0

        Manufacturers of ECU Engine Controllers and Automotive Electronics

        ECU Engine Controllers, ABS Pumps, BCM Modules, BSI Modules, Body Computers, Transmission Control Units and automotive electronics from the most popular manufacturers available at ECUSALE.

        FAQ – Frequently Asked Questions

        1. Are the products tested before shipping?

        Yes, every ECU engine controller, BSI module, BCM module, ABS module, transmission control unit, and other automotive electronic module is electronically tested before shipment. Each unit is checked for proper communication and correct operation to ensure you receive a fully tested product ready for installation.

        2. Does the ECU engine controller require programming or coding after installation?

        Whether programming or coding is required depends on the version of the product. We offer VIRGIN, IMMO OFF, and Plug & Play ECU engine controllers. Information about any required programming or coding is always clearly stated in the product description. In many cases, the unit can be installed and used without any additional coding or adaptation.

        3. How do I choose the correct part for my vehicle?

        The most important step is to compare the part numbers found on your original unit. Pay special attention to the Bosch, Siemens, Magneti Marelli, Continental, or vehicle manufacturer's OEM part number. If you are unsure, simply send us a photo of your existing module or provide your vehicle's VIN, and our specialists will help you identify the correct part.

        4. Are the products covered by a warranty?

        Yes, all ECU engine controllers, ABS modules, BCM modules, BSI modules, transmission control units, and other automotive electronic modules offered in our store are covered by a warranty. Every product is carefully tested and prepared before shipment. If you experience any issues, our technical support team is available to assist with diagnostics and help resolve the problem quickly and efficiently.

        5. What payment methods are available in the store?

        We offer secure online payments processed through Stripe and PayPal. Customers can pay using a credit or debit card, Apple Pay, Google Pay, Klarna, online banking payments, or a traditional bank transfer. After placing an order, you will receive a secure payment link to complete your purchase safely and conveniently.

        FAQ – Frequently Asked Questions

        1. Are the products tested before shipping?

        Yes, every ECU engine controller, BSI module, BCM module, ABS module, transmission control unit, and other automotive electronic module is electronically tested before shipment. Each unit is checked for proper communication and correct operation to ensure you receive a fully tested product ready for installation.

        2. Does the ECU engine controller require programming or coding after installation?

        Whether programming or coding is required depends on the version of the product. We offer VIRGIN, IMMO OFF, and Plug & Play ECU engine controllers. Information about any required programming or coding is always clearly stated in the product description. In many cases, the unit can be installed and used without any additional coding or adaptation.

        3. How do I choose the correct part for my vehicle?

        The most important step is to compare the part numbers found on your original unit. Pay special attention to the Bosch, Siemens, Magneti Marelli, Continental, or vehicle manufacturer's OEM part number. If you are unsure, simply send us a photo of your existing module or provide your vehicle's VIN, and our specialists will help you identify the correct part.

        4. Are the products covered by a warranty?

        Yes, all ECU engine controllers, ABS modules, BCM modules, BSI modules, transmission control units, and other automotive electronic modules offered in our store are covered by a warranty. Every product is carefully tested and prepared before shipment. If you experience any issues, our technical support team is available to assist with diagnostics and help resolve the problem quickly and efficiently.

        5. What payment methods are available in the store?

        We offer secure online payments processed through Stripe and PayPal. Customers can pay using a credit or debit card, Apple Pay, Google Pay, Klarna, online banking payments, or a traditional bank transfer. After placing an order, you will receive a secure payment link to complete your purchase safely and conveniently.