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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

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

Manufacturer: BOSCH (go to products)

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Individual variants may differ in price

English €
with VAT without VAT
Price €208.50

Shipping costs are not included in the price.

Availability:
available
Shipping from €41.70 - UPS express delivery around world (Afghanistan)

express delivery 3-6 days
Shipping time: 48 hours

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.

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💳 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.

Technical specifications

  • Vehicle Make and Model FIAT 500
  • Engine type 1.4
  • OEM Part Number 51840854B 0261201759
  • Manufacturer Part Number 51840854
  • PLUG AND PLAY VIRGIN
  • Condition Second hand product
  • Warranty 6 MONTH
  • Payment Methods Credit Card , Bank Transfer , PayPal
  • Express Delivery within the EU European Union 2-3 working days
  • International Delivery Outside the EU 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.

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        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.

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