51840854B 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.