55571557 MT 5WK9430 VIRGIN – ECU ENGINE CONTROLLER Opel Astra H, Zafira B, Meriva | ready for Tech-2 / OP-COM programming
55571557 MT 5WK9430 is an original ECU ENGINE CONTROLLER used in selected Opel vehicles. The offered unit has been prepared in VIRGIN / RESET condition, which means the immobilizer memory has been cleared and the module is ready for re-assignment and adaptation in the vehicle. This solution is intended for customers looking for a tested controller to replace a faulty unit and who want to perform correct programming using Tech-2 or OP-COM devices.
VIRGIN version – what does it mean?
The offered 55571557 MT has been prepared as VIRGIN, meaning a reset ECU. It is not a random used module “from a car”, but a controller prepared for reprogramming in another vehicle. After installation, it requires a programming procedure and pairing with the car using appropriate diagnostic equipment.
In practice, this means that:
- the controller is cleared of previous data,
- it is ready for adaptation in another vehicle,
- it requires programming using Tech-2 or OP-COM,
- after proper coding, it can operate as a correctly matched module for the vehicle.
This is a good solution for workshops, mechanics, and customers who want to replace a faulty Opel ECU ENGINE CONTROLLER 55571557 5WK9430 with a professionally prepared unit while maintaining the ability for correct adaptation to the car.
Main ECU numbers
- OEM / GM: 55571557 MT
- Manufacturer number: 5WK9430
- Type: petrol engine controller
- Condition: VIRGIN / RESET
- Programming: Tech-2 / OP-COM
Compatibility – which vehicles can 55571557 MT 5WK9430 fit?
Compatibility must always be confirmed by the part number visible on the label of the original ECU. In automotive electronics, the correct part number is more important than the vehicle model or engine size alone.
The 55571557 MT / 5WK9430 ECU is found in Opel vehicles such as:
- Opel Astra H
- Opel Zafira B
- Opel Meriva – in selected versions
It is most commonly used in 1.8 16V petrol engines. Depending on market version, production year, and configuration, it may be associated with engine codes such as:
Typical application of 55571557 MT 5WK9430 includes vehicles produced approximately in:
- Opel Astra H – around 2004–2010
- Opel Zafira B – around 2005–2014
- Opel Meriva – depending on version and ECU number
If your current module has exactly 55571557 MT and 5WK9430, this is the correct basis for selection. In practice, this provides the highest chance of proper compatibility after programming.
Symptoms of a faulty 55571557 MT 5WK9430 ECU
A faulty Opel Astra H 1.8 16V ECU, Opel Zafira B 1.8 ECU, or a module with number 5WK9430 may cause various issues, including:
- engine not starting,
- irregular engine operation,
- no communication with diagnostics,
- immobilizer or programming-related errors,
- loss of engine component control,
- intermittent stalling or no reaction when turning the ignition.
In such cases, replacing it with a tested and prepared 55571557 MT VIRGIN ECU ENGINE CONTROLLER is often the best solution, provided that the part number matches and proper adaptation is performed.
FAQ – frequently asked questions
Does 55571557 MT 5WK9430 fit Opel Astra H 1.8 16V?
If your car has exactly the same numbers 55571557 MT and 5WK9430, then it is the correct unit. Compatibility should always be confirmed by the ECU label, not only by the vehicle model.
Which Opel models use 5WK9430 55571557 MT?
This number is mainly found in Opel Astra H, Opel Zafira B, and selected versions of Opel Meriva, typically with 1.8 16V petrol engines.
Is 55571557 MT a Plug & Play ECU?
No. This unit is supplied in VIRGIN / RESET condition and requires programming and pairing with the vehicle using Tech-2 or OP-COM.
How to program Opel ECU 55571557 MT after installation?
After installation, the ECU must be paired with the vehicle using diagnostic equipment such as Tech-2 or OP-COM. The procedure must be carried out according to the vehicle configuration.
Is 5WK9430 suitable for Opel Zafira B 1.8 petrol?
Yes, this number is commonly used in Opel Zafira B 1.8 16V, but final confirmation should always be based on matching the ECU part number.
55571557 MT 5WK9430 – which engine is it for?
This ECU is most often associated with 1.8 16V petrol engines, including codes A18XER and Z18XER. However, the exact part number remains the key factor.
Can Opel Astra H 55571557 ECU be installed in another car?
Only if the part number matches and the ECU is properly programmed. Vehicle model compatibility alone is not sufficient.
Does 5WK9430 for Meriva require coding?
Yes. The VIRGIN version requires programming and adaptation after installation.
How to check if 55571557 MT fits my Opel 1.8?
The best way is to compare the number from your original ECU. If it matches 55571557 MT and 5WK9430, it is the correct unit.
Is Opel Zafira B 55571557 ECU tested before sale?
Yes. The unit is fully tested, covered by warranty, and prepared for programming.
Opel Astra H 1.8 ECU 55571557 MT – will the car start after replacement?
After proper installation and programming, the ECU can work correctly. Key factors are matching part number and correct adaptation.
Is 55571557 5WK9430 suitable to replace a faulty ECU in Opel Zafira 1.8?
Yes, if the faulty ECU has the same number. The part number is more important than the vehicle model or engine size.
