How to choose ECU 55590156 WJ
This is a Denso MB275800-8136 engine control unit for the Opel Astra / Zafira with the 1.7 CDTI engine. It is a Virgin version with the Car Pass (PIN) code reset and is ready to fit. The unit has been refreshed and the housing refurbished – the electronics have never been repaired.
Matching by part number
- Application: the Opel Astra / Zafira with the 1.7 CDTI engine.
- Number to compare: 55590156 WJ (55590156WJ).
- Model and year do not decide compatibility – the label does.
Before fitting
Virgin means the Car Pass (PIN) code is reset – after fitting, the ECU is programmed in the car with Tech-2 or OP-COM.
- data cloning (the EEPROM and FLASH files or the whole ECU) – included in the price, we return both units,
- EGR OFF, tuning, DPF OFF (on versions with a DPF) – for an extra charge,
- warranty – 6 months.
Numbers to compare
These are the markings that matter when matching the ECU:
- Opel / GM number: 55590156
- Letter code: WJ (55590156WJ)
- Denso number: MB275800-8136
- ECU type: Denso 1.7 CDTI
Mounting position and failures
On the 1.7 CDTI the Denso ECU sits in the left wheel arch, right next to the front bumper and close to the ground. Over time rain, road spray and snow damage it, which shows up as starting problems, injector control faults, uneven running and misfires. Confirm the fault with a diagnosis before buying.
See other Denso 1.7 CDTI numbers
See also the article Opel 1.7 CDTI Denso ECUs – Astra H, Zafira, Corsa. Other part numbers are in the Opel engine ECUs category, and Denso units are on the manufacturer page.
Questions and answers: 55590156 WJ
How do I program ECU 55590156 WJ?
The ECU is a Virgin version with the Car Pass (PIN) code reset. After fitting it is programmed in the car with Tech-2 or OP-COM.
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What does the Virgin version mean?
The Car Pass (PIN) code is reset, so the ECU can be programmed in the car.
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How do I check that 55590156 WJ fits my Opel Astra / Zafira?
Look at the label on your ECU – it must show the number 55590156 WJ (55590156WJ). The model and year alone are not enough.
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Why do Denso 1.7 CDTI ECUs fail?
They sit in the left front wheel arch next to the bumper, close to the ground, so rain, road spray and snow damage them.
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