What to know about ECU 55594704 WT
On this page you can buy a Denso MB275700-3790 engine control unit for the Opel Astra / Zafira with the 1.7 CDTI engine (A17DTJ / A17DTR). It is a Virgin version – the Car Pass (PIN) code is reset. The unit has been refreshed and the housing refurbished – the electronics have never been repaired.
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.
Programming and fitting
- Virgin – Car Pass (PIN) reset: after fitting, the ECU is programmed in the car with Tech-2 or OP-COM.
- Cloning included in the price: send us the EEPROM and FLASH files from your ECU, or the whole ECU – we read the data and return both units.
- Paid extras: EGR OFF, tuning and – on versions with a DPF – DPF OFF.
- Warranty: 6 months.
Vehicle compatibility
The ECU fits the Opel Astra / Zafira with the 1.7 CDTI engine (A17DTJ / A17DTR). Compatibility is decided by the label number (55594704 WT / 55594704WT), not just by the model and year.
Label details
- Opel / GM number: 55594704
- Letter code: WT (55594704WT)
- Denso number: MB275700-3790
- ECU type: Denso 1.7 CDTI
- Engine code: A17DTJ / A17DTR
Compare them with the label on your own ECU.
Other Opel 1.7 CDTI ECU numbers
See also the article Opel 1.7 CDTI Denso ECUs – Astra H, Zafira, Corsa. Looking for a number other than 55594704 WT? Browse the Opel engine ECUs category or the Denso manufacturer page.
Frequently asked questions about ECU 55594704 WT
Where is the ECU on an Opel 1.7 CDTI?
In the left front wheel arch next to the bumper, close to the ground – which is why it is exposed to rain, road spray and snow.
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How does cloning ECU 55594704 WT work?
You send us the EEPROM and FLASH files from your ECU or the whole ECU, and we read the data and return both units. Cloning is included in the price.
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How do I program ECU 55594704 WT?
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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How do I check that 55594704 WT fits my Opel Astra / Zafira?
Look at the label on your ECU – it must show the number 55594704 WT (55594704WT). The model and year alone are not enough.
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