55571776 NF – Denso MB275800-9540 ECU in Virgin version
Denso MB275800-9540 module for the Opel Astra H with the 1.7 CDTI engine with the Car Pass (PIN) code reset. The unit has been refreshed and the housing refurbished – the electronics have never been repaired. It just needs fitting and programming in the car.
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.
Label details
- Opel / GM number: 55571776
- Letter code: NF (55571776NF)
- Denso number: MB275800-9540
- ECU type: Denso 1.7 CDTI
Compare them with the label on your own ECU.
Typical failure symptoms
- starting problems,
- injector control faults,
- uneven running and misfires.
The cause is usually the mounting position – the left front wheel arch next to the bumper, close to the ground, where rain, road spray and snow damage the ECU. Run a diagnosis before buying.
Matching by part number
- Application: the Opel Astra H with the 1.7 CDTI engine.
- Number to compare: 55571776 NF (55571776NF).
- Model and year do not decide compatibility – the label does.
Similar Denso 1.7 CDTI ECUs
We describe Denso 1.7 CDTI ECUs in detail on our blog: 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.
Frequently asked questions about ECU 55571776 NF
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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Does ECU 55571776 NF come with a warranty?
Yes – 6 months.
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How do I check that 55571776 NF fits my Opel Astra H?
Look at the label on your ECU – it must show the number 55571776 NF (55571776NF). The model and year alone are not enough.
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What do I program ECU 55571776 NF with?
With Tech-2 or OP-COM, after fitting it in the car. The Car Pass (PIN) code is reset.
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