028 906 021 GL epprom immo off file

bluen47 said:

Hello im looking epprom file with immo off, but can be the ori file thanks.

Click to expand...

You need to provide more details before anyone can help. Please share:

• Full ECU part number (you mention 028 906 021 GL — is that the exact number from the ECU label?)
• ECU type/brand (e.g., Bosch EDC15, Simos, etc.)
• Vehicle model, engine code, and year
• What tool did you use to read the EEPROM (e.g., VVDI Prog, Orange5, UPA, TNM, etc.)?
• Is this a separate EEPROM chip read, or a full flash read?
• Can you upload the file you already have so we can take a look?

With the part number 028 906 021 GL this looks like a VW/Seat/Skoda with a diesel engine (likely 1.9 TDI) running a Bosch EDC15 ECU. If that's the case, the IMMO data is stored in the external EEPROM (usually a 93C86 or 24C02 chip).

To disable IMMO in the EEPROM, the exact content of your EEPROM dump is needed — a generic "ori" file from another ECU won't work because the EEPROM contains data specific to your unit (coding, adaptation values, etc.).

Please upload your EEPROM read and confirm the details above.

I have no file my chip is empty.

bluen47 said:

I have no file my chip is empty.

Click to expand...

If your EEPROM chip is empty (erased/blank), then you need a virgin/clean EEPROM file specifically for 028 906 021 GL to get the ECU running again.

Before anyone can help, please confirm:

• What is the Bosch number on the ECU label? (e.g., 0 281 010 xxx)
• What is the EEPROM chip type? (e.g., 93C86, 24C02, 95040, etc.)
• What vehicle, engine code, and year?
• What tool are you using to read/write the EEPROM?
• Is the flash (main IC) still intact, or is that also empty?

This is important because:

• The EEPROM content must match the flash/software version in the main processor. A mismatched EEPROM will not work.
• If the flash is also empty, you'll need both flash + EEPROM files that match each other.
• A virgin EEPROM with IMMO off means the ECU will start the engine without any key synchronization — but it must correspond to the correct Bosch HW/SW number.

Please check the full ECU label and share all the numbers you can find on it.

0281001655/656
24c02
VW Passat B5 1.9TDI AFN 110
Main ic empty too

bluen47 said:

0281001655/656
24c02
VW Passat B5 1.9TDI AFN 110
Main ic empty too

Click to expand...

OK so both the flash and the EEPROM are empty — you essentially need a full ECU recovery. Here's what you need to know:

Your ECU details:

• VW Part: 028 906 021 GL
• Bosch: 0 281 001 655/656
• ECU type: Bosch EDC15V
• EEPROM: 24C02
• Engine: 1.9 TDI AFN 110hp
• Vehicle: VW Passat B5

What you need:

• Flash file — the main firmware for the flash IC (usually 29F400 or similar). This must match the Bosch number 0 281 001 655 or 656.
• EEPROM file — a matching 24C02 dump (256 bytes) for that software version, ideally virgin with IMMO off.

Important:

• Flash and EEPROM must match each other. You cannot use a random EEPROM with a different flash version — the ECU will not work.
• The Bosch number ending 655 vs 656 matters — check your label carefully and confirm which one it is exactly.
• What is the main flash IC chip type? (Check the marking on the chip — e.g., AM29F400, MBM29F400, etc.)

Your options:

1. Find a donor file set — someone with the same ECU (same Bosch number, same VW part number) who can share a full flash + EEPROM pair. Then раtсh IMMO off in the EEPROM.
2. Buy a working used ECU with the same part number, read both flash and EEPROM from it, then clone to your unit and disable IMMO.
3. Send the ECU to a specialist who has a file database for EDC15V — they can reprogram both chips and disable IMMO.

Please confirm the exact Bosch number (655 or 656) and the flash chip type, and I'll try to help further.

Number on the sticker is 0 281 001 655/656

bluen47 said:

Number on the sticker is 0 281 001 655/656

Click to expand...

If the sticker literally says 0 281 001 655/656, that means the same hardware was produced in two variants. You need to determine which one yours actually is.

How to identify your exact version:

1. Look at the main flash chip on the PCB — what is the exact marking on it? (e.g., AM29F400BB, MBM29F400, etc.)
2. Is there any other sticker or laser marking on the PCB itself (not the outer label) that says 655 or 656?
3. Check if there is a software number on the label — something like "023 906 021 xx" with a letter suffix, or a Bosch software number starting with "0 281 00x xxx"

Why this matters:

655 and 656 use different flash firmware. If you write the wrong flash file, the ECU will not function. With both chips empty, there is no way to auto-detect — you must identify it from the hardware.

What to do right now:

1. Open the ECU
2. Take clear photos of both sides of the PCB
3. Photo the main flash IC chip marking
4. Photo the EEPROM chip (24C02) marking
5. Photo any markings/stickers on the PCB
6. Post them here

With the photos we can identify exactly which variant you have (655 or 656), confirm the flash chip type, and then find the correct matching flash + EEPROM file pair with IMMO off.

Without this, writing the wrong file could leave you in the same situation — a dead ECU.

I found ori file. Thanks for everybody.