Bosch ME3.8 Immo Off
Immo Off on the Bosch ME3.8 control unit for your vehicle. Upload the dump — free analysis and check; apply the operation and download the ready file in your portal account.
Disabling the immobilizer in the ECU firmware — the engine starts without binding to a key and BCM.
| Operation | Immo Off |
|---|---|
| Control unit | Bosch ME3.8 |
| Access / memory | EXT EEPROM |
| Method | Online, from the ECU memory dump (.bin) |
| Applicability check | Free |
| Checksums | Recalculated automatically |
| Result | A ready file to write to the unit |
Bosch ME3.8 Immo Off
Immo Off is disabling the immobilizer right in the engine control unit's firmware. After the operation the ECU stops checking the key tag against the BCM, CAS or EWS and starts the engine without binding to the car.
When you need Immo Off
- Installing a used (donor) unit — an ECU from another car is not matched to your key and BCM.
- Lost or broken keys — you need to start the engine while keys are being restored.
- Board repair or processor replacement — after servicing, the immobilizer binding is lost.
- Moving the ECU to a bench — starting the engine outside the car, without the factory security system.
What you get: the unit starts the engine without the immobilizer — the key tag and BCM are no longer checked.
For the Bosch ME3.8 block the «Immo Off» operation runs online from the ECU memory dump (access — EXT EEPROM). Read the file via OBD, Bench or Boot and upload it — the system detects Bosch ME3.8 and checks whether the operation applies for free. You'll get the ready file with recalculated checksums in your portal account.
Frequently asked questions
Immo Off on Bosch ME3.8 — short and to the point
What does Immo Off do on Bosch ME3.8?
Disabling the immobilizer in the ECU firmware — the engine starts without binding to a key and BCM.
Which file should I upload?
The ECU memory dump (access EXT EEPROM), read via OBD, Bench or Boot. Upload the file — the system detects Bosch ME3.8 for free and checks whether the operation applies.
How much does Immo Off cost?
Uploading and analyzing the file is free. Applying the operation and downloading the ready file happen in your portal account (40 €).
Are the checksums recalculated?
Yes, automatically. The ready file is immediately writable to the unit — no need to recalculate checksums by hand.