Bosch M3.2 Immo Off: Audi
Immo Off on the Bosch M3.2 control unit for vehicles Audi. 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 M3.2 |
| Car makes | Audi |
| Access / memory | EXT EEPROM [24C02] |
| EXT EEPROM | 24C02 |
| Method | Online, from the ECU memory dump (.bin) |
| Applicability check | Free |
| Checksums | Recalculated automatically |
| Result | A ready file to write to the unit |
Bosch M3.2 Immo Off — 6 vehicles
Operation Immo Off is supported for the Bosch M3.2 block on vehicles Audi. In the list: Audi A4, Audi A6. Upload the dump — the system detects the version and checks applicability for free.
| Make | Model | Version | Year |
|---|---|---|---|
| Audi | A4 | 1.8 T Tiptronic | 1994 |
| Audi | A6 | 1.8 20v Quattro | 1995 |
| Audi | A4 | 1.8 T | 1994 |
| Audi | A4 | 1.8 T Quattro | 1994 |
| Audi | A6 | 1.8 20v | 1995 |
| Audi | A6 | 1.8 20v Automatic | 1995 |
Bosch M3.2 Immo Off — for Audi
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.
Bosch M3.2 memory and reading
The Bosch M3.2 unit uses the following: EXT EEPROM — 24C02. The Immo Off operation works on the EXT EEPROM [24C02] area — that is the one to read out and upload. If OBD reading is not available for this unit, the dump is taken on the bench via Bench or Boot mode.
For the Bosch M3.2 block the «Immo Off» operation runs online from the ECU memory dump (access — EXT EEPROM [24C02]). Read the file via OBD, Bench or Boot and upload it — the system detects Bosch M3.2 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 M3.2 — short and to the point
What does Immo Off do on Bosch M3.2?
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 [24C02]), read via OBD, Bench or Boot. Upload the file — the system detects Bosch M3.2 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.
Which vehicles is it for?
Bosch M3.2 with the Immo Off operation covers Audi. The system detects the exact version from the uploaded dump.
What memory and processor does Bosch M3.2 use?
Memory of the unit: EXT EEPROM — 24C02. The Immo Off operation needs EXT EEPROM [24C02] access.