Bosch MED17.1.6 Immo Off: VAG (Audi · Porsche · Volkswagen)
Immo Off on the Bosch MED17.1.6 on the TC1797 processor control unit for vehicles of the VAG group: Audi, Porsche, Volkswagen. 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 MED17.1.6 |
| Car makes | VAG — Audi, Porsche, Volkswagen |
| Processor (MCU) | TC1797 |
| Access / memory | INT EEPROM [TC1797] |
| INT FLASH | TC1797 |
| INT EEPROM | TC1797 |
| Method | Online, from the ECU memory dump (.bin) |
| Applicability check | Free |
| Checksums | Recalculated automatically |
| Result | A ready file to write to the unit |
Bosch MED17.1.6 Immo Off — 20 vehicles
Operation Immo Off is supported for the Bosch MED17.1.6 block on vehicles of the VAG group (Audi, Porsche, Volkswagen). In the list: Volkswagen Phaeton, Porsche Cayenne, Audi A8, Volkswagen Passat, Porsche Cayenne E-Hybrid, Volkswagen Passat Variant, Porsche Cayenne S Hybrid, Volkswagen Touareg and 12 more variants. Upload the dump — the system detects the version and checks applicability for free.
| Make | Model | Version | Year |
|---|---|---|---|
| Volkswagen | Phaeton | 3.0 V6 FSI 6AT | 2013 |
| Porsche | Cayenne | 3.6 VR6 8AT | 2015 |
| Audi | A8 | 6.3 W12 FSI Quattro Tiptronic 8AT | 2014 |
| Volkswagen | Passat | 3.6 VR6 4Motion 6AT | 2012 |
| Porsche | Cayenne E-Hybrid | 3.0 V6 8AT | 2014 |
| Volkswagen | Passat Variant | 3.6 VR6 4Motion 6AT | 2012 |
| Porsche | Cayenne S Hybrid | 3.0 V6 8AT | 2010 |
| Volkswagen | Touareg | 3.6 V6 FSI 8AT | 2014 |
| Porsche | Panamera S E-Hybrid | 3.0 V6 8AT | 2013 |
| Volkswagen | CC | 3.6 V6 4Motion 6AT | 2012 |
| Porsche | Panamera S Hybrid | 3.0 V6 8AT | 2011 |
| Porsche | Cayenne | 3.6 VR6 6MT | 2010 |
| Porsche | Cayenne | 3.6 VR6 6MT | 2012 |
| Porsche | Cayenne | 3.6 VR6 8AT | 2010 |
| Porsche | Cayenne | 3.6 VR6 8AT | 2012 |
| Volkswagen | Passat | 3.6 VR6 4Motion 6AT | 2010 |
| Volkswagen | Passat Variant | 3.6 VR6 4Motion 6AT | 2010 |
| Volkswagen | Phaeton | 3.0 V6 FSI 6AT | 2011 |
| Volkswagen | Phaeton | 3.0 V6 FSI 6AT | 2012 |
| Volkswagen | Touareg | 3.6 V6 FSI 8AT | 2010 |
Bosch MED17.1.6 Immo Off — for VAG (Audi, Porsche, Volkswagen)
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 MED17.1.6 memory and reading
The Bosch MED17.1.6 unit uses on the TC1797 processor the following: INT FLASH — TC1797, INT EEPROM — TC1797. The Immo Off operation works on the INT EEPROM [TC1797] 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 MED17.1.6 block on the TC1797 processor the «Immo Off» operation runs online from the ECU memory dump (access — INT EEPROM [TC1797]). Read the file via OBD, Bench or Boot and upload it — the system detects Bosch MED17.1.6 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 MED17.1.6 — short and to the point
What does Immo Off do on Bosch MED17.1.6?
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 INT EEPROM [TC1797]), read via OBD, Bench or Boot. Upload the file — the system detects Bosch MED17.1.6 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 (50 €).
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 MED17.1.6 with the Immo Off operation covers VAG group vehicles (Audi, Porsche, Volkswagen). The system detects the exact version from the uploaded dump.
What memory and processor does Bosch MED17.1.6 use?
The unit is built around the TC1797 processor. Memory of the unit: INT FLASH — TC1797, INT EEPROM — TC1797. The Immo Off operation needs INT EEPROM [TC1797] access.