Manufacturer: VAG (VW, Audi, Skoda, Seat)
Brand: Siemens
Model: SIMOS 3xx
Function: Immo off
Emulator: No
Immo off for Siemens Simos 3xx ECU: VW, Audi, Skoda & Seat Models
The Siemens Simos 3xx ECU series is widely used in various Volkswagen Audi Group (VAG) vehicles, including compact and mid-sized models. These ECUs frequently encounter immobilizer-related issues that may prevent engine start or trigger dashboard warnings like “Immobilizer Active.”
At CKECU, we specialize in immo off services specifically for Siemens Simos 3xx units. Whether you’re working on a daily driver or restoring a classic, our immobilizer deactivation ensures stable performance and eliminates recurring IMMO errors permanently.
We offer tested immo off solutions, using safe EEPROM or flash-based methods to ensure reliability and ECU integrity.
If you’re looking for immobilizer removal on a broader range of VAG Group ECUs, explore our dedicated page for Vag Immo Off solutions.
SIMOS 3xx series: supported vehicle models
The Siemens Simos 3xx ECU series has been confirmed in the following VAG vehicles:
- Volkswagen
- Polo
- Golf III & IV
- Passat
- Audi
- A3 8L
- A4 B5
- Skoda
- Octavia I
- Seat
- Ibiza 6K
- Toledo 1M
- Cordoba 6K
How to immo off Siemens SIMOS 3xx
Conducting an immobilizer procedure with our immo off software, CK Decode, involves a few basic steps:
- Download CKDecode through this link
- Click on the Functions Tab and select VAG (VW, Audi, Skoda, Seat) – Siemens – SIMOS 3xx – Immo off
- Read EEPROM with your interface and upload the file
- Click Process button
- Write the file processed by CKDecode
Some supported models:
- Simoms 3.3A
- Simoms 3.4A
- Simoms 3PA
- Simoms 3PB
- Simoms 3PC
- Simoms 3PD
- Simoms 3PE
- Simoms 3PG
