Continental SIMOS 12.1 and 12.2 are the Engine Control Modules used in 1.8/2.0 petrol engines mounted in:
- Audi: A3, A4, A5, S3, Q5, TT
- Volkswagen: Jetta, Passat
Technical details
| MCU | Program Flash | Data Flash |
|---|---|---|
| Tricore TC1797 | 4MB | 64KB |
Available services
SIMOS 12.x IMMO-OFF
Disables the immobiliser in the ECU.
SIMOS 12.x clone
Creates a full clone, including calibration, software/coding/adaptation and full IMMO data.
SIMOS 12.x transfer
Allows complete transfer of IMMO data between SIMOS 12.x and MEDC17. Commonly used during engine conversions or swaps where the replacement ECU differs from the original unit. Supports both directions:
BCM2-SIMOS 12.1 synchronization
Synchronises SIMOS 12.1 with the vehicle’s BCM2 module. Required after ECU replacement, mismatch or when restoring immobiliser pairing.
Part numbers
All SIMOS 12.x part numbers are supported for IMMO-OFF, cloning and transfer services. The list below shows the most common variants:
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Notes
- 🔧 Full bench/boot read is required.
- ⚠️ Virtual/partial reads are not supported.
- ⚠️ Partially encrypted reads require MCU ID.
- ✅ Full checksum correction is included.