SIMOS 12.x

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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

MCUProgram FlashData Flash
Tricore TC17974MB64KB

Available services

VAG SIMOS 12.x immo-off

SIMOS 12.x IMMO-OFF

Disables the immobiliser in the ECU.

Order IMMO-OFF for SIMOS 12.x
VAG SIMOS 12.x clone

SIMOS 12.x clone

Creates a full ECU clone, including calibration, software/coding/adaptation and full IMMO data.

Order cloning for SIMOS 12.x

SIMOS 12.x transfer

Allows complete transfer of IMMO data between different ECU families and ECU models. Commonly used during engine conversions or swaps where the replacement ECU differs from the original unit.

VAG SIMOS 12.x to SIMOS immo transfer

SIMOS 12.x to SIMOS

Transfer from SIMOS 12.x to another SIMOS ECU.

Order transfer to SIMOS
VAG SIMOS 12.x to MEDC17 immo transfer

SIMOS 12.x to MEDC17

Transfer from SIMOS 12.x to MEDC17 ECU.

Order transfer to MEDC17

SIMOS 12.1 synchronization

Synchronizes the ECU with the vehicle’s immo master module to restore proper immo operation. Required after ECU replacement, module mismatch or when restoring immo pairing.

VAG SIMOS 12.1 with BCM2 sync

SIMOS 12.1 with BCM2

Synchronizes SIMOS 12.1 with the BCM2.

Order BCM2 synchronization

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:

Notes

  • 🔧 Full bench/boot read is required.
  • ⚠️ Virtual/partial reads are not supported.
  • ⚠️ Partially encrypted reads require MCU ID.
  • ✅ Full checksum correction is included.

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