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PCR2.1 IMMO OFF · VAG ECUs · DSG TEMIC

PCR2.1 IMMO OFF and VAG IMMO OFF Solutions for MED17 / EDC17 / SIMOS / DSG

Our PCR2.1 IMMO OFF and VAG IMMO OFF solutions cover PCR2.1, MED17 / EDC17, SIMOS ECUs
and DSG TEMIC TCUs with EEPROM and FLASH based immobilizer removal. These services are designed for ECU
replacement and engine swaps, providing total immo off with automatic checksum correction where supported.

Platform focus: PCR2.1 + VAG MED17 / EDC17 / SIMOS
Use cases: ECU replacement · engine swap · motorsport/off-road

HIGHLIGHT: PCR2.1 & KEY VAG ECUs

  • PCR2.1 IMMO OFF (flash-based solution)
  • AUDI RS3 2.5T MED17.1.62 IMMO OFF
  • VW E-GOLF 2016–2021 IMMO OFF
  • EDC17C74 IMMO OFF (new generation)
  • MED17 / EDC17 WFS5 IMMO OFF
  • EDC15 / EDC16 / ME7.X / MED9 IMMO OFF

SIMOS & DSG TEMIC COVERAGE

  • SIMOS8.x, SIMOS10.x, SIMOS11.1
  • SIMOS12.1 / 12.2
  • SIMOS18.x IMMO OFF
  • DSG TEMIC DL381 / DL382 IMMO OFF
  • DSG DQ200 / DQ250 GEN2 & MQB IMMO OFF
  • EEPROM & SIMOS FLASH checksum correction

Note: IMMO OFF solutions are intended for replacing defective ECUs/TCUs, engine swaps
and dedicated motorsport/off-road applications. You are responsible for complying with all local
regulations and road-use laws.

Overview of IMMO OFF Services

Immobilizer off (IMMO OFF) disables the immobilizer function inside the ECU or TCU so that the
engine or gearbox can operate without a coded key or matched module set. This is especially useful
when:

  • Replacing a defective ECU or TCU with a donor unit.
  • Performing engine or drivetrain swaps across different vehicles.
  • Building motorsport or off-road vehicles where the OEM immobilizer is not required.

Below you will find the main IMMO OFF options available for PCR2.1,
MED17 / EDC17, SIMOS and VAG DSG TEMIC, including
EEPROM-based and FLASH-based solutions with checksum handling.

Supported ECUs and TCUs (Representative List)

The IMMO OFF logic supports a wide range of ECUs and TCUs. The following families are supported, among others:

Bosch ME(D)C17 / MG1 / MD1

  • MED17.1, MED17.1.1, MED17.1.6, MED17.1.10, MED17.1.20, MED17.1.27
  • MED17.5, MED17.5.2, MED17.5.5, MED17.5.20
  • MED17.10, MED17.11, MED17.12
  • MED17.21, MED17.22, MED17.23, MED17.24
  • MED17.25, MED17.26, MED17.27, MED17.28
  • MG1CS001, MG1CS002, MG1CS008, MG1CS011
  • MG1CS015, MG1CS016, MG1CS018, MG1CS111
  • MD1CS001, MD1CS002, MD1CS012

Bosch EDC17

  • EDC17CP02, EDC17CP09, EDC17CP14, EDC17CP20
  • EDC17CP44, EDC17CP45
  • EDC17C06, EDC17C41, EDC17C42, EDC17C46
  • EDC17C49, EDC17C50, EDC17C54, EDC17C56
  • EDC17C60, EDC17C64, EDC17C66
  • EDC17C74, EDC17C76, EDC17C82, EDC17C84
  • EDC17C85, EDC17C86, EDC17C87

Delphi ECUs

  • Delphi DCM3.4, DCM3.7
  • Delphi DCM6.1, DCM6.2
  • Delphi MT05
  • Delphi CRD, Delphi CRD2

Siemens / Continental

  • Siemens PCR2.1 (dedicated PCR2.1 IMMO OFF logic)
  • Siemens SIMOS8, SIMOS10, SIMOS12, SIMOS18
  • Continental SIMOS8, SIMOS9, SIMOS10, SIMOS12

Valeo ECUs

  • Valeo V46.11
  • Valeo V50
  • Valeo V56

Other ECUs

  • Bosch M7.9.7
  • Bosch M7.9.8

This list is representative, not exhaustive. Coverage extends to many additional MEDC17, MG1, MD1,
Delphi and SIMOS file variants within the same families.

Service Types and Technical Details

ECU EEPROM IMMO OFF

This service disables the immobilizer and corrects checksum directly in the EEPROM for the
following ECUs:

  • MED17 / EDC17 WFS5
  • MED9
  • EDC16
  • ME7.X
  • EDC15

The patch is applied in the EEPROM area and checksum is handled by the solution, producing a
ready-to-write file for supported tools.

MED17 / EDC17 FLASH IMMO OFF

This option provides a total IMMO OFF in FLASH only for MED17 / EDC17 ECUs
used by VAG group. It does not require EEPROM modification and is designed to avoid DTCs or
immobilizer error messages on the cluster.

The algorithm automatically detects the ECU type and applies the correct patch. It has been
tested against thousands of MEDC17 files from multiple models and years.

Important: MED17 / EDC17 FLASH checksum correction is not performed by the
IMMO OFF logic itself. Your writing tool must handle FLASH checksum when programming the ECU.

PCR2.1 IMMO OFF (Flash-Based)

PCR2.1 IMMO OFF is a dedicated flash-based solution for VAG PCR2.1 ECUs.
The patch is applied directly in the FLASH, providing a total IMMO OFF state suitable for
ECU replacement and engine swaps.

Requirements and notes:

  • Requires a complete boot/bench read of the ECU (no virtual read).
  • The IMMO OFF routine is applied to the actual flash/processor content of that ECU.
  • Checksum handling is integrated for the patched area; your tool should still finalise checksums when writing.

This is one of the most requested solutions in the VAG world, especially for PCR2.1-based
1.6/2.0 TDI engines where standard ECU cloning is often complex or blocked by security.

SIMOS FLASH IMMO OFF

This is a full IMMO OFF solution in FLASH for SIMOS ECUs, including checksum correction.
The generated file is locked to the specific ECU.

Requirements and notes:

  • Requires a full read in BSL/BOOT mode (no virtual read).
  • IMMO OFF is applied in FLASH and the file checksum is calculated and corrected.
  • The output file is ready to write back to the ECU.

Supported SIMOS variants include, among others:

  • SIMOS8.2, 8.4, 8.5, 8.6
  • SIMOS10.11, 10.20, 10.22A
  • SIMOS11.1
  • SIMOS12.1, 12.2
  • SIMOS18.1, 18.2, 18.3, 18.6, 18.10
  • PCR2.1

VAG DSG TEMIC TCU EEPROM + FLASH IMMO OFF

For VAG DSG TEMIC gearboxes, the IMMO OFF solution covers, among others:

  • DL381
  • DL382
  • DQ200
  • DQ250 (GEN2 and MQB)

This is a total IMMO OFF for the TCU and requires full EEPROM and FLASH read.
The function also allows VIN editing where supported. Checksum is performed on EEPROM; FLASH
checksum must be managed by your writing tool.

MED17 / EDC17 IMMO OFF for Other Brands (Non-VAG)

A generic MEDC17 IMMO OFF patch is available for non-VAG Bosch ECUs through a dedicated menu
in the DTC disabler environment. It applies an immobilizer-off solution and automatically
disables related DTCs.

This generic patch has been tested across multiple brands (for example Jeep, Dodge, Mercedes,
Ford and others) on ECUs such as ME17.3.0 and similar MEDC17 variants.

Important usage note: IMMO OFF is primarily suitable for replacing defective ECUs,
handling engine swaps or building off-road / motorsport vehicles. On newer vehicles (MY2009+),
a full IMMO OFF can still allow the engine to start but may affect body functions (e.g. windows
up/down via BCM) and generate immobilizer messages on the cluster. Remember that the immobilizer
chain typically involves KEY → CLUSTER → BCM → ECU/TCU. Always verify behaviour on the vehicle.

Pricing and Quotes

For pricing and specific project evaluation (especially for PCR2.1 IMMO OFF and
complex VAG platforms), please submit a request via
tuningbot.com > Quote task. Provide ECU/TCU type, read method
(EEPROM/FLASH/BOOT) and vehicle details so we can guide you to the correct IMMO OFF option.

PCR2.1 & VAG IMMO OFF – Frequently Asked Questions

1. When should I use an IMMO OFF solution?

IMMO OFF is typically used when replacing a defective ECU or TCU, when performing engine or
drivetrain swaps or for motorsport and off-road projects where the original immobilizer
system is not required. It is not intended to bypass security on otherwise healthy vehicles.

2. What is special about PCR2.1 IMMO OFF?

PCR2.1 ECUs are widely used on VAG 1.6 and 2.0 TDI engines and are often difficult to clone or adapt
due to security and tuning protection. A dedicated PCR2.1 IMMO OFF flash solution
lets you reuse donor ECUs for engine swaps or replacements without needing a full immobilizer
adaptation procedure.

3. Do these IMMO OFF solutions cause DTCs or cluster immobilizer messages?

The MED17 and EDC17 FLASH IMMO OFF, PCR2.1 IMMO OFF and SIMOS FLASH IMMO OFF solutions are designed
to provide a total immobilizer-off state on supported ECUs without immobilizer DTCs or cluster
error messages. However, behaviour may vary by vehicle configuration and instrument cluster,
so real-vehicle testing is always recommended.

4. Do I need a full BSL/BOOT read or is virtual read enough?

For PCR2.1, SIMOS FLASH IMMO OFF and many MEDC17 solutions, a full boot or bench read is required.
Virtual read is not sufficient, because the patch must be applied to the exact file that belongs
to the ECU on the bench, including its specific software version and checksums.

5. Are checksums handled automatically?

EEPROM-based IMMO OFF solutions, PCR2.1 IMMO OFF and SIMOS FLASH IMMO OFF include checksum
handling for the areas they modify. For MED17 and EDC17 FLASH IMMO OFF and DSG FLASH memory, your
writing tool must still perform the final checksum calculation when programming the ECU or TCU.

6. Is IMMO OFF legal for road use?

Regulations vary by country. In many regions, altering the immobilizer system may not be
allowed on public-road vehicles. These IMMO OFF solutions are offered for ECU replacement,
engine swaps and motorsport or off-road applications. It is your responsibility to ensure
compliance with all local laws and regulations.