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Simos ECU and DSG TCU Compatibility

Supported today: Simos 12.1/12.2, Simos 18.1, Simos 18.6, Simos 18.10 and DQ250 MQB.
Live in beta: DQ381 logging and flashing.
Supported brands: Volkswagen (VW), Audi, Skoda, SEAT and Cupra where applicable.

Compatibility depends on the control-unit ID, software version, box code and EPK. The vehicle model alone is not enough.

Simos 18 ECU compatibility

Simos 18.1, Simos 18.6 and Simos 18.10 are supported for logging and flashing with the simos.app dongle. Support depends on the ECU software version and available definition.
Simos 18 logging
Live
Mode 0x22 logging at up to 10 Hz and HSL at up to 50 Hz where available.
Unlock and flashing
Full workflow
ECU unlock, tuned flashing, CAL flashing and full BIN flashing are available for all supported Simos 18.x versions.

Simos 12.1 and Simos 12.2 compatibility

Simos 12.1 and Simos 12.2 support Mode 0x22 logging, DTC workflows and factory updates on supported software versions.
Logging and factory updates
Live
Mode 0x22 logging at up to 10 Hz, DTC workflows and supported factory software updates are available.
No custom flashing
Important
ECU unlock, tuned files, CAL flashing and full BIN flashing are not supported for Simos 12.1 or Simos 12.2.

DQ250 MQB logging and flashing

DQ250 MQB logging and flashing are live for all DQ250 MQB variants.
DQ250 MQB logging
0x22 + HSL
Mode 0x22 logging and HSL logging are supported for all DQ250 MQB variants.
DQ250 MQB flashing
Live
Flashing is supported for all DQ250 MQB variants.

DQ381 logging and flashing beta

DQ381 Mode 0x22 logging and flashing are live in beta for all DQ381 variants and TCU software versions. HSL logging is coming soon in beta.
DQ381 logging
0x22 Live
Mode 0x22 logging is supported for all DQ381 variants. HSL logging is coming soon in beta.
Flash only with recovery tools
Beta warning
Only flash a DQ381 if you have the tools and knowledge required to recover the TCU if the beta flashing process fails.

Compatibility FAQ

Quick answers about supported Simos ECUs and DSG transmission control units.
Is DQ250 MQB flashing supported?
Yes
Yes. Flashing, Mode 0x22 logging and HSL logging are live for all DQ250 MQB variants.
Is DQ381 flashing supported?
Live Beta
Yes. DQ381 flashing and Mode 0x22 logging are live in beta for all DQ381 variants and TCU software versions. HSL logging is coming soon in beta. Flash only with recovery tools.
Can Simos 12.1 or 12.2 be unlocked?
No
No. Simos 12.1 and Simos 12.2 support Mode 0x22 logging and factory updates, but not unlock or custom BIN flashing.
Can supported Simos 18 ECUs flash CAL and full BIN files?
Yes
Yes. Unlock, tuned flashing, CAL flashing and full BIN flashing are available for all supported Simos 18.x versions.

Known working car examples

Known working examples reported for supported ECU families. Always confirm by ECU ID, software version and box code.
MQB compact
Audi A3 8V
Seat Leon III
Audi TT 8S
VW Polo 6C
Seat Ibiza Cupra 6P
GTI, RS and Cupra
VW Golf VII GTI
VW Golf VII GTI Clubsport
VW Golf VII GTI TCR
Skoda Octavia III RS
Seat Leon Cupra 265
Seat Leon Cupra 290
Seat Leon Cupra 300
R, S and TTS
VW Golf VII R
VW T-Roc R
Audi S3 8V
Audi TTS
Audi TT 8S
Larger MQB
VW Arteon
Skoda Superb III

Engine codes

Engine code helps, but it is not the final compatibility check. ECU family, ECU ID, software version, box code and EPK still decide what works.
MQB 180-245 PS examples
Common
CESA, CHHB, CULC, CHHA, DKFA, DLBA, DKTB
Common applications: Audi A3 8V, Audi TT, VW Golf VII GTI, VW Tiguan, Skoda Octavia RS, Skoda Superb.
High-output MQB examples
Common
CJXE, CJXA, CJXB, CJXD, CYFB, CJXC, CJXH, DNUC, DNUE, CJXG, DJHA
Common applications: VW Golf VII R, Golf GTI Clubsport/TCR, Audi S3 8V, Audi TTS, Seat Leon Cupra, Cupra R.
Evo4 / Golf Mk8 R
Not today
Evo4 / Golf Mk8 R often means newer ECU generations such as Simos 19.x. Simos 19.x is not yet planned, so do not assume support from the engine code alone.

Known not-supported cases

If your car lands here, do not assume it will work without confirmation.
MED17
Not yet
MED17 is not supported yet. Support is planned/coming, but it should be treated as not supported today.
Other ECU families
Not yet planned
Simos 8, Simos 10, Simos 16, Simos 19.x, MED9, ME7, diesel ECUs and other non-listed ECU families are not yet planned.
Unsupported Simos IDs
Ask first
A car having a Simos ECU is not enough. The specific ECU ID, version and EPK must match supported definitions.
Problem states
Ask first
Cars with unknown tunes, recovery states, failed flashes or unusual immobilizer/security states should be checked before attempting any operation.

Not sure? Send this first

Email support@simos.app with your ECU/TCU ID, box code, software version, EPK if available, car model/year/engine, and a screenshot or log from the app.

Send a compatibility check