Compatibility

Supported ECUs today: Simos 12.1, Simos 18.1, Simos 18.6 and Simos 18.10.
Coming support: DQ250 and DQ381 logging and flashing.
Supported brands: VW, Audi, Skoda, Seat, Cupra and Porsche where applicable.

If your ECU or TCU ID is not clearly covered here, ask before buying hardware or trying to flash.

Supported functions by ECU

Use this as the quick decision point. Flashing support is ECU-family specific.

Simos 12.1

Logging + DTC + stock updates

Supported: logging, DTC workflows and stock updates.
Not supported: unlock, tuned flashing, CAL flash and full flash.

Simos 18.1

Full workflow

Supported: logging, DTC, ECU unlock, flashing, CAL flash and full flash.

Simos 18.6

Full workflow

Supported: logging, DTC, ECU unlock, flashing, CAL flash and full flash.

Simos 18.10

Full workflow

Supported: logging, DTC, ECU unlock, flashing, CAL flash and full flash.

DQ250

Coming

Coming support: logging and flashing for supported DQ250 versions. Ask first before assuming your TCU is covered.

DQ381

Coming

Coming support: logging and flashing for supported DQ381 versions. Ask first before assuming your TCU is covered.

Known working car examples

Known working examples reported for supported ECU families. Always confirm by ECU ID, software version and box code.

MLB longitudinal

Audi A5 8T
Audi A4 B8 (8K5)
Audi A4 B9

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

Porsche 2.0 EA888 Gen 3

Known working examples include Porsche 2.0 EA888 Gen 3 applications where the ECU ID matches a supported Simos family. Verify by ECU ID, software version and box code before flashing.

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.

Audi longitudinal / Porsche / Scirocco examples

Ask with ID

CAEA, CAEB, CDNB, CDNC, CULA, CNCD
Common applications: Audi A4 B8, Audi A5 8T, Audi Q5, SEAT Exeo, VW Scirocco, Porsche Macan 2.0 EA888 Gen 3.

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 Scirocco, 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.

Regional / China-market examples

Ask first

CUHA, DMJA, DKWB, DKWA, DBFA, DKVA, DPLA, CWNA, DKUA, DTAA
Applications can include VW Phideon, VW Magotan, Audi A4L, Audi A6L, Audi Q5L and market-specific variants.

Additional codes to check

Ask first

CJEB, CJSA, DAJA, DAJB, CZPB, CVKB
Send the ECU ID, software version and EPK so support can confirm whether the definition is covered.

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