Volkswagen Central Electronics Control Module (CECM)

The Central Electronics Control Module (CECM) is situated above the pedals on the drivers side and controls all the lights in the car, monitors them, controls what appears in the MFD under the lights menu, controls the leaving home and coming home lights function,  controls the horn(s) and other features. There are different variants of this module called the Medium and the Highline, the latter is required for fog lights, bi-xenons and other features.

Partial listing of CECM’s and their details

3C0 937 049 (3C0937049) – 21 Byte – Medium
3C0 937 049 A (3C0937049A) – 21 Byte – Medium
3C0 937 049 B (3C0937049B) – 21 Byte – Medium
3C0 937 049 C (3C0937049C) – 21 Byte – Highend
3C0 937 049 D (3C0937049D) – 21 Byte – Medium
3C0 937 049 E (3C0937049E) – 21 Byte – Highend
3C0 937 049 F (3C0937049F) – 21 Byte – Medium
3C0 937 049 G (3C0937049G) – 21 Byte – Highend
3C0 937 049 H (3C0937049H) – 23 Byte – Medium
3C0 937 049 J (3C0937049J) – 23 Byte – Highend
3C0 937 049 K (3C0937049K) – 23 Byte – Medium
3C0 937 049 L (3C0937049L) – 23 Byte – Highend
3C0 937 049 P (3C0937049P) – 23 Byte – Medium
3C0 937 049 Q (3C0937049Q) – 23 Byte – Highend
3C0 937 049 R (3C0937049R) – 23 Byte – Medium
3C0 937 049 S (3C0937049S) – 23 Byte – Highend
3C0 937 049 T (3C0937049T) – 23 Byte – Medium
3C0 937 049 AA (3C0937049AA) – 23 Byte – Highend
3C0 937 049 AB (3C0937049AB) – 23 Byte – Medium
3C0 937 049 AC (3C0937049AC) – 23 Byte – Highend
3C0 937 049 AD (3C0937049AD) – 23 Byte – Medium
3C0 937 049 AE (3C0937049AE) – 23 Byte – Highend
3C0 937 049 AF (3C0937049AF) – 23 Byte – Medium
3C0 937 049 AG (3C0937049AG) – 23 Byte – Highend
3C0 937 049 AH (3C0937049AH) – 30 Byte – Medium
3C0 937 049 AJ (3C0937049AJ) – 30 Byte – Highend
3C0 937 049 AK (3C0937049AK) – 30 Byte – Medium
3C0 937 049 AL (3C0937049AL) – 30 Byte – Highend
3C8 937 049 A (3C8937049A) – 30 Byte – Medium
3C8 937 049 D (3C8937049D) – 30 Byte – Medium
3C8 937 049 E (3C8937049E) – 30 Byte – Highend
3C8 937 049 F (3C8937049F) – 30 Byte – Highend
3C8 937 049 G (3C8937049G) – 30 Byte – Medium
3C8 937 049 H (3C8937049H) – 30 Byte – unsure
3C8 937 049 N (3C8937049N) – 30 Byte – unsure
3C8 937 049 P (3C8937049P) – 30 Byte – unsure
3C8 937 049 Q (3C8937049Q) – 30 Byte – unsure
3C8 937 049 R (3C8937049R) – 30 Byte – Highend
3C8 937 049 S (3C8937049S) – 30 Byte – Highend
3C8 937 049 AA (3C8937049AA) – 30 Byte – unsure
3C8 937 049 AB (3C8937049AB) – 30 Byte – Highend

20 thoughts on “Volkswagen Central Electronics Control Module (CECM)”

  1. can you advise about this ?
    Address 19: CAN Gateway Labels: 1K0-907-530.lbl

    Part No SW: 1K0 907 530 F HW: 1K0 907 951

    Component: Gateway H10 0120

    Revision: H10 Serial number: 2800105C1097E4

    Coding: 3D3F0B08070002

    Shop #: WSC 00046 412 11468

    VCID: 2A5000F6BAA53F4C

    1 Fault Found

    01044 – Control Module Incorrectly Coded

    000 – –

    Freeze Frame:

    Fault Status: 01100000

    Fault Priority: 1

    Fault Frequency: 71

    Reset counter: 177

  2. I have been told that US versions of the golf have full cicle brake lights is that true?
    as over here in the UK we only get half cicle ie as you look at the brake lights ( and the US
    () any help with this would be great ie what type of cecm you guys have

  3. Pingback: Anonymous
  4. Have a question… I have to fix my CECM (3c0 937 049 e) and a friend told me to replace it with a 3c8 937 049 e… pls your comments

  5. I have a 3C2 passat, 2007, BMP. The power plant has the code 3C0 937 049 AE. With what code can I change without having problems?

  6. I have a 3C2 passat, 2007, BMP. The CECM has the code 3C0 937 049 AE. With what code can I change without having problems?

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