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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

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