GrauTech Cleaner
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Which VW, Skoda, Audi, SEAT & Cupra models use the VW40 airbag ECU

The VW40 airbag ECU appears across many VW Group MQB and MEB models. Here is a practical model overview — and why you should always confirm by part number, not by model alone.

Where the VW40 airbag ECU is used

The VW40 airbag ECU (SRS control module) based on the Infineon Tricore TC233-32F processor is used widely across the Volkswagen Group. It appears on the MQB platform (combustion and hybrid) and on the MEB electric platform, in vehicles from VW, Škoda, Audi, SEAT and Cupra.

Model coverage is a useful starting point, but it is not a guarantee — the exact unit depends on model year, market and equipment level. Always confirm by part number.

MQB models (commonly 1EA / 5WA families)

VW40 units are commonly found on MQB-platform cars such as:

  • Volkswagen: Polo, Golf, T-Cross, T-Roc, Taigo, Virtus
  • Škoda: Fabia, Scala, Octavia, Kamiq, Karoq
  • SEAT: Ibiza, Arona, Leon
  • Cupra: Leon, Formentor
  • Audi: A1, A3

These are typically labelled in the 1EA 959 655 and 5WA 959 655 ranges.

MEB electric models (commonly 5WA / 1ED families)

On the MEB electric platform, VW40 units appear on cars such as:

  • Volkswagen: ID.3, ID.4, ID.5
  • Škoda: Enyaq
  • Audi: Q4 e-tron
  • Cupra: Born

These often carry 5WA 959 655 or 1ED 959 655 part numbers.

Don't guess by model — read the part number

Two cars of the same model and year can carry different airbag ECU part numbers depending on options such as airbag count, seat sensors and market. The reliable method is always to read the label on the unit and match the exact number.

Check yours against the VW40 part number guide and the processor details in TC233-32F compatibility.

Part number families at a glance

| Family | Typical platform | Example models | | --- | --- | --- | | 1EA 959 655 | MQB | Polo, Golf, Octavia, Fabia, A1, Leon | | 5WA 959 655 | MQB facelift / MEB | Golf, ID.3, ID.4, Enyaq | | 1ED 959 655 | Hybrid / EV | selected VW Group EV/hybrid |

Safety and scope

Airbag and SRS systems are safety systems. This overview is for identification only; any file service result must be verified by a qualified technician, and the service is intended only for professional, authorized workshop use. GrauTech Cleaner focuses on the VW40 family — see the supported part numbers and the terms of service.

Related information and next step

Disclaimer: Airbag and SRS systems are vehicle safety systems. The service is intended only for authorized workshop use, and every result must be verified by a qualified technician before use. GrauTech Cleaner is not affiliated with Volkswagen AG, Audi AG, Škoda Auto, SEAT or Cupra.

FAQ about VW40 airbag ECU reset

Does every Golf or Octavia use a VW40 airbag ECU?

Not necessarily. Coverage depends on model year, market and equipment. Always confirm the exact part number on the unit rather than relying on the model name.

Do electric ID models use VW40?

Many MEB electric models such as ID.3, ID.4, ID.5, Enyaq, Q4 e-tron and Born commonly use VW40 airbag ECUs, often with 5WA or 1ED part numbers.

How do I confirm my exact unit?

Read the part number from the label (1EA/5WA/1ED 959 655 xx) and match it against the VW40 part number guide and the supported part numbers list.

Not sure if your car's unit is a VW40? Match the part number against the supported list.

See supported VW40 part numbers

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