Airbag control unit with part number 6N0909601H

What does the airbag control unit 6N0909601H do?

The airbag control unit 6N0909601H is the central control unit of the restraint system (SRS) for Volkswagen. It evaluates the signals from the crash sensors and, in an accident, decides within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident it stores crash data and locks itself.

The unit also carries the manufacturer number Continental 5WK4130 on its housing. It helps with matching the label against this page. The unit monitors the system continuously during operation and reports faults via the airbag warning light.

Why does the control unit 6N0909601H fail?

The most common cause in the 6N0909601H is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 erases the crash data during the repair, and you do not need to do anything beforehand. A weak battery or jump-starting can cause the voltage spikes that affect the unit.

Plug connections are worth a look when the unit is removed, but whether they are the trigger is only determined by the examination.

How can you tell that the 6N0909601H is defective?

The airbag warning light in the instrument cluster lights up on the 6N0909601H either permanently or intermittently, and an error message appears in the instrument cluster. The diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared.

Typical signs at a glance:

• The airbag warning light stays on permanently
• The light flickers only intermittently
• An error message is shown in the instrument cluster
• The diagnostic tool does not find the control unit
• The fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to trigger. Have the finding checked promptly.

Which vehicles is the 6N0909601H fitted in?

The control unit 6N0909601H is fitted in these vehicles: Volkswagen Polo 3 (6N) (1994-1999) and III 6N2 (1999-2001).

These vehicles are recorded for this part number:

• Volkswagen Polo 3 (6N) (1994-1999)
• Volkswagen Polo III 6N2 (1999-2001)

Comparing the part number on the label of the removed unit with this page only ensures that it is the correct unit. Have the fault memory read out beforehand, because only the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1C0 909 605 A, 1J0 909 603, 6N0 909 601, 6N0 909 603, 6N0909603E, 6Q0 909 601.

How does the repair of the 6N0909601H work?

First have the fault memory of the 6N0909601H read out and enclose the log. Then disconnect the battery, only then remove the control unit, create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 tests the unit on the test bench, erases the stored crash data, renews defective components and carries out a functional test. The unit then goes back to you.

Our repairs come with 2 years' statutory liability for defects.

The repaired control unit comes back with all vehicle data and is ready for use as soon as it is refitted — no coding or programming is required.

How does the control unit 6N0909601H get to Airbag24?

You send the control unit 6N0909601H as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.