Airbag control unit with part number 13249347

What does the airbag control unit 13249347 do?

The airbag control unit 13249347 is the central control unit of the restraint system (SRS) in Opel. It processes the signals from the crash sensors, decides within milliseconds in the event of an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. It reports faults via the airbag warning light.

The crash sensors supply the control unit with measured values continuously while driving. If the evaluation detects an impact that requires deployment, the unit activates the appropriate airbags and seatbelt pretensioners.

After a crash, the unit stores crash data and locks itself. This process belongs to the safety logic of the system.

Why does the control unit 13249347 fail?

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

The crash data remains in the memory until Airbag24 erases it during the repair. Until then, a diagnostic tool changes nothing about it.

The other causes tend to develop gradually. Components change over the years, solder joints may have stayed cold since manufacture, and moisture or corrosion attack plug connections.

Voltage spikes arise, for example, from a weak battery or from starting with jump leads, and put additional strain on the electronics.

How can you tell that the 13249347 is defective?

A defect shows up through an airbag warning light that lights up permanently or intermittently, through an error message in the instrument cluster, and through a diagnostic tool without connection to the control unit. A fault memory that cannot be cleared is also a sign.

The warning light shows the fault immediately, so it does not have to go unnoticed until a later check. In an emergency, airbags and seatbelt pretensioners may possibly not deploy in the event of such a defect.

The signs show that the system has detected a fault. Only reading out the fault memory shows which component is affected.

Which vehicles is the 13249347 fitted in?

The assignment shows the vehicles in which this unit was fitted and remains a guide. The control unit 13249347 is fitted in these vehicles: Opel Zafira B (2005-2014); Opel Astra H (2004-2009).

The vehicles in detail:

• Opel Zafira B (2005-2014)
• Opel Astra H (2004-2009)

Before sending it in, two steps are recommended. Compare the part number on the label of the removed unit with this page; this ensures that it is the right unit. Also have the fault memory read out beforehand, because only the result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 13 181 977 DU, 13 188 857, 13 249 347 ST, 13 251 080 EC, 13 251 081, 13 251 084 EH.

How does the repair of the 13249347 work?

The fault memory is read out first and the log is enclosed. Then the battery is disconnected and only afterwards the control unit 13249347 is removed; next comes the repair order online and sending in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. After that, your own unit 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 13249347 get to Airbag24?

You send the unit 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 control unit shockproof.