Airbag control unit with part number A9069005801

What does the airbag control unit A9069005801 do?

The airbag control unit A9069005801 is the central control unit of the restraint system (SRS) for Mercedes-Benz. It evaluates the crash sensor signals, decides in a crash within milliseconds whether airbags and seatbelt pretensioners are triggered, and monitors the system continuously.

The unit indicates faults via the airbag warning light. After an accident it stores crash data and locks itself; only the repair lifts this lock.

The manufacturer number Bosch 0285011849 is also printed on the housing. It allows the unit to be matched unambiguously to the label during comparison.

Why does the control unit A9069005801 fail?

The most common cause is crash data stored after an accident, even if no airbag was triggered. Other causes are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Crash data remains in the unit even if the vehicle drives normally again after the accident. An ordinary diagnostic tool cannot erase it, so the system continues to report a fault. Airbag24 deletes the crash data during the repair.

The other causes tend to develop gradually. Ageing and penetrating moisture affect contacts and circuit boards over time, whereas voltage spikes can also cause a fault immediately.

How can you tell that the A9069005801 is defective?

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

Permanent lighting indicates a fault in the restraint system. Intermittent lighting also points to a fault, even if it does not occur on every journey.

In an emergency, the airbags and seatbelt pretensioners may not be triggered. The warning light makes the defect visible, so it is important to follow up on the warning.

Which vehicles is the A9069005801 fitted in?

The control unit A9069005801 is fitted in these vehicles: Mercedes-Benz Sprinter W906 (2006-2018).

The vehicles for which this part number is registered are listed here:

• Mercedes-Benz Sprinter W906 (2006-2018)

Compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit in front of you. Have the fault memory read out beforehand, because only that 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 000 446 06 42 (06), 0285010349, 0285011060, 285010054, 285010349, 285011400.

How does the repair of the A9069005801 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and 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 checks the unit on the test bench, replaces defective components, deletes the stored crash data and carries out a function test. Afterwards your own unit is returned to you.

The stated time relates only to testing, repairing and checking at Airbag24.

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 A9069005801 get to Airbag24?

You send the control unit A9069005801 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.