Airbag control unit with part number 97128004

What does the airbag control unit 97128004 do?

The airbag control unit 97128004 is the central control unit of the restraint system (SRS) in Aston Martin. It reads the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident, it stores crash data and locks itself.

In normal operation the unit remains unobtrusive. It checks the power supply, sensors and firing circuits.

Every detected fault ends up in memory and is reported via the airbag warning light.

Why does the control unit 97128004 fail?

The most common cause is crash data stored after an accident, even if no airbag has deployed, and a normal diagnostic tool cannot remove it. In addition, ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes come into question, for example from a weak battery or a jump start.

The entry with the crash data remains even if the car then runs without any irregularities. Airbag24 erases the data during the repair.

Ageing components and cold solder joints lead to intermittent faults. Moisture and corrosion at the plug connections weaken the contact over time.

Voltage spikes also stress the electronics, for example when the battery is weak or a jump start is needed.

How can you tell that the 97128004 is defective?

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

The signs at a glance:

• Airbag warning light, permanently or intermittently
• Fault message in the instrument cluster
• No connection to the diagnostic tool
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may fail to deploy. A check is therefore sensible as soon as one of these signs appears.

Which vehicles is the 97128004 fitted in?

The airbag control unit 97128004 is fitted in these vehicles: Aston Martin DB11 VH2 (2016-2023).

The list shows the vehicles that Airbag24 has assigned to this part number.

• Aston Martin DB11 VH2 (2016-2023)

Compare the part number on the label of the removed unit with this page. This only clarifies whether it is the correct unit.

Have the fault memory read out before removing anything. 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 97128002, HY53-14C246-AC, HY53-14C246-AD.

How does the repair of the 97128004 work?

First have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit 97128004. Then 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, erases the crash data and carries out a function test. The unit then goes back to you.

The removal may only take place once the battery has been disconnected.

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 97128004 get to Airbag24?

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

The printed repair order goes into the parcel. Pack the unit shockproof before sending it off.