Airbag control unit with part number HY53-14C246-AC

What does the airbag control unit HY53-14C246-AC do?

The airbag control unit HY53-14C246-AC belongs to the restraint system (SRS) of Aston Martin and controls it. It processes the crash sensors, decides in a crash within milliseconds which airbags and seatbelt pretensioners are triggered, and monitors the system continuously. After an accident it stores crash data and locks itself.

The unit detects faults itself and shows them via the airbag warning light in the instrument cluster. The warning therefore appears directly in the vehicle.

Why does the control unit HY53-14C246-AC fail?

Stored crash data is the first thing to consider on the HY53-14C246-AC: it remains in the unit after an accident even if no airbag has deployed, and it is the most common cause. A normal diagnostic tool cannot erase it. Other causes are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes, for example from weak batteries or jump-starting.

A diagnostic tool does not help with crash data, because it does not remove the entries. The route to a fix therefore runs through the repair.

Ageing and moisture act on the electronics over a longer period.

How can you tell that the HY53-14C246-AC is defective?

On the HY53-14C246-AC you recognise a defect mainly by the airbag warning light and by fault messages in the instrument cluster. In an emergency, the airbags and seatbelt pretensioners may then not be able to deploy.

• Airbag warning light, permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

If you notice one of these signs, have the system checked promptly. The warning light names the fault as such; the exact cause is then clarified by the fault memory.

Which vehicles is the HY53-14C246-AC fitted in?

The control unit HY53-14C246-AC is fitted in these vehicles: Aston Martin DB11 VH2 (2016-2023).

Here you can see which vehicles are known to us for this part number:

• Aston Martin DB11 VH2 (2016-2023)

Comparing the part number on the label with this page only confirms that it is the right unit. It does not clarify the cause. Therefore have the fault memory read out beforehand, because only this log shows whether the control unit is faulty or a plug or cable is responsible.

For the same vehicles, we also repair control units with the part numbers 97128002, 97128004, HY53-14C246-AD.

How does the repair of the HY53-14C246-AC work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery and only then remove the HY53-14C246-AC. Next create a repair order online and send in the well-packed control unit. At Airbag24, checking, repairing and testing usually take 3–4 working days.

Airbag24 then checks the unit on the test bench, replaces faulty components, deletes the stored crash data and carries out a function test. Your own 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 HY53-14C246-AC get to Airbag24?

You send the control unit HY53-14C246-AC to Airbag24 as a parcel, or book a UPS collection for an extra charge. After the repair, the unit comes back to you by UPS. Put the printed repair order in the parcel and pack the control unit shock-proof.

Firm packaging protects the electronics from knocks in transit.