Airbag control unit with part number 1473446-00-B

What does the airbag control unit 1473446-00-B do?

The airbag control unit 1473446-00-B controls the restraint system (SRS) of Tesla. It processes the sensor signals, selects the appropriate airbags and seatbelt pretensioners in a crash, and monitors the entire system. It indicates faults via the airbag warning light.

During normal operation the unit continuously checks the components that belong to the system. If it detects a deviation, it creates an entry in the fault memory that a diagnostic tool can read out later.

After an accident it stores crash data and locks itself. In this way the unit acts as the memory of the restraint system for that event.

Why does the control unit 1473446-00-B fail?

Most often the cause lies in crash data stored after an accident, even if no airbag has deployed. Other possible causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

A normal diagnostic tool cannot remove this crash data. At Airbag24 it is erased during the repair, so that the check can then concentrate on the actual defect.

The other influences wear down electronics and contacts over the years and can remain unnoticed at first, until a fault occurs.

How can you tell that the 1473446-00-B is defective?

The airbag warning light in the instrument cluster stays on permanently or flickers now and then, and a fault message also appears in the instrument cluster. The diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

Such a state can mean that airbags and seatbelt pretensioners do not deploy in an emergency. The unit thus reports a condition that should not be overlooked in everyday use.

Anyone who notices the warning should act promptly and have the system checked before driving on.

Which vehicles is the 1473446-00-B fitted in?

The control unit 1473446-00-B is found in these vehicles: Tesla Model S Mk1 (2013-2021); Tesla Model 3 Mk1 (2019-2023). Whether the removed unit matches can be checked against the part number on the label.

Here follows the overview of the vehicles in which this part number is used:

• Tesla Model S Mk1 (2013-2021)
• Tesla Model 3 Mk1 (2019-2023)

Compare the part number on the label of the removed unit with this page, and you will know that it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 0 285 014 174, 1005273-00-F, 103222400B, 1095757-00-B, 1095757-00-C, 1512876-00-B.

How does the repair of the 1473446-00-B work?

First have the fault memory read out and attach the log, then disconnect the battery and only then remove the control unit. Next you create a repair order online and send the unit in well packed. Processing at Airbag24 normally takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs it, erases the stored crash data and carries out a function test. Disconnecting the battery before removal is part of safety, which is why the sequence is binding.

After the function test your own unit goes back. 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 1473446-00-B get to Airbag24?

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

Pack the control unit so that it withstands impacts, and enclose the printed repair order.