Airbag control unit with part number 00052157721

What does the airbag control unit 00052157721 do?

The airbag control unit 00052157721 coordinates the restraint system in Fiat vehicles. It evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners fire in an emergency.

During operation it checks the system continuously. If it detects a fault, it stores the fault and shows it via the airbag warning light.

After an accident the unit stores crash data and locks itself.

Why does the control unit 00052157721 fail?

The most common cause for the 00052157721 is crash data from an accident, even if no airbag has deployed. Aged components, moisture at plug connections and voltage spikes are further possible triggers.

A normal diagnostic tool cannot erase this crash data.

Electronic components age, and solder joints can become brittle over time. Moisture attacks plug connections, so corrosion can develop.

Voltage spikes from the vehicle electrical system, for example with a weak battery or a jump start, also damage the electronics. Which cause applies is only established by the inspection.

How can you tell that the 00052157721 is defective?

A defect in the 00052157721 becomes visible through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Other signs are an error message, a diagnostic tool without a connection to the control unit, or a fault memory that cannot be cleared.

These signs mean that airbags and seatbelt pretensioners may not fire in an emergency. The warning light makes the fault visible, so it does not stay hidden.

A cleared entry is not the same as a rectified fault. Only reading out the fault memory shows which messages are actually stored.

Which vehicles is the 00052157721 fitted in?

The control unit 00052157721 is fitted in these vehicles: Fiat Tipo 356 (2016-2020). If your vehicle is among them, the unit is recorded for that model.

The list shows the vehicles to which we have assigned this control unit.

• Fiat Tipo 356 (2016-2020)

Compare the part number on the label of the removed unit with this page. This way you make sure it is the correct unit.

Have the fault memory read out beforehand. The 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 00052090728, 156348104, 208055, 52017547.

How does the repair of the 00052157721 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit 00052157721 and create a repair order online.

This order is for safety. Pack the unit well before you send it.

Airbag24 checks the unit on the test bench, replaces defective components and carries out a function test. Processing usually takes 3–4 working days, after which your own unit is returned to you. With this control unit, erasing the crash data is often not possible. If the crash data needs to be erased, please contact us briefly before sending the unit in – we will check your part number.

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 00052157721 get to Airbag24?

Send the control unit 00052157721 as a parcel, or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

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