Airbag control unit with part number 46537183

What does the airbag control unit 46537183 do?

The airbag control unit 46537183 is the central control unit of the restraint system (SRS) for Lancia. It evaluates the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation the unit monitors the entire system. If it detects a fault, it reports this via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. The measured values of the crash sensors are continuously collected in the control unit, so that evaluation remains possible at any time.

Why does the control unit 46537183 fail?

The most common cause is crash data stored after an accident, even when no airbag was triggered. Aging electronic components, cold solder joints, moisture at plug connections and voltage spikes also lead to failure.

A normal diagnostic tool cannot erase crash data. Airbag24 erases it during the repair.

Electronic components age over time, and solder joints can go cold or break. Moisture and corrosion at plug connections create transition resistances that disturb signal transmission.

Voltage spikes arise, for example, with a weak battery or a jump start and additionally stress the electronics.

How can you tell that the 46537183 is defective?

A defect shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. In addition there may be fault messages in the instrument cluster, a missing connection to the diagnostic tool, or a fault memory that cannot be cleared.

• Airbag warning light in the instrument cluster lights up permanently or intermittently
• Fault message in the instrument cluster
• The diagnostic tool gets no connection to the control unit
• The fault memory cannot be cleared

If any of these signs is present, have the system checked promptly. In an emergency, airbags and seatbelt pretensioners may fail to deploy.

Which vehicles is the 46537183 fitted in?

The airbag control unit 46537183 is installed in these vehicles: Lancia Y 840 Facelift (2000-2003) and 840 (1995-2000). The list below shows the vehicles individually.

The vehicles in detail:

• Lancia Y 840 Facelift (2000-2003)
• Lancia Y 840 (1995-2000)

Compare the part number on the label of the removed unit with this page. That only confirms that it is the correct unit. Also have the fault memory read out before removal, because only this result 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 46807477.

How does the repair of the 46537183 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the well-packed unit in.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a functional test. Processing usually takes 3–4 working days.

After that, your own unit 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 46537183 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Put the printed repair order in the parcel and pack the unit shockproof.