Airbag control unit with part number 89170-0DE50

What does the airbag control unit 89170-0DE50 do?

The airbag control unit 89170-0DE50 is the central evaluation unit of the SRS system from Toyota. It processes sensor data, decides in a crash whether airbags and seatbelt pretensioners are triggered, and monitors the entire system. Faults are shown via the airbag warning light.

After an accident, the control unit stores crash data and locks itself. Between accidents, monitoring continues unnoticed.

The electronics communicate with sensors, seatbelt pretensioners and airbags without the driver having to intervene.

Why does the control unit 89170-0DE50 fail?

Stored crash data from an accident is the most common cause with the 89170-0DE50, even if no airbag has deployed; a normal diagnostic tool cannot delete it. Other possible causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or jump-starting.

Airbag24 deletes the crash data during the repair.

The other causes act over time: components age, solder joints become brittle, and moisture finds its way into the connectors. Voltage spikes, by contrast, strike suddenly.

How can you tell that the 89170-0DE50 is defective?

A fault in the 89170-0DE50 shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Additionally, there may be a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light is not mere decoration; it is the signal that the system has detected a fault.

If the diagnostic tool does not communicate with the control unit at all, this is a sign that needs to be checked.

Which vehicles is the 89170-0DE50 fitted in?

The 89170-0DE50 is fitted in these vehicles: Toyota Yaris XP210 (from 2020).

This list shows the assigned vehicles.

• Toyota Yaris XP210 (from 2020)

To check whether the part number on the removed unit matches this page, compare it with the label. This comparison only confirms the identity of the unit. Having the fault memory read out before you remove the unit, however, clarifies whether the control unit is defective or whether connectors or cables are causing the fault.

For the same vehicles, we also repair control units with the part numbers 89170-0D730, 89170-0DE60, 89170-0DF50, 89170-52350, 89170-K0060.

How does the repair of the 89170-0DE50 work?

For the 89170-0DE50, first have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online before sending it off, well packed. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24, the unit is examined on the test bench. Defective components are replaced where necessary, stored crash data is deleted and a functional test is carried out. Your own unit is then returned 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 89170-0DE50 get to Airbag24?

The airbag control unit 89170-0DE50 comes to Airbag24 as a parcel, or by UPS collection, which is booked for an extra charge. After the repair, Airbag24 sends it back by UPS.

Pack the control unit shockproof and enclose the printed repair order.