Airbag control unit with part number 89170-26550

What does the airbag control unit 89170-26550 do?

As the central control unit, the airbag control unit 89170-26550 monitors the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides within milliseconds in an accident whether airbags and seatbelt pretensioners fire, and signals faults via the airbag warning light. After an accident, it stores crash data and locks itself.

In normal operation the control unit remains unobtrusive. Only a detected fault brings it to the foreground.

Why does the control unit 89170-26550 fail?

The most common cause: crash data stored after an accident brings the 89170-26550 to failure, even without a deployed airbag. A usual diagnostic tool cannot remove this data. Ageing, cold solder joints, moisture and corrosion at plug connections, as well as voltage spikes, also occur.

Precisely because the crash data is stored invisibly, one does not immediately think of it in the event of a failure.

The other causes result from age and environmental influences, such as moisture in the plugs. Voltage spikes arise, for example, with a weak battery or a jump start and can damage the electronics.

How can you tell that the 89170-26550 is defective?

A defect in the 89170-26550 shows itself when the airbag warning light in the instrument cluster lights up, whether permanently or only intermittently, a fault message appears, the diagnostic tool cannot gain access to the control unit, or a fault memory cannot be cleared. In an emergency, the airbags and seatbelt pretensioners may then fail to deploy.

The airbag warning light in the instrument cluster is the clearest indication. It can stay on permanently or only flicker now and then, and in both cases there is a fault.

The fault message and the fault memory are supplementary indications that a diagnostic tool can break down further.

Which vehicles is the 89170-26550 fitted in?

The airbag control unit 89170-26550 is used by Toyota in several models. It is fitted in these vehicles: Toyota HiAce H300 (from 2019).

Here is the overview of the vehicles we have for this part number.

• Toyota HiAce H300 (from 2019)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit. Also have the fault memory read out in advance, because only that shows whether the control unit is defective or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 152100-4560, 89170-42D50.

How does the repair of the 89170-26550 work?

At the start, the fault memory of the 89170-26550 is read out and you attach the log. Then you disconnect the battery and only now remove the control unit. Next, create a repair order online and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases the stored crash data and carries out a functional test.

Afterwards, 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 89170-26550 get to Airbag24?

You can send the 89170-26550 in as a parcel or book a UPS collection for an extra charge. The return of the repaired unit is made by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.