Airbag control unit with part number 89170-0E740

What does the airbag control unit 89170-0E740 do?

The airbag control unit 89170-0E740 of Toyota takes over control of the restraint system (SRS). It evaluates the crash sensors and determines within milliseconds which airbags and seatbelt pretensioners are triggered.

The unit also monitors the entire system continuously and reports faults via the airbag warning light in the instrument cluster.

After an accident, it stores crash data and locks itself.

Why does the control unit 89170-0E740 fail?

The most common cause with the 89170-0E740 is crash data stored after an accident, even without an airbag having been triggered. Further causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

• Crash data from an accident, even without airbag triggering
• aged electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a jump start

An ordinary diagnostic tool cannot erase the crash data. Airbag24 removes it during the repair.

The remaining causes concern the electronics and their connections. Without testing, it is not possible to say which of them applies.

How can you tell that the 89170-0E740 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently, and a fault message appears in the instrument cluster. In addition, the diagnostic tool cannot connect to the control unit, and the fault memory cannot be cleared.

Such signs mean that the airbag system has detected a fault.

In an emergency, airbags and seatbelt pretensioners may therefore not be able to trigger.

In which vehicles is the 89170-0E740 fitted?

This information comes from the data stored for this part number. The 89170-0E740 is fitted in these vehicles: Toyota Grand Highlander (from 2024).

The overview:

• Toyota Grand Highlander (from 2024)

Comparing the part number on the label with this page ensures that you have the correct unit. You must nevertheless have the fault memory read out beforehand, because only the result shows whether the control unit is defective or a cable or connector is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0E480, 89170-0E720, 89170-0E730, 89170-0E760.

How does the repair of the 89170-0E740 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit 89170-0E740, and create a repair order online. You send in the well-packed unit; at Airbag24, testing, repair and function test usually take 3–4 working days.

In the Airbag24 workshop the unit is checked, defective parts are replaced, crash data is deleted and a function test is carried out.

Afterwards, you receive your own unit 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 89170-0E740 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 by UPS.

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