Airbag control unit with part number 89170-48430

What does the airbag control unit 89170-48430 do?

The airbag control unit 89170-48430 is the electronic centre of the restraint system (SRS) of Toyota. It recognises accidents from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners.

Milliseconds count for triggering, and that is exactly what the unit works on constantly in the background. In addition it checks the function of the system and displays faults via the airbag warning light.

Once it has registered an accident, it stores crash data and locks itself.

Why does the control unit 89170-48430 fail?

The most common cause is crash data left in the memory after an accident, even if no airbag fired. Other triggers are ageing components, cold contacts, wetness at plugs and voltage spikes.

The crash data remains in the unit until the repair. A normal diagnostic tool does not touch it.

Ageing components and cold contacts are classic weak points of electronics. Wetness and corrosion at plugs impair the contact, and voltage spikes from a weak battery or jump-starting strain the components. Which trigger applies is only shown by the fault memory reading.

How can you tell that the 89170-48430 is defective?

A defect becomes visible through the airbag warning light in the instrument cluster, a fault message, a missing connection to the diagnostic tool or a fault memory that cannot be cleared.

Typical signs at a glance:

• Airbag warning light stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool does not find the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then not trigger. Whether the control unit itself or its connection is affected is clarified by the examination.

Which vehicles is the 89170-48430 fitted in?

The 89170-48430 is fitted in these vehicles: Toyota Highlander XU40 (2007-2013).

Here follows the list:

• Toyota Highlander XU40 (2007-2013)

A look at the label of the removed control unit and a comparison with this page show whether the numbers match. That is all it says. Whether the unit is defective only the fault memory shows, which you have read out before removal.

For the same vehicles, we also repair control units with the part numbers 89170-48090, 89170-48240.

How does the repair of the 89170-48430 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and remove the control unit. Finally create the repair order online and send in the well-packed unit.

At Airbag24 the unit is checked on the test bench, defective components are repaired, crash data is erased and a function test is carried out. Airbag24 typically allows 3–4 working days for this work.

Afterwards your own unit is 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 89170-48430 get to Airbag24?

You send the unit as a parcel, or book a UPS collection for an extra charge. The return after the repair is also made by UPS.

Enclose the printed repair order in the parcel, and make sure the unit is packed shock-proof.