Airbag control unit with part number 89170-04180

What does the airbag control unit 89170-04180 do?

The airbag control unit 89170-04180 is the control unit of the restraint system (SRS) for Toyota. It evaluates the crash sensors, determines within milliseconds in an accident the triggering of airbags and seatbelt pretensioners, and monitors the system permanently.

It reports faults via the airbag warning light. The monitoring runs without any action on your part.

After an accident, the control unit stores crash data and locks itself.

Why does the control unit 89170-04180 fail?

The most common cause with this 89170-04180 is a crash data store left behind after an accident, even if no airbag has deployed, and this cannot be erased with a normal diagnostic tool.

Aged electronic components can also cause the failure. Cold solder joints play a role too, as do moisture and corrosion on the plug connectors.

Voltage spikes, for example from a weak battery or a jump start, come in as a last group. Which of these causes applies is only shown by the examination.

How can you tell that the 89170-04180 is defective?

The airbag warning light in the instrument cluster lights up permanently or intermittently. A fault message can appear alongside it, the diagnostic tool gets no connection to the 89170-04180, or the fault memory cannot be cleared.

The warning light is the clearest sign the unit gives. In an emergency, the airbags and seatbelt pretensioners may then not be able to deploy.

Anyone who does not ignore the light and promptly arranges an examination keeps the situation under control.

Which vehicles is the 89170-04180 fitted in?

The airbag control unit 89170-04180 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015).

The list comes from the data on this part number:

• Toyota Tacoma N200 (2004-2015)

A comparison of the part number on the removed unit with this page only ensures that it is the right unit, nothing more. Whether the control unit itself is defective or a plug or cable is behind the fault is shown only by the fault memory read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-04420, 89170-04570, 89170-04600, 89170-04650.

How does the repair of the 89170-04180 work?

First you read out the fault memory and enclose the log. Then you disconnect the battery and only then remove the 89170-04180. Finally you create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 examines the unit on the test bench, replaces defective components, erases stored crash data and runs a function test. Afterwards the unit goes back to you.

The sequence at the start must be observed for safety reasons, before the control unit leaves the vehicle.

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 89170-04180 get to Airbag24?

The 89170-04180 is sent to Airbag24 as a parcel, or you book a UPS collection for an extra charge. UPS takes care of the return after the repair.

The printed repair order belongs in the parcel, and the unit must be packed shockproof.