Airbag control unit with part number 89170-04030

What does the airbag control unit 89170-04030 do?

The airbag control unit 89170-04030 brings together all triggering decisions in the restraint system (SRS) of Toyota. It reads the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds, and keeps the system under observation. It makes faults visible via the airbag warning light. After an accident it stores crash data and locks itself.

It works in the background without you noticing.

Why does the control unit 89170-04030 fail?

The most common cause is stored crash data after an accident, even if no airbag has deployed; a standard diagnostic tool cannot clear it. Other possible causes are aged electronics, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

So after an accident in which no airbags deployed, still think of the crash data.

The remaining causes are wear and environmental influences: electronics age, solder joints become brittle, and moisture attacks contacts. A weak battery or jump-starting can also generate voltage spikes.

How can you tell that the 89170-04030 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently, and the control unit reports a fault. Further signs include:

• Fault message in the instrument cluster
• Diagnostic tool without connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

Which vehicles is the 89170-04030 fitted in?

The assignment depends on the part number. The 89170-04030 is fitted in these vehicles: Toyota Tacoma N150 (1995-2004).

These vehicles belong to the number:

• Toyota Tacoma N150 (1995-2004)

If the number on the label of the removed unit matches this page, it is the right unit. However, only the fault memory, which you should have read out beforehand, shows whether the control unit itself is defective.

For the same vehicles, we also repair control units with the part numbers 89170-04080, 89170-04120.

How does the repair of the 89170-04030 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only afterwards remove the control unit. Next, create a repair order online and send the unit well packed.

Airbag24 checks the unit on the test bench, replaces defective components, deletes stored crash data and finally carries out a function test. For these tasks at Airbag24, 3–4 working days are usually planned.

The unit then 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 89170-04030 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

The parcel contains the printed repair order, and the unit is packed shockproof.