Airbag control unit with part number 89170-04350

What does the airbag control unit 89170-04350 do?

The airbag control unit 89170-04350 is the control centre of the restraint system (SRS) of Toyota. It evaluates the signals from the crash sensors, determines in an accident which airbags and seatbelt pretensioners trigger, and monitors the system continuously.

If it detects a fault, the airbag warning light in the instrument cluster comes on. After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-04350 fail?

Stored crash data is the most common cause, even if no airbag has deployed. Airbag24 erases it during the repair; a standard diagnostic tool cannot do that. Other causes include aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

After an accident, the data is stored in the unit's memory even if no airbag has deployed. It stays there until it is erased during the repair.

The remaining causes are everyday damage to the electronics. A weak battery or a jump start can generate voltage spikes that affect the circuits.

How can you tell that the 89170-04350 is defective?

A defect in the 89170-04350 shows up as the airbag warning light, which stays on permanently or intermittently, as fault messages in the instrument cluster, and as a fault memory that cannot be cleared. In that case, airbags and seatbelt pretensioners may not trigger in an emergency.

• Airbag warning light in the instrument cluster stays on permanently or intermittently
• Fault message in the instrument cluster
• Diagnostic tool gets no connection to the control unit
• Fault memory cannot be cleared

Each of these signs justifies an inspection. The light indicates a detected fault, even if you do not yet know the cause.

Which vehicles is the 89170-04350 fitted in?

The 89170-04350 is fitted in these vehicles: Toyota Tacoma N200 (2004-2015). The part number on the removed unit clarifies whether your car is among them.

The details in brief:

• Toyota Tacoma N200 (2004-2015)

First compare the part number on the label of the removed unit with this page. This only confirms that you have the correct unit in front of you. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

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 89170-04350 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove the control unit. Next, create a repair order online and send in the well-packed 89170-04350. At Airbag24, processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, erases stored crash data and carries out a function test. Your own unit is then returned to you. The order of these steps serves your safety.

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 89170-04350 get to Airbag24?

You send the 89170-04350 as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.