Airbag control unit with part number 89170-33420

What does the airbag control unit 89170-33420 do?

The airbag control unit 89170-33420 is the switching centre of the restraint system in Toyota vehicles. It processes the crash sensor data, selects in an emergency which airbags and seatbelt pretensioners to trigger, and monitors the system continuously. After an accident it stores crash data and locks itself.

The decision to trigger is taken within milliseconds. Detected faults are reported via the airbag warning light in the instrument cluster.

Why does the control unit 89170-33420 fail?

The most common cause is stored crash data that remain in the unit after an accident, even without a deployed airbag. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

A normal diagnostic tool does not remove the crash data. That is why this point comes first in the fault search.

The other causes develop over time. Electronics age, solder joints can have been made cold, and moisture acts on the plug contacts until they corrode.

Voltage spikes, for example from a weak battery or a jump start, additionally stress the circuit.

How can you tell that the 89170-33420 is defective?

The defect on the 89170-33420 shows up via the airbag warning light in the instrument cluster, which lights up permanently or only intermittently. Accompanying signs are a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

As long as the fault exists, airbags and seatbelt pretensioners may not deploy in an emergency. A prompt check shows what is behind it.

The light is a direct feedback from the system and not a sign to wait out.

Which vehicles is the 89170-33420 fitted in?

The 89170-33420 is fitted in these vehicles: Toyota Camry XV30 Facelift (2004-2006) and XV30 (2001-2004).

These models are known to us for this number:

• Toyota Camry XV30 Facelift (2004-2006)
• Toyota Camry XV30 (2001-2004)

Compare the part number on the label of the removed unit with this page. That shows that it is the right unit. Having the fault memory read out also shows whether the control unit itself is affected or a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-33430, 89170-33470, 89170-33530.

How does the repair of the 89170-33420 work?

First have the fault memory read out and attach the log. Then disconnect the battery, remove the control unit and create a repair order online before you send it in, packed carefully.

Keep to the sequence, as it protects your safety during removal. Pack the unit carefully afterwards.

Airbag24 checks the unit on the test bench and repairs defective components. Stored crash data are erased, followed by a function test. Processing at Airbag24 usually takes 3–4 working days, after which 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 89170-33420 get to Airbag24?

You send the control unit 89170-33420 as a parcel or have it collected by UPS for an extra charge. UPS handles the return after the repair.

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