Airbag control unit with part number 89170-42320

What does the airbag control unit 89170-42320 do?

The airbag control unit 89170-42320 controls the restraint system (SRS) for Toyota. It analyses the signals from the crash sensors, determines in an accident within milliseconds which airbags and seatbelt pretensioners trigger, and monitors the system constantly. Faults are indicated via the airbag warning light.

During driving it checks the connections to sensors and triggers.

An accident causes the control unit to store crash data and lock itself.

Why does the control unit 89170-42320 fail?

Crash data from an accident in the memory of the 89170-42320 is the most common cause, even if none of the airbags fired. A standard diagnostic tool cannot erase it. Further causes include aged electronics, moisture and corrosion at plug connectors, and voltage spikes.

During the repair Airbag24 removes the stored crash data.

Aged components lose reliability over time, and cold solder joints can cause contact faults. Moisture creeps into plug connectors and promotes corrosion there. Voltage spikes, for example with a weak battery or after a jump start, additionally stress the electronics.

How can you tell that the 89170-42320 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 89170-42320 when it lights permanently or intermittently. Likewise, a fault message may appear in the instrument cluster, the diagnostic tool finds no connection to the control unit, or the fault memory cannot be erased.

The light reports the fault as soon as the system detects it, and it is therefore a central warning sign.

As long as the fault persists, the airbags and seatbelt pretensioners may not be able to fire in an emergency. A prompt check is therefore advisable.

Which vehicles is the 89170-42320 fitted in?

The airbag control unit 89170-42320 is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

The vehicles for which this part number is listed are shown here:

• Toyota RAV4 XA30 (2006-2009)
• Toyota RAV4 XA30 Facelift (2009-2013)

Matching the part number on the label of the removed unit with this page only confirms the assignment. It does not clarify the cause. Therefore have the fault memory read out beforehand, because its findings show whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 150300-8850, 89170-0P010, 89170-0P020, 89170-0P030, 89170-0P040, 89170-0P050.

How does the repair of the 89170-42320 work?

On the 89170-42320 you start by reading out the fault memory, and you attach the log to the unit. Then disconnect the battery and only afterwards remove the control unit. You create a repair order online and send the well-packed unit in. At Airbag24, checking, repairing and testing usually take 3–4 working days.

There, Airbag24 replaces defective components, removes the stored crash data and carries out a function test.

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. Afterwards your unit goes back to you.

How does the control unit 89170-42320 get to Airbag24?

You send the control unit 89170-42320 as a parcel or book a UPS collection for an extra charge. After the repair the unit goes back to you by UPS. You put the printed repair order into the parcel.

Pack the unit shockproof and so that nothing slips about in the box.