Airbag control unit with part number 89170-42251

What does the airbag control unit 89170-42251 do?

The airbag control unit 89170-42251 is the central control unit of the restraint system (SRS) for Toyota. It assesses the data from the crash sensors and decides in an impact within milliseconds which airbags and seatbelt pretensioners are triggered. After an accident it records crash data and locks itself.

It also monitors the entire system during operation. It shows faults via the airbag warning light in the instrument cluster.

The function is less visible than the light itself, but it determines whether the restraint technology works properly at all.

Why does the control unit 89170-42251 fail?

The most common cause of a failure on the 89170-42251 is crash data recorded after an accident, even if no airbag was triggered. A standard diagnostic tool cannot erase this crash data.

During the repair at Airbag24, the crash data is erased.

The other causes are more technical in nature: electronic components age, solder joints go cold, and moisture or corrosion attacks plug connections. Voltage spikes come on top, for example from a weak battery or when a jump start is connected.

How can you tell that the 89170-42251 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 89170-42251 when it stays on permanently or intermittently. Add to this a fault message, a missing connection of the diagnostic tool, and a fault memory that cannot be cleared.

As long as the problem persists, airbags and seatbelt pretensioners may fail to trigger in an emergency.

Do not ignore the warning light, even if it only appears now and then.

Which vehicles is the 89170-42251 fitted in?

The part number 89170-42251 is intended for Toyota vehicles. It is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

The list gives an overview of the assignment:

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

Have the fault memory read out before removal. This shows whether the control unit is truly defective or whether a plug or cable is the cause. Then compare the part number on the label of the unit with 89170-42251.

For the same vehicles, we also repair control units with the part numbers 150300-8850, 89170-0R022, 89170-0R140, 89170-42201, 89170-42210, 89170-42420.

How does the repair of the 89170-42251 work?

First have the fault memory read out and attach the log to the order. Then disconnect the battery, remove the control unit 89170-42251 and create a repair order online. Only then pack the unit and send it in.

At Airbag24 the unit is checked, defective components are repaired, the stored crash data is erased and a function test follows. Your own unit is then returned to you. Processing at Airbag24 usually takes 3–4 working days.

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 89170-42251 get to Airbag24?

Your unit comes to Airbag24 as a parcel, or you arrange a UPS collection for an extra charge. After the repair, the return to you is made by UPS.

Put the printed repair order into the parcel and protect the control unit with shockproof material.