Airbag control unit with part number 89170-0R050

What does the airbag control unit 89170-0R050 do?

The airbag control unit 89170-0R050 belongs to the restraint system (SRS) of Toyota. It evaluates the crash sensors, determines in an accident which airbags and seatbelt pretensioners trigger, and monitors the system during operation. Faults are indicated on the airbag warning light.

In a crash, the evaluation must be complete within milliseconds. For this reason the unit works constantly and compares sensor values with stored limit values.

After an accident, it stores crash data and locks itself. The lock is lifted only by the repair.

Why does the control unit 89170-0R050 fail?

Stored crash data is the most common cause, even if no airbag has deployed, and a normal diagnostic tool cannot erase it. Other causes are ageing components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

The crash data is held in memory, regardless of how the vehicle appears after the event.

The other causes concern ageing, moisture and the power supply. Ageing components and cold solder joints usually go unnoticed at first, whereas voltage spikes occur suddenly, for example with a weak battery or when connecting jump leads.

How can you tell that the 89170-0R050 is defective?

Typical signs are an airbag warning light that lights up permanently or intermittently, a fault message in the instrument cluster, a diagnostic tool without connection, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then not trigger.

• Airbag warning light on permanently or intermittently
• Fault message in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory cannot be cleared

If you notice such a display, a prompt check is the right step.

Which vehicles is the 89170-0R050 fitted in?

The 89170-0R050 is fitted in these vehicles: Toyota RAV4 XA30 (2006-2009) and XA30 Facelift (2009-2013).

The list shows the vehicles stored for this part number.

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

Compare the part number on the label of the removed unit with this page; then you know that it is the right unit. Have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

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 89170-0R050 work?

Processing at Airbag24 usually takes 3–4 working days, covering only checking, repairing and testing. Beforehand, have the fault memory read out and enclose the log, then disconnect the battery and remove the control unit 89170-0R050. Then create a repair order online and send in the well-packed unit.

The unit goes onto the test bench. There it is examined, defective components are replaced, crash data is removed and the function is tested. Afterwards, your own unit 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 89170-0R050 get to Airbag24?

You send the unit by parcel or book a UPS collection for an extra charge. The return after the repair is made by UPS.

The printed repair order goes into the parcel. Pack the unit shockproof.