Airbag control unit with part number 89170-52610

What does the airbag control unit 89170-52610 do?

The airbag control unit 89170-52610 is the central control unit of the restraint system for Toyota. It processes the measured values from the impact sensors, decides in a crash within fractions of a second on airbags and seatbelt pretensioners, and monitors the system constantly.

Faults in the system are shown via the airbag warning light in the instrument cluster, so the defect becomes visible.

After an accident the control unit stores crash data and locks itself. That is part of how the system works.

Why does the control unit 89170-52610 fail?

The most common cause is crash data that remains in the unit after an accident, even if no airbag has deployed at all; a normal diagnostic tool cannot erase it. In addition there are ageing electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from the vehicle electrical system, for example with a weak battery.

Stored crash data cannot be seen from outside. That is why the readout of the fault memory provides the first clue.

The other causes act in different ways: ageing and corrosion work gradually, whereas voltage spikes strike suddenly. Both can only be narrowed down by a check.

How can you tell that the 89170-52610 is defective?

The airbag warning light in the instrument cluster stays on continuously or intermittently, and an error message additionally appears in the instrument cluster. The diagnostic tool finds no connection to the control unit, or the fault memory cannot be cleared. Then the airbags and seatbelt pretensioners may not deploy in an emergency.

Respond promptly to these signs, because the warning light makes the finding visible without you having to measure anything.

Even if a diagnostic tool establishes no connection at all, a second look is worthwhile: the cause may lie in the control unit or in the wiring to it.

Which vehicles is the 89170-52610 fitted in?

The 89170-52610 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The list shows the vehicles to which Airbag24 has assigned this part number.

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

A comparison of the part number on the label of the removed unit with this page only confirms that you have the right unit. Before you remove it, have the fault memory read out, 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 212986-105, 212986-110, 220749-101, 89170-0D160, 89170-0D170, 89170-0D180.

How does the repair of the 89170-52610 work?

First have the fault memory read out and attach the log to the unit, then disconnect the battery and only then remove the control unit. Afterwards create a repair order online and send in the well-packed unit. At Airbag24, testing, repair and function test usually take 3–4 working days.

The order protects you during removal and ensures that the log is complete.

Airbag24 checks the control unit on the test bench and repairs or replaces the defective components. It then deletes stored crash data, carries out a function test and sends your unit back.

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 89170-52610 get to Airbag24?

You send the control unit as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair the return shipment follows by UPS, and your printed repair order goes with the parcel.

Pack the control unit shockproof, securely in a sturdy box with filling material.