Airbag control unit with part number 89170-52E10

What does the airbag control unit 89170-52E10 do?

The airbag control unit 89170-52E10 is the central control unit of the restraint system (SRS) in Toyota vehicles. It evaluates the crash sensors and determines in an accident within milliseconds which airbags and seatbelt pretensioners are triggered.

During operation it checks continuously whether all components are working. A fault is reported via the airbag warning light in the instrument cluster.

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

Why does the control unit 89170-52E10 fail?

For the 89170-52E10, the most common cause lies in crash data stored after an accident, even if no airbag was triggered. Added to this are aged components, cold solder joints, moisture and corrosion at plug connectors, and voltage spikes.

Crash data cannot be erased with a normal diagnostic tool. Airbag24 removes it during the repair.

Aged electronics, cold solder joints and corrosion are among the causes that build up over years. Voltage spikes, on the other hand, arise suddenly, for example with a weak battery or when a jump start is connected.

How can you tell that the 89170-52E10 is defective?

The airbag warning light in the instrument cluster lights up constantly or intermittently. An error message in the instrument cluster accompanies it, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

With such a defect, airbags and seatbelt pretensioners may possibly not deploy in an emergency. The warning light shows the finding, which is why it should be checked promptly.

Which vehicles is the 89170-52E10 fitted in?

The control unit 89170-52E10 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

The following compilation lists the vehicles for which this unit is registered.

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

Comparing the part number on the label of the removed unit with this page confirms the correct unit. Reading out the fault memory shows whether the control unit or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D170, 89170-0D230, 89170-0D440.

How does the repair of the 89170-52E10 work?

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

Airbag24 checks the unit on the test bench, renews defective components, deletes the crash data and carries out a function test. Afterwards 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 89170-52E10 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it via UPS.

The printed repair order goes into the parcel. The unit is packed shock-proof.