Airbag control unit with part number 89170-02K50

What does the airbag control unit 89170-02K50 do?

The airbag control unit 89170-02K50 controls the restraint system in vehicles from Toyota. In an impact it reads the crash sensors and decides within milliseconds which airbags and seatbelt pretensioners trigger. During normal operation it monitors the whole system and reports every fault via the airbag warning light.

To do so it continuously checks lines, sensors and the supply voltage. This way it becomes apparent when a component falls out of step.

After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-02K50 fail?

Most often the cause is crash data stored after an accident, even if no airbag triggered. An ordinary diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes from a weak battery or jump-starting are also possible causes. Airbag24 erases the crash data during repair.

An accident without airbag deployment also leaves this entry. It stays in the unit until the repair removes it.

The other causes act over time. Solder joints become brittle, moisture attacks plug connections, and electronic components age.

How can you tell that the 89170-02K50 is defective?

The airbag warning light in the instrument cluster is the first sign. It lights up permanently or intermittently, and a fault message in the instrument cluster may come with it. A diagnostic tool that cannot get a connection to the control unit, or a fault memory that cannot be cleared, confirms the suspicion. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

Take the light seriously, even if the car otherwise drives normally.

Only reading out the fault memory shows which cause lies behind it.

Which vehicles is the 89170-02K50 fitted in?

The airbag control unit 89170-02K50 is fitted in these vehicles: Toyota Corolla E170 (2013-2018).

Here follows the list of vehicles for which this number is recorded:

• Toyota Corolla E170 (2013-2018)

Comparing the number on the label of the removed unit with this page only confirms that you have the right unit in front of you. Also have the fault memory read out beforehand. Only that 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 89170-02C60, 89170-02C70, 89170-02C80, 89170-02C90, 89170-12280, 89170-12340.

How does the repair of the 89170-02K50 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 the unit off well packed. Processing at Airbag24 usually takes 3–4 working days.

At Airbag24 the unit is checked on the test bench, defective components are replaced, the stored crash data is erased, and a function test follows. The unit then goes 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 89170-02K50 get to Airbag24?

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

Enclose the printed repair order and pack the unit shockproof.