Airbag control unit with part number 89170-52J00

What does the airbag control unit 89170-52J00 do?

The control unit 89170-52J00 is part of the restraint system (SRS) of Toyota and controls the airbags and seatbelt pretensioners. The crash sensors supply it with data continuously, and in an accident it decides within milliseconds on triggering. Faults are indicated via the airbag warning light.

During operation, it monitors the entire system. If it detects a deviation, it creates an entry in the fault memory.

After an accident, it stores crash data and locks itself.

Why does the control unit 89170-52J00 fail?

The most common cause is crash data that remains stored in the unit after an accident, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Aged electronics, cold solder joints, moisture and corrosion on plugs, and voltage spikes are also involved.

Crash data is among the causes located in the control unit itself. The other causes concern the electronics and the connections in the vehicle and can occur individually or together.

How can you tell that the 89170-52J00 is defective?

The airbag warning light in the instrument cluster stays on permanently or comes on intermittently. In addition, a fault message appears, the diagnostic tool finds no connection, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

The warning light indicates the defect, so a prompt check is advisable.

Which vehicles is the 89170-52J00 fitted in?

The assignment applies only to this part number. The airbag control unit 89170-52J00 is fitted in these vehicles: Toyota Aqua NHP10 (2011-2015), NHP10 1st Facelift (2015-2017) and NHP10 2nd Facelift (2017-2021).

The vehicles are listed below.

• Toyota Aqua NHP10 (2011-2015)
• Toyota Aqua NHP10 1st Facelift (2015-2017)
• Toyota Aqua NHP10 2nd Facelift (2017-2021)

Compare the part number on the label of the removed unit with this page. This only confirms that it is the correct unit.

Have the fault memory read out before removal. Only the 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 152100-4560, 89170-42D50.

How does the repair of the 89170-52J00 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 the unit in, well packed.

Airbag24 inspects the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test.

Processing at Airbag24 normally 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 89170-52J00 get to Airbag24?

You arrange the shipment either as a parcel or with a UPS collection for an extra charge. Airbag24 sends your own unit back by UPS after the repair.

Pack the control unit shock-resistant and include the printed repair order.