Airbag control unit with part number 89170-52J30

What does the airbag control unit 89170-52J30 do?

The airbag control unit 89170-52J30 is the switching centre of the restraint system (SRS) in Toyota vehicles. It evaluates the signals from the crash sensors and, in an impact, determines within milliseconds which airbags and seatbelt pretensioners are triggered.

The unit checks the system while the vehicle is being driven and stores any faults it finds. The airbag warning light in the instrument cluster shows you such faults.

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

Why does the control unit 89170-52J30 fail?

The most common cause is crash data stored after an accident, even without a triggered airbag. Other causes in brief:

• ageing electronic components
• cold solder joints
• moisture and corrosion at plug connections
• voltage spikes, for example from a weak battery or a jump start

Crash data cannot be erased with an ordinary diagnostic tool. Airbag24 erases it during the repair.

How can you tell that the 89170-52J30 is defective?

Typical signs are an airbag warning light that stays on permanently or intermittently, an error message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

• Airbag warning light stays on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool cannot find the control unit
• Fault memory cannot be cleared

If you notice such signs, have the system checked promptly. In an emergency, airbags and seatbelt pretensioners may not be able to trigger.

Which vehicles is the 89170-52J30 fitted in?

The 89170-52J30 is fitted in these vehicles: Toyota Aqua NHP10 (2011-2015), NHP10 1st Facelift (2015-2017) and NHP10 2nd Facelift (2017-2021).

The following list shows the vehicles assigned to this part number.

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

Two steps will help you. Comparing the part number on the label of the removed unit with this page confirms that it is the right unit. Have the fault memory read out beforehand, because 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 89170-52J30 work?

Enclose the fault memory log, which you should have read out before you disconnect the battery and remove the control unit. Then create a repair order online and send the unit in well packed. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and carries out a function test. After that, your own unit goes back to you.

The procedure is fixed for safety reasons, so the battery is always disconnected before removal.

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 89170-52J30 get to Airbag24?

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

Put the printed repair order in the parcel and pack the control unit shock-proof.