Airbag control unit with part number 89170-52N10

What does the airbag control unit 89170-52N10 do?

The airbag control unit 89170-52N10 is the central control unit of the SRS for Toyota. It processes the signals from the crash sensors, determines the triggering of airbags and seatbelt pretensioners within milliseconds in the event of an accident, and monitors the entire system. Faults appear via the airbag warning light.

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

Monitoring takes place continuously while driving.

Why does the control unit 89170-52N10 fail?

The most common cause is crash data that was stored after an accident, even if no airbag has deployed; a standard diagnostic tool does not erase it. The control unit 89170-52N10 can also be disrupted by ageing electronics, cold solder joints, moisture on connectors and voltage spikes.

The crash data remains stored until someone deliberately deletes it. A standard diagnostic tool cannot access this data.

Aged components and cold solder joints can impair function. Moisture and corrosion at the connectors disrupt the contact between the unit and the vehicle wiring.

Voltage spikes, for example from a weak battery or when connecting a jump start, place additional strain on the electronics.

How can you tell that the 89170-52N10 is defective?

A defect in the control unit 89170-52N10 shows mainly through the airbag warning light, when it lights up permanently or intermittently. A fault message in the instrument cluster, no connection between the diagnostic tool and the control unit, or a fault memory that cannot be cleared are also signs. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The light in the instrument cluster is the driver's direct indication that the restraint system is reporting a fault.

Once a diagnostic tool is connected, the fault memory can be read and an initial finding obtained.

Which vehicles is the 89170-52N10 fitted in?

The control unit 89170-52N10 is fitted in these vehicles: Toyota Aqua NHP10 1st Facelift (2015-2017), NHP10 2nd Facelift (2017-2021) and NHP10 (2011-2015).

This compilation shows the vehicles in detail:

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

Comparing the part number on the label of the removed unit with this page ensures that you have the correct unit. Having the fault memory read, on the other hand, shows whether the control unit is defective or whether a connector or cable is the cause, and is therefore done first.

For the same vehicles, we also repair control units with the part numbers 89170-52J00, 89170-52J10, 89170-52J20, 89170-52J30, 89170-52J40, 89170-52J80.

How does the repair of the 89170-52N10 work?

First have the fault memory read out and enclose the log with the unit. Then disconnect the battery and only afterwards remove the control unit 89170-52N10. Then create a repair order online and send the unit in, well packed.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Processing usually takes 3–4 working days.

Your own unit is then 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 89170-52N10 get to Airbag24?

You send the control unit 89170-52N10 by parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings it back to you.

Enclose the printed repair order with the parcel, and pack the unit shockproof.