Airbag control unit with part number 89170-52N80

What does the airbag control unit 89170-52N80 do?

As the central control unit of the restraint system (SRS) of Toyota, the airbag control unit 89170-52N80 belongs to the components that decide on airbags and seatbelt pretensioners in an accident. It evaluates the signals from the crash sensors, determines the triggering within milliseconds and monitors the entire system. It shows faults via the airbag warning light; after an accident it stores crash data and locks itself.

Monitoring covers the sensors, seatbelt pretensioners, airbags and the connections between them, so that every deviation ends up in the fault memory.

Why does the control unit 89170-52N80 fail?

Stored crash data is the most common cause, even if no airbag fired in the accident. A normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

The crash data stays stored until Airbag24 erases it during the repair.

The other causes are aging, poor contacts and moisture. These points affect the electronics regardless of whether an accident has happened.

Voltage spikes arise, for example, from a weak battery or a jump start.

How can you tell that the 89170-52N80 is defective?

A defect first shows up as the airbag warning light in the instrument cluster, which lights up permanently or intermittently. A fault message also appears on the display, and the diagnostic tool cannot establish a connection to the control unit, while the fault memory cannot be cleared. In a real emergency, airbags and seatbelt pretensioners may therefore fail to fire.

For you, the light is the most important indication. If it lights up, have the system checked promptly.

Which vehicles is the 89170-52N80 fitted in?

The control unit 89170-52N80 is fitted in these vehicles: Toyota Aqua NHP10 1st Facelift (2015-2017), NHP10 2nd Facelift (2017-2021) and NHP10 (2011-2015). Check the list to see whether your car is among them.

The vehicles are listed here:

• 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 only confirms that you have the right unit. Have the fault memory read out beforehand.

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 89170-52N80 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 well-packed unit in. 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 runs a function test. The unit then returns to you. The 3–4 working days cover only this work.

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 89170-52N80 get to Airbag24?

You can send the control unit as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 sends it back by UPS.

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