Airbag control unit with part number 89170-35080

What does the airbag control unit 89170-35080 do?

The 89170-35080 is the airbag control unit for the restraint system (SRS) of Toyota. It continuously evaluates the signals from the crash sensors and, in an emergency, determines which airbags and seatbelt pretensioners are triggered within milliseconds. After an accident the unit stores crash data and locks itself.

On detecting a fault in the system, the unit reports it via the airbag warning light in the instrument cluster. This lets you recognise that the restraint system is not in order before it matters.

Why does the control unit 89170-35080 fail?

The most common cause on the 89170-35080 is crash data stored in the unit after an accident, even if no airbag was triggered. A normal diagnostic tool cannot delete it. Airbag24 removes it during the repair.

Besides this, electronic components age over time, and cold solder joints can cause contact problems. Moisture and corrosion at plug connections are also typical causes.

Voltage spikes can also affect the unit, for example if the battery is weak or a jump start was needed. The exact cause in each case is only established by the check.

How can you tell that the 89170-35080 is defective?

A defect on the 89170-35080 is indicated by the airbag warning light in the instrument cluster, which may light up permanently or intermittently. In addition there may be a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

Such signs mean that airbags and seatbelt pretensioners may fail to trigger in an emergency. A check should therefore be carried out promptly.

Which vehicles is the 89170-35080 fitted in?

The unit 89170-35080 from Toyota is fitted in these vehicles: Toyota 4Runner N210 (2002-2005) and N210 Facelift (2005-2009).

The list below shows the vehicles:

• Toyota 4Runner N210 (2002-2005)
• Toyota 4Runner N210 Facelift (2005-2009)

Comparing the part number on the label of the removed unit with this page only confirms that you have the right unit. Whether the unit itself is defective is shown only by the fault memory read out beforehand. A plug or a cable can just as well be the cause.

For the same vehicles, we also repair control units with the part numbers 89170-35210.

How does the repair of the 89170-35080 work?

Have the fault memory read out first and enclose the log before you disconnect the battery. Only then remove the control unit. Processing at Airbag24 usually takes 3–4 working days.

Then create a repair order online and send the unit in well packed. Airbag24 examines it on the test bench, repairs defective components, deletes the crash data and carries out a functional test.

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 89170-35080 get to Airbag24?

You send the 89170-35080 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 sends it back to you by UPS.

Enclose the printed repair order with the unit and pack it shockproof.