Airbag control unit with part number 89170-52D30

What does the airbag control unit 89170-52D30 do?

The airbag control unit 89170-52D30 controls the restraint system (SRS) of Toyota. It checks the crash sensors, triggers the appropriate airbags and seatbelt pretensioners within milliseconds in an accident, and monitors the system permanently. After an accident, it stores crash data and locks itself.

The unit detects faults itself and reports them via the airbag warning light in the instrument cluster.

Why does the control unit 89170-52D30 fail?

The most common cause with the 89170-52D30 is crash data from an earlier accident, even if no airbag has deployed. An ordinary diagnostic tool cannot remove it. Other causes may come to the foreground, but are also possible.

The stored crash data remains in the unit until Airbag24 erases it during the repair. Unlike a normal wear fault, this is an entry, not component damage.

The other causes include aged electronic components, cold solder joints, and moisture and corrosion on plug connections. Voltage spikes, for example from a weak battery or jump-starting, are also possible triggers.

How can you tell that the 89170-52D30 is defective?

The defect shows itself on the 89170-52D30 through an airbag warning light that lights up permanently or intermittently, through error messages, through no connection to the diagnostic tool, and through a fault memory that cannot be cleared.

• Airbag warning light lights up permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

In an emergency, airbags and seatbelt pretensioners may not be able to deploy. A prompt check of the indication is therefore sensible.

Which vehicles is the 89170-52D30 fitted in?

The control unit 89170-52D30 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

This assignment is stored as a list:

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

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 beforehand as well; only this log shows whether the control unit itself or a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D170, 89170-0D230, 89170-0D440.

How does the repair of the 89170-52D30 work?

Read out the fault memory first, enclose the log and disconnect the battery. Only then remove the control unit 89170-52D30. Then create a repair order online and send in the well-packed unit. Airbag24 needs 3–4 working days for processing.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a functional test. Afterwards, your own unit is 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 89170-52D30 get to Airbag24?

The control unit 89170-52D30 can be sent in as a parcel, or you book a UPS collection for an extra charge. After the repair, UPS brings your own unit back.

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