Airbag control unit with part number 89170-52100

What does the airbag control unit 89170-52100 do?

The airbag control unit 89170-52100 coordinates the restraint system (SRS) of Toyota. It reads the crash sensors, calculates within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and monitors the entire system status. After an accident, it stores crash data and locks itself.

Faults appear via the airbag warning light in the instrument cluster.

The control unit works constantly in the background and is not noticeable during normal operation.

Why does the control unit 89170-52100 fail?

The most common cause is crash data that was stored after an accident, even if no airbag was triggered; an ordinary reading device does not erase it. Aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes are also possible causes.

Crash data remains in the memory after an accident, even if no seatbelt pretensioner was triggered.

Aged components and cold solder joints cause changing faults. Moisture corrodes contacts, and voltage spikes from a weak battery or a jump start stress the electronics.

How can you tell that the 89170-52100 is defective?

A defect shows itself through the airbag warning light, which lights up permanently or intermittently. Further indications are fault messages, a failed connection to the diagnostic tool and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may not be able to trigger.

The warning light indicates a detected fault, and this can be established quickly without you having to open the unit.

If the diagnostic tool cannot establish a connection, a cable or plug may be the cause rather than the unit itself.

Which vehicles is the 89170-52100 fitted in?

The control unit 89170-52100 is fitted in these vehicles: Toyota Yaris XP10 Facelift (2003-2006) and XP10 (1998-2003).

The following shows the vehicles we know for this part number.

• Toyota Yaris XP10 Facelift (2003-2006)
• Toyota Yaris XP10 (1998-2003)

Place the part number from the label of the removed unit next to this page; then you can see whether it is the correct unit. Whether it is actually defective is only clarified by the fault memory read out, because it shows whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 2310002470, 89170-0D010, 89170-0D020, 89170-0D040, 89170-0D090, 89170-0D100.

How does the repair of the 89170-52100 work?

Before removal, have the fault memory read out and attach the log; disconnect the battery beforehand. Create the repair order online afterwards, and send in the well-packed unit. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, replaces defective components, erases crash data and runs a function test. Processing there usually takes 3–4 working days.

Afterwards the unit goes back 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 89170-52100 get to Airbag24?

Either you pack the unit as a parcel, or you arrange a UPS collection for an extra charge. The return after the repair is likewise made by UPS.

The printed repair order is enclosed in the parcel, and the unit is packed shock-proof.