Airbag control unit with part number 89170-52300

What does the airbag control unit 89170-52300 do?

The 89170-52300 is the control unit that coordinates the airbags and seatbelt pretensioners in the restraint system (SRS) of Toyota. It evaluates the crash sensors, decides within milliseconds on triggering, and monitors the system continuously.

The sensors supply measured values constantly, from which the unit derives how an impact develops. If it detects a fault, it stores it and shows it via the airbag warning light.

After an accident, it stores crash data and is locked afterwards. Only the repair ends this lock.

Why does the control unit 89170-52300 fail?

Crash data from an earlier accident is the most common cause of the 89170-52300, even if no airbag was triggered in that accident. Added to this are ageing electronic components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

Ordinary diagnostic tools cannot delete this crash data. Airbag24 deletes it during the repair.

The other causes concern the electronics themselves or their connections. Components age, solder joints can go cold, and moisture and corrosion disturb the contacts. Voltage spikes, for example from a weak battery or a jump start, additionally strain the unit.

How can you tell that the 89170-52300 is defective?

The airbag warning light in the instrument cluster stays on constantly or intermittently and shows an error message. In addition, the diagnostic tool cannot establish a connection to the 89170-52300, and the fault memory cannot be cleared.

The airbag warning light is a clear hint from the vehicle. As long as the fault exists, airbags and seatbelt pretensioners may not deploy in an emergency.

Error messages in the instrument cluster and a fault memory that cannot be emptied are a clear prompt to have the finding checked.

Which vehicles is the 89170-52300 fitted in?

The 89170-52300 is fitted in these vehicles: Toyota Echo XP10 (1999-2002) and XP10 Facelift (2002-2005).

The following overview shows the models assigned to this part number.

• Toyota Echo XP10 (1999-2002)
• Toyota Echo XP10 Facelift (2002-2005)

Compare the part number on the label of the removed unit with this page. That tells you that you have the correct unit. Have the fault memory read out beforehand, because the result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-52050, 89170-52310-93C56.

How does the repair of the 89170-52300 work?

First have the fault memory read out; the log goes with the unit later. Then disconnect the battery and only then remove the 89170-52300. Finally, create the repair order online and send in the unit well packed.

Processing at Airbag24 usually takes 3–4 working days.

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 89170-52300 get to Airbag24?

You send the 89170-52300 as a parcel or with a UPS collection booked for an extra charge. The return after the repair is made by UPS.

Enclose the printed repair order in the parcel. Pack the unit shockproof.