Airbag control unit with part number 89170-02080

What does the airbag control unit 89170-02080 do?

The airbag control unit 89170-02080 controls the SRS restraint system in vehicles from Toyota. Based on the signals from the crash sensors, it calculates which airbags and seatbelt pretensioners to trigger in an accident, and it continuously checks the system for faults. Any faults it finds are shown via the airbag warning light.

Triggering is a decision made in milliseconds, based on measured values. Data flows constantly between the sensors and the control unit so that the unit is ready at all times.

After an accident, it stores crash data and then locks itself.

Why does the control unit 89170-02080 fail?

The most common cause is stored crash data that was created after an accident, even if no airbag was deployed. Other causes are ageing electronics, dry solder joints, moisture at plug connections, corrosion and voltage spikes.

This data remains in the unit until Airbag24 removes it during the repair. A normal diagnostic tool cannot do this.

Ageing electronics, dry solder joints, moisture and corrosion reduce the reliability of the circuit. Voltage spikes, for example from a weak battery or jump-starting, put additional strain on it.

How can you tell that the 89170-02080 is defective?

The airbag warning light is the first to indicate a fault: it either stays on permanently or lights up intermittently. It is accompanied by fault messages, a control unit that cannot be reached by the diagnostic tool, and a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The warning light belongs to the instrument cluster and is the most direct feedback from the system. As soon as the control unit detects a fault, the display reacts.

If fault messages appear in the display, it is advisable to act promptly and have the vehicle examined.

Which vehicles is the 89170-02080 fitted in?

The control unit 89170-02080 is fitted in these vehicles: Toyota Corolla E120 (2001-2004) and E120 Facelift (2004-2007). Check whether your car matches this information.

The following vehicles are known to us for this part number:

• Toyota Corolla E120 (2001-2004)
• Toyota Corolla E120 Facelift (2004-2007)

Before removal, compare the part number on the label of the unit with this page; this only confirms that it is the correct unit. Then have the fault memory read out. Only this 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 89170-02180, 89170-02240, 89170-02390, 89170-02411, 89170-02G60, 89170-12160.

How does the repair of the 89170-02080 work?

For the 89170-02080, first read out the fault memory, disconnect the battery and then remove the control unit. Then create the repair order online and send the unit off packed. Processing at Airbag24 usually takes 3–4 working days.

On the test bench, Airbag24 examines the unit and replaces defective components. Afterwards the crash data is deleted and a function test is carried out.

Afterwards your own 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 89170-02080 get to Airbag24?

You send the control unit 89170-02080 in as a parcel, or arrange a UPS collection for an extra charge. After the repair, UPS brings the unit back to you.

Place the printed repair order in the parcel and pack the unit shockproof.