Airbag control unit with part number 89170-F4130

What does the airbag control unit 89170-F4130 do?

Within the restraint system (SRS) of Toyota, the airbag control unit 89170-F4130 takes over control. It receives the signals from the crash sensors, selects the appropriate airbags and seatbelt pretensioners within milliseconds in an accident, and monitors everything continuously.

If the unit detects a fault, it reports it via the airbag warning light in the instrument cluster. The sensors supply measured values, while the decision in a crash is made in the control unit.

After an accident, the unit records crash data and locks itself. The following section deals with causes and signs of recognition.

Why does the control unit 89170-F4130 fail?

Crash data stored after an accident is the most common cause on the 89170-F4130, even if no airbag has fired. Other causes include ageing electronics, cold solder joints, moisture together with corrosion at plug connections, and voltage spikes.

Stored crash data cannot be deleted with a normal diagnostic tool. It therefore remains until Airbag24 removes it during the repair.

Ageing electronic components and cold solder joints lead to faults that can occur even without an accident. Moisture and corrosion at the plug connections worsen the contact.

Voltage spikes from a weak battery or jump-starting place additional strain on the circuit.

How can you tell that the 89170-F4130 is defective?

The airbag warning light in the instrument cluster indicates a defect on the 89170-F4130 when it stays on permanently or comes on intermittently. This is accompanied by fault messages in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared.

The warning light is the visible side of the system's self-monitoring. As long as it is lit, the airbags and seatbelt pretensioners may not trigger in an emergency.

If the diagnostic tool does not communicate with the control unit, a connector or a cable may be the cause. Which area is affected is only shown by the fault memory once it has been read out.

Which vehicles is the 89170-F4130 fitted in?

The control unit 89170-F4130 is fitted in these vehicles: Toyota C-HR NGX10 (2017-2019).

This list names the vehicles for this part number.

• Toyota C-HR NGX10 (2017-2019)

A comparison of the part number with this page ensures that you have the right unit in front of you. Whether the control unit is defective or a connector or cable is the cause is only answered by the fault memory, which you should have read out beforehand.

For the same vehicles, we also repair control units with the part numbers 89170-F4210, 8917010110.

How does the repair of the 89170-F4130 work?

You read out the fault memory of the 89170-F4130 first and enclose the log. Then disconnect the battery, remove the control unit and create a repair order online. Finally, send the packed unit in.

The steps must follow exactly this order so that the removal from the airbag system is carried out safely.

At Airbag24 the unit is checked, defects are fixed, the crash data is deleted and a functional test is carried out. Processing usually takes 3–4 working days. Your own unit is returned afterwards.

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-F4130 get to Airbag24?

You send the control unit 89170-F4130 as a parcel or, for an extra charge, book a UPS collection. Airbag24 returns it to you by UPS after the repair.

For shipping, pack the control unit shock-proof and include the printed repair order.