Airbag control unit with part number 89170-48610

What does the airbag control unit 89170-48610 do?

As the airbag control unit 89170-48610, this unit manages the SRS restraint system of Lexus. It reads the crash sensors and, in an accident, determines within milliseconds which airbags and seatbelt pretensioners are triggered.

In addition, the unit continuously checks whether the system works. If it detects a fault, it shows this via the airbag warning light in the instrument cluster.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-48610 fail?

In the 89170-48610, the most common cause is stored crash data from an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase this data. Other causes include aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes, for example from a weak battery or a jump start.

Crash data is not removed by itself. It stays in the memory until it is deleted, and no triggered airbag is needed for that.

The other causes concern the electronics and their environment. Components age, solder joints can go cold, and moisture and corrosion attack the contacts.

How can you tell that the 89170-48610 is defective?

A defect in the 89170-48610 shows itself through the airbag warning light in the instrument cluster, which lights up permanently or intermittently, through an error message in the instrument cluster, and through a diagnostic tool that cannot connect to the control unit. A fault memory that cannot be cleared also counts among the signs.

A diagnostic tool that fails to reach the control unit is a clear sign of a fault in the system.

While the light is on, airbags and seatbelt pretensioners may not trigger in an emergency. That justifies a check without delay.

Which vehicles is the 89170-48610 fitted in?

The control unit 89170-48610 is fitted in these vehicles: Lexus RX AL10 Facelift (2012-2015) and AL10 (2009-2012). The assignment applies only to this control unit.

The vehicles in detail:

• Lexus RX AL10 Facelift (2012-2015)
• Lexus RX AL10 (2009-2012)

Comparing the part number on the label of the removed unit with this page only ensures that you have the correct unit in front of you. Also have the fault memory read out before removal. Only the result shows whether the control unit itself is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1503001853, 8917048380.

How does the repair of the 89170-48610 work?

First have the fault memory read out and attach the log. Then disconnect the battery, and only then remove the control unit 89170-48610. Then create a repair order online and send the unit in well packed.

Airbag24 examines the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. Afterwards your own unit is returned to you. 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 89170-48610 get to Airbag24?

Either you send the control unit 89170-48610 yourself as a package, or you book a UPS collection for an extra charge. After the repair Airbag24 sends the unit back to you by UPS.

Pack the unit shock-resistant and enclose the printed repair order.