Airbag control unit with part number 89170-24290

What does the airbag control unit 89170-24290 do?

The control unit 89170-24290 is the electronic control of the restraint system (SRS) of Lexus. It uses the crash sensors to determine whether an impact requires airbags or seatbelt pretensioners to be triggered, and it shows faults via the airbag warning light.

This evaluation takes place in the background and is not visible to you.

After an accident, the unit secures crash data, and during this phase it locks itself.

Why does the control unit 89170-24290 fail?

Crash data from an accident is the most common cause of a failure of the 89170-24290, even if no airbag was triggered; a normal diagnostic tool cannot erase it. Other causes are aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Airbag24 removes the crash data during the repair.

Aged electronics and cold solder joints disrupt the connections inside. Moisture and corrosion on the plugs worsen the contact, and voltage spikes from a weak battery or a jump start strain the circuit.

How can you tell that the 89170-24290 is defective?

On the 89170-24290, the airbag warning light in the instrument cluster signals a defect when it lights up permanently or intermittently. Other signs are an error message, a failed connection to 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 is one of the most important signals the vehicle gives.

If there is no connection to the diagnostic tool, you should have the system examined promptly.

Which vehicles is the 89170-24290 fitted in?

The assignment lists the Lexus models for which the control unit is intended. The 89170-24290 is fitted in these vehicles: Lexus RC ASC10 (2015-2018) and ASC10 Facelift (from 2018).

You will find these vehicles here:

• Lexus RC ASC10 (2015-2018)
• Lexus RC ASC10 Facelift (from 2018)

Before removal, compare the part number on the label with this page; that only confirms you have the right unit. Having the fault memory read out, on the other hand, shows whether the control unit is defective or whether a plug or cable is causing the fault.

For the same vehicles, we also repair control units with the part numbers 89170-24170, 89170-24300, 89170-24320, 89170-24340, 89170-78010.

How does the repair of the 89170-24290 work?

First have the fault memory read out and attach the log. Then disconnect the battery and remove the 89170-24290. Afterwards create the repair order online and send in the well-packed unit.

Removal only takes place after disconnecting; this is mandatory for safety reasons.

Airbag24 checks the unit on the test bench, replaces defective components, erases the crash data and carries out a function test. Airbag24 usually expects 3–4 working days for this. Afterwards your unit returns 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 89170-24290 get to Airbag24?

The 89170-24290 comes to Airbag24 by parcel; alternatively you can book a UPS collection for an extra charge. After the repair, Airbag24 sends the unit back by UPS.

Pack the control unit shock-proof and add the printed repair order.