Airbag control unit with part number 89170-48600

What does the airbag control unit 89170-48600 do?

The airbag control unit 89170-48600 coordinates the restraint system (SRS) at Lexus. It detects an impact via the crash sensors, determines within milliseconds the triggering of airbags and seatbelt pretensioners, and checks the system continuously. Detected faults are passed on to the driver via the airbag warning light.

The crash sensors continuously supply measurements to the unit. Without this evaluation the system would not know when to act.

After an accident the unit stores crash data and locks itself.

Why does the control unit 89170-48600 fail?

Stored crash data is the most common cause, even if no airbag was triggered after an accident. A normal diagnostic tool does not delete it. Other causes include aged electronics, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

This data stays in the unit, even if the vehicle continues to be used after the accident.

Electronic components also age over time. Solder joints can be cold without any visible sign, and moisture or corrosion disturb the contact at plug connections.

Voltage spikes, for example from a weak battery or jump start, stress the circuit in the control unit.

How can you tell that the 89170-48600 is defective?

The airbag warning light in the instrument cluster lights up continuously or intermittently, and a fault message appears at the same time. In addition, the diagnostic tool cannot establish a connection to the control unit.

• The airbag warning light stays on or flashes.
• A fault message appears in the instrument cluster.
• A diagnostic tool cannot reach the control unit.
• The fault memory remains unchanged.

In case of a defect, airbags and seatbelt pretensioners may not trigger in an emergency. Such an indication should therefore be checked promptly.

The warning light shows the finding as soon as the unit detects it. A disturbed connection to the diagnostic tool can also be caused by cables or plugs.

Which vehicles is the 89170-48600 fitted in?

The 89170-48600 is fitted in these vehicles: Lexus RX AL10 Facelift (2012-2015) and AL10 (2009-2012).

This selection shows which vehicles the part number fits:

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

Compare the label of the removed unit with the part number on this page. That only shows you have the right unit; nothing more follows from that comparison. Also have the fault memory read out. Only that log shows whether the control unit is defective or whether a line or plug is the cause.

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

How does the repair of the 89170-48600 work?

First have the fault memory read out, then disconnect the battery. Only then remove the control unit; the log goes into the parcel later. Processing at Airbag24 alone usually takes 3–4 working days.

Then create a repair order online and pack the unit well before sending it in. Airbag24 examines the unit on the test bench, replaces defective components, deletes stored crash data and tests the function. Afterwards your own unit is returned.

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 89170-48600 get to Airbag24?

You arrange the transport yourself by parcel, or you book a UPS collection for an extra charge. The return is made by UPS once the repair is complete.

Print the repair order and pack it together with the control unit shock-proof.