Airbag control unit with part number 89170-48D30

What does the airbag control unit 89170-48D30 do?

The airbag control unit 89170-48D30 coordinates the SRS restraint system in Lexus vehicles. It processes the sensor signals from the crash sensors and decides in an accident, within milliseconds, whether airbags and seatbelt pretensioners are triggered.

It detects malfunctions itself and shows them via the airbag warning light. After an accident, it records crash data and locks itself.

Why does the control unit 89170-48D30 fail?

With the 89170-48D30, the cause is most often crash data that remains in the memory after an accident, even if no airbag fired. Other causes include aged electronics, cold solder joints, wetness and corrosion on contacts, and voltage spikes.

Crash data cannot be erased with a usual diagnostic tool. Airbag24 removes it as part of the repair.

Electronics age, and solder joints can become brittle over time. This creates intermittent contacts that are hard to pin down.

Moisture and corrosion at plug connectors hinder signal transmission. Voltage spikes, for example from a weak battery or a jump-start, place additional strain on sensitive components.

How can you tell that the 89170-48D30 is defective?

A defect in the 89170-48D30 shows up through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. The instrument cluster also shows an error message, the diagnostic tool cannot reach the control unit, and the fault memory remains.

The warning light means that airbags and seatbelt pretensioners may not deploy in an emergency. Have the vehicle checked promptly.

Which vehicles is the 89170-48D30 fitted in?

These models belong to part number 89170-48D30. The airbag control unit 89170-48D30 is fitted in these vehicles: Lexus RX AL20 Facelift (2019-2022) and AL20 (2015-2019).

The vehicles at a glance:

• Lexus RX AL20 Facelift (2019-2022)
• Lexus RX AL20 (2015-2019)

First compare the part number on the label of the removed unit with this page. That way you know you have the correct unit. Afterwards, have the fault memory read out, because only that result shows whether the control unit is defective or whether plugs and cables are the cause.

For the same vehicles, we also repair control units with the part numbers 89170-0E021, 89170-0E260, 89170-48490, 89170-48890, 89170-48A00, 89170-48A10.

How does the repair of the 89170-48D30 work?

Before removal, have the fault memory read out and attach the log. Disconnecting the battery and removing the control unit follow, then you create the repair order online. Processing the 89170-48D30 at Airbag24 usually takes 3–4 working days.

This order is mandatory, because the battery must be disconnected before removal. Only then do you send the unit in.

Airbag24 examines the unit on the test bench, repairs defective components, erases the stored crash data and carries out a function test. Afterwards the unit is returned 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 89170-48D30 get to Airbag24?

You send the control unit 89170-48D30 to Airbag24 as a parcel, or you book a UPS collection for an extra charge. The return after the repair is also made by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.