Airbag control unit with part number 89170-30730

What does the airbag control unit 89170-30730 do?

The airbag control unit 89170-30730 is the central control unit of the restraint system (SRS) for Lexus. It evaluates the signals from the crash sensors, decides within milliseconds in a crash on the triggering of airbags and seatbelt pretensioners, and monitors the system continuously.

Faults are reported via the airbag warning light. After a crash, the unit stores crash data and locks itself.

Why does the control unit 89170-30730 fail?

Stored crash data after an accident is the most common cause, even if no airbag has triggered. A normal diagnostic tool cannot delete this data. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Which of these causes applies in the individual case is shown only by reading the fault memory. A plug or a cable can produce warnings similar to those of the unit itself.

Voltage spikes occur, for example, with a weak battery or a jump start.

How can you tell that the 89170-30730 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently and thus shows the first sign. Also, an error message appears in the instrument cluster, there is no connection to the diagnostic tool, and the fault memory cannot be cleared.

In an emergency, airbags and seatbelt pretensioners may possibly not trigger in the event of a fault. Because the light indicates the finding, a prompt check is advisable.

Which vehicles is the 89170-30730 fitted in?

This page shows the vehicles for which this number is stored with us. The 89170-30730 is fitted in these vehicles: Lexus GS S190 Facelift (2009-2011) and S190 (2005-2009).

The vehicles are listed in the following list.

• Lexus GS S190 Facelift (2009-2011)
• Lexus GS S190 (2005-2009)

Compare the part number on the label of the removed unit with this page to recognise the right unit with certainty. Also have the fault memory read out, because only the result shows whether the control unit is defective or a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-30B30, 8917030630.

How does the repair of the 89170-30730 work?

Have the fault memory read out, attach the log, and disconnect the battery before you remove the control unit. Create a repair order online and send in the well-packed unit. At Airbag24, processing usually takes 3–4 working days.

Airbag24 checks the unit on the test bench, repairs defective components, deletes stored crash data and carries out a function test. After that, your own 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 89170-30730 get to Airbag24?

You send the unit in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shockproof.