Airbag control unit with part number 89170-30G10

What does the airbag control unit 89170-30G10 do?

The airbag control unit 89170-30G10 is the central control of the restraint system (SRS) of Lexus. It evaluates the signals from the crash sensors and decides in an accident within milliseconds which airbags and seatbelt pretensioners are triggered. It monitors the system continuously, and it shows faults via the airbag warning light.

The evaluation takes place in the background while the vehicle is on the move. This keeps the system ready to react in an emergency at all times.

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

Why does the control unit 89170-30G10 fail?

The most common cause is crash data that was stored after an accident, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Aged components, cold solder joints, moisture and corrosion at plugs, as well as voltage spikes also play a role.

Crash data comes first because it remains in the memory after an accident. The other causes lie in the electronics themselves and in their surroundings. Over time, components age, and moisture can attack contacts.

Voltage spikes occur, for example, when starting with a weakened battery or when jump-starting from another vehicle. Which cause applies in an individual case only becomes clear through testing.

How can you tell that the 89170-30G10 is defective?

The airbag warning light in the instrument cluster lights up permanently or only intermittently. There may also be a fault message in the instrument cluster, no connection to the diagnostic tool, and a fault memory that cannot be cleared.

With such a finding, airbags and seatbelt pretensioners may not trigger in an emergency. A lit warning light is therefore a reason to have the cause clarified promptly.

If the diagnostic tool cannot establish a connection, the cause does not automatically lie in the control unit. Cables may also be affected, and the test shows where the fault is.

Which vehicles is the 89170-30G10 fitted in?

The control unit 89170-30G10 is fitted in vehicles of this type: Lexus GS L10 (2012-2015) and L10 Facelift (2015-2020).

The list contains the vehicles recorded for this part number and serves as a guide.

• Lexus GS L10 (2012-2015)
• Lexus GS L10 Facelift (2015-2020)

First compare the part number on the label of the removed unit with this page. This only shows that it is the right unit. Also have the fault memory read beforehand, because only this result shows whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the 89170-30G10 work?

First, read out the fault memory and attach the log, then disconnect the battery. Only after that remove the control unit and create a repair order online. Airbag24 usually takes 3–4 working days to process the unit.

After it is sent in, Airbag24 checks the unit on the test bench, replaces defective components, erases stored crash data and runs a function test. Afterwards, the unit, now repaired, 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 89170-30G10 get to Airbag24?

You send the unit as a parcel or book a UPS collection for an extra charge. Airbag24 returns it by UPS after the repair.

Put the printed repair order in the parcel. Pack the control unit shockproof before handing it over.