Airbag control unit with part number 89170-30710

What does the airbag control unit 89170-30710 do?

The airbag control unit 89170-30710 controls the restraint system in vehicles from Lexus. It evaluates the signals from the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system without a break.

Detected faults are passed on to the driver via the airbag warning light. The monitoring runs unnoticed in the background for this purpose.

After an accident, it stores crash data and locks itself. The repair lifts the lock.

Why does the control unit 89170-30710 fail?

The most common cause of a fault in the 89170-30710 is crash data stored after an accident, even if no airbag has triggered; a normal diagnostic tool cannot remove it. Other causes are aged components, cold solder joints, moisture and corrosion on plugs, and voltage spikes.

• aged components
• cold solder joints
• moisture and corrosion on plugs
• voltage spikes, for example from a jump start or a weak battery

An airbag that has not triggered does not rule out crash data in the memory. A fault search therefore checks this point first.

The other causes affect the electronics and their connections and cannot be assigned individually without a read-out.

During the repair, Airbag24 erases the crash data.

How can you tell that the 89170-30710 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-30710 permanently or intermittently. A fault message appears in the instrument cluster, the diagnostic tool gets no connection to the control unit, and the fault memory cannot be cleared. Airbags and seatbelt pretensioners may then possibly not trigger in an emergency.

• warning light permanently or intermittently on
• fault message in the instrument cluster
• diagnostic tool without connection to the control unit
• fault memory cannot be cleared

If you notice such signs, have the system checked promptly, individually or together.

Whether the control unit itself or a cable is defective only becomes clear from reading out the fault memory.

Which vehicles is the 89170-30710 fitted in?

The 89170-30710 is fitted in these vehicles: Lexus GS S190 Facelift (2009-2011) and S190 (2005-2009).

The list shows which vehicles this part number is assigned to:

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

A comparison of the part number on the label with this page only ensures that the unit fits. Have the fault memory read out in advance as well; the log 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 89170-30710 work?

Processing at Airbag24 usually takes 3–4 working days. At the start, the fault memory is read out, and the log is enclosed with the unit. Only once the battery is disconnected is the control unit 89170-30710 removed. Finally, send it in packed with a repair order created online.

Airbag24 checks the unit on the test bench, repairs defective components, erases the crash data and carries out a function test. Afterwards, your own unit comes back 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 89170-30710 get to Airbag24?

You send a parcel containing the control unit 89170-30710 to Airbag24, or you book a UPS collection for an extra charge. The return after the repair is also made by UPS.

The printed repair order goes into the parcel. Pack the control unit shock-proof.