Airbag control unit with part number 89170-30210

What does the airbag control unit 89170-30210 do?

The airbag control unit 89170-30210 is the central control unit of the restraint system (SRS) in vehicles of the Lexus brand. It evaluates the signals from the crash sensors, decides in an accident within milliseconds on airbags and seatbelt pretensioners, and monitors the system continuously. It shows faults via the airbag warning light.

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

In addition, it manages the fault memory, which can be read out during diagnosis.

Why does the control unit 89170-30210 fail?

The most common cause on the 89170-30210 is crash data stored after an accident, even if no airbag has deployed. Other causes are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes. Erasing the crash data is often not possible on this control unit. If you want the crash data erased, contact Airbag24 briefly before sending the unit in.

Whether such data is present is established by the read-out, because an airbag deployment is not a requirement for it.

Aged components and corrosion or moisture at plug connections develop over a longer period. Cold solder joints are hard to spot from the outside.

Voltage spikes, for example from a weak battery or jump-starting, strike the electronics suddenly, which is why it is worth checking the battery too.

How can you tell that the 89170-30210 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-30210 permanently or intermittently, and a fault message in the instrument cluster is added. The diagnostic tool does not find the control unit, and the fault memory cannot be erased.

Signs like these mean that airbags and seatbelt pretensioners may not deploy in an emergency.

A warning light that flashes only intermittently deserves the same attention as a permanent one, because both show the state of the system.

Which vehicles is the 89170-30210 fitted in?

Our data assigns the control unit 89170-30210 to the Lexus brand. It is fitted in these vehicles: Lexus GS S160 Facelift (2000-2005) and S160 (1997-2000).

The list below covers the vehicles for which we have this part number.

• Lexus GS S160 Facelift (2000-2005)
• Lexus GS S160 (1997-2000)

Check the part number against the label of the unit before removal. This only confirms that it is the right unit. Be sure to have the fault memory read out beforehand, because only that shows whether the control unit is defective or whether a plug or cable is the cause.

How does the repair of the 89170-30210 work?

Reading out the fault memory comes first, and the log goes into the parcel. Only after disconnecting the battery do you remove the control unit 89170-30210. The repair order follows online. Processing at Airbag24 usually takes 3–4 working days.

Airbag24 checks the control unit on the test bench, repairs defective components and runs a function test. After that, your own unit goes back to you. If you want the crash data erased, contact Airbag24 before sending the unit in.

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 89170-30210 get to Airbag24?

You send the control unit 89170-30210 as a parcel or book a UPS collection for an extra charge. Airbag24 returns it to you by UPS after the repair.

Enclose the printed repair order with the parcel, and pack the unit shock-proof.