Airbag control unit with part number 89170-53330

What does the airbag control unit 89170-53330 do?

The airbag control unit 89170-53330 belongs to the restraint system (SRS) of Lexus and continuously evaluates the data from the crash sensors. In an emergency it decides within milliseconds which airbags and seatbelt pretensioners fire, and it monitors the circuits at the same time. It indicates faults via the airbag warning light.

After an accident it stores crash data and locks itself.

Reliable electronics are important for operation, because every triggering depends on them.

Why does the control unit 89170-53330 fail?

Most common cause: crash data stored after an accident on the 89170-53330, even if no airbag has fired. Other causes include aged components, cold solder joints, moisture and corrosion, as well as voltage peaks.

The unit creates crash data during the accident, and a normal diagnostic tool cannot erase it. Further causes include:

• ageing of the electronics
• solder joints that have gone cold
• moisture or corrosion at plugs
• voltage peaks, for example after a jump start

How can you tell that the 89170-53330 is defective?

Typical signs on the 89170-53330 are an airbag warning light that stays on permanently or intermittently, an error message in the instrument cluster and a diagnostic tool that cannot connect. In addition the fault memory cannot be erased, and then airbags and seatbelt pretensioners may not be able to deploy in an emergency.

The warning light in the instrument cluster deserves attention, because it reports the defect even when the vehicle drives normally.

Note since when the light has been on and whether it stays on continuously before you remove the control unit.

Which vehicles is the 89170-53330 fitted in?

The control unit 89170-53330 is used in these vehicles: Lexus IS XE30 Facelift (2016-2020) and XE30 (2013-2016).

The following list shows the vehicles:

• Lexus IS XE30 Facelift (2016-2020)
• Lexus IS XE30 (2013-2016)

Comparing the part number on the label of the removed unit with this page only tells whether it is the correct unit. Have the fault memory read out beforehand, because only that result decides whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-53250, 89170-53370, 89170-53700.

How does the repair of the 89170-53330 work?

First have the fault memory read out and attach the log. Then disconnect the battery before you remove the control unit 89170-53330, and afterwards create a repair order online. Then send in the well-packed unit.

Airbag24 checks the control unit on the test bench, replaces defective components, deletes stored crash data and carries out a function test. Processing usually takes 3–4 working days.

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 89170-53330 get to Airbag24?

The 89170-53330 is transported as a parcel that you send yourself, or by UPS collection for an extra charge. After the repair, UPS brings the unit back.

Important are shock-proof packaging and the printed repair order in the parcel.