Airbag control unit with part number 89170-53340

What does the airbag control unit 89170-53340 do?

In Lexus, the airbag control unit 89170-53340 connects the crash sensors with the airbags and seatbelt pretensioners. It checks their signals continuously and, in an accident, selects the appropriate restraint devices within a few milliseconds.

The state of the restraint system is monitored permanently, and faults appear via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-53340 fail?

The most common cause is crash data stored in the memory after an accident, even though no airbag was triggered. Added to this are aged electronic components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

A normal diagnostic tool cannot erase the crash data. Airbag24 erases it during the repair.

Further causes at a glance:

• Components that age over time
• Cold solder joints
• Moisture and corrosion at plug connections
• Voltage spikes, for example from jump-starting

How can you tell that the 89170-53340 is defective?

A defect becomes noticeable mainly through the airbag warning light in the instrument cluster, which lights up permanently or intermittently. Added to this are error messages in the instrument cluster, no connection between the diagnostic tool and the control unit, and a fault memory that cannot be cleared.

With such signs, airbags and seatbelt pretensioners may not trigger in an emergency. Take these signs seriously and have the system checked.

Which vehicles is the 89170-53340 fitted in?

The control unit 89170-53340 is fitted in these vehicles: Lexus IS XE30 Facelift (2016-2020) and XE30 (2013-2016).

The vehicles in detail:

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

The part number on the label of the removed unit matches this page if it is the right unit. Have the fault memory read out beforehand. Only this result shows 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 89170-53340 work?

First have the fault memory read out and attach the log. Then disconnect the battery before removing the control unit. Create the repair order online and send in the unit well packed.

Airbag24 tests the unit on the test bench, repairs defective components, erases the crash data and runs a function test.

Processing usually takes 3–4 working days and covers only this work at Airbag24. Afterwards 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 89170-53340 get to Airbag24?

You can send the unit to Airbag24 as a package, or book a UPS collection for an extra charge. After the repair, the unit is returned to you by UPS.

Include the printed repair order in the package. Pack the unit so that it is shockproof.