Airbag control unit with part number 89170-53410

What does the airbag control unit 89170-53410 do?

The airbag control unit 89170-53410 belongs to the restraint system of Lexus. It evaluates signals from the crash sensors, decides in a crash on airbags and seatbelt pretensioners, and monitors the system permanently.

Detected faults are shown via the airbag warning light. After an accident the unit records crash data and locks itself.

In normal operation you notice nothing of this.

Why does the control unit 89170-53410 fail?

After an accident, stored crash data is the most common cause with the 89170-53410, even if no airbag has deployed at all; an ordinary diagnostic tool cannot remove it. Other causes that come into consideration are aged components, cold solder joints, moisture and corrosion on plug connections, and voltage spikes.

That no airbag has deployed changes nothing about this entry.

Electronics age, solder joints can go cold, and moisture corrodes contacts. Voltage spikes, for example from a weak battery or jump-starting, also strain the unit.

How can you tell that the 89170-53410 is defective?

If the airbag warning light stays on permanently or intermittently, that indicates a defect in the 89170-53410. An error message may also appear in the instrument cluster. If a diagnostic tool cannot connect to the control unit or the fault memory cannot be cleared, airbags and seatbelt pretensioners may fail to deploy in an emergency.

The warning light is there precisely to report the defect to you before it matters in an emergency.

A prompt check is the right course of action for any fault.

Which vehicles is the 89170-53410 fitted in?

The list refers to part number 89170-53410. A control unit with this number is fitted in these vehicles: Lexus IS XE30 Facelift (2016-2020) and XE30 (2013-2016).

Here is the overview:

• 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 ensures you have the right unit in hand. Whether the control unit itself is defective or a connector or cable is the cause is shown only by the fault memory read out beforehand.

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 89170-53410 work?

Have the fault memory of the 89170-53410 read out first and attach the log. Disconnect the battery before you remove the control unit. For checking, repairing and testing at Airbag24, 3–4 working days are usually planned.

At Airbag24, the unit is checked first, then defective components are replaced, stored crash data is erased and the function is tested.

Afterwards your own unit goes 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 89170-53410 get to Airbag24?

Your control unit 89170-53410 comes to us by parcel, or you arrange a UPS collection for an extra charge. After the repair Airbag24 sends it back by UPS.

Packed shock-proof, the printed repair order goes into the parcel as well.