Airbag control unit with part number 89170-53320

What does the airbag control unit 89170-53320 do?

In Lexus, the 89170-53320 is the control unit through which airbags and seatbelt pretensioners are triggered in an emergency. It processes the crash sensors, decides within milliseconds and checks the other components of the system continuously.

If it reports a fault, the airbag warning light appears. After an accident, the unit stores crash data and locks itself.

While driving, nothing of this is noticeable.

Why does the control unit 89170-53320 fail?

The most common cause is crash data from an accident, even if no airbag has deployed; a normal diagnostic tool does not erase them. In addition, ageing electronics, cold solder joints, moisture, corrosion at plug connections and voltage spikes come into consideration.

• Electronic components that age over time
• Cold solder joints
• Moisture and corrosion at the plug connections
• Voltage spikes, for example from a weak battery or a jump start

Which of these causes applies is determined by the test on the test bench, not by looking from outside.

Airbag24 removes crash data during the repair.

How can you tell that the 89170-53320 is defective?

A defect in the 89170-53320 is indicated by the airbag warning light in the instrument cluster, which may light up permanently or intermittently, and by side effects in the operation of the diagnostic tool.

• Airbag warning light stays on permanently in the instrument cluster
• Airbag warning light lights up intermittently
• Fault messages in the instrument cluster
• No connection between diagnostic tool and control unit
• Fault memory that cannot be erased

With these signs, airbags and seatbelt pretensioners may not trigger in an emergency. Whether the control unit itself is affected remains open until the read-out.

Which vehicles is the 89170-53320 fitted in?

The 89170-53320 is fitted in these vehicles: Lexus IS XE30 Facelift (2016-2020) and XE30 (2013-2016).

The assignment records these vehicles for this number:

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

Two checks are helpful. Comparing the part number on the removed unit with this page shows that you have the right unit. Reading out the fault memory, by contrast, shows whether the control unit is defective or a plug or cable is the cause; it therefore takes place before removal.

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 89170-53320 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, and only then remove the control unit. Next, create a repair order online and send the unit in well packed.

At Airbag24, the unit is checked on the test bench, defective components are repaired, crash data are erased and a function test follows. The unit then returns to you.

Processing at Airbag24 usually takes 3–4 working days. This refers exclusively to testing, repairing and checking.

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 89170-53320 get to Airbag24?

You send the 89170-53320 by parcel, or you book a UPS collection for an extra charge. The return after the repair is made by Airbag24 via UPS.

Include the printed repair order in the parcel and pack the unit shock-proof.