Airbag control unit with part number 89170-11010

What does the airbag control unit 89170-11010 do?

The airbag control unit 89170-11010 controls the restraint system (SRS) of Lexus. From the signals of the crash sensors it calculates, in a fraction of a second, whether and which airbags and seatbelt pretensioners are triggered in an accident.

During operation, the unit continuously checks the entire chain of sensors, wiring and triggers. If it detects a fault, it switches on the airbag warning light in the instrument cluster.

After an accident, it secures crash data and is locked afterwards.

Why does the control unit 89170-11010 fail?

On the control unit 89170-11010, the most common cause is a stored crash data record from an earlier accident, even if no airbag was triggered. A normal diagnostic tool cannot remove it. Other causes include aged components, cold solder joints, corrosion at plug connectors and voltage spikes.

Apart from the crash data, there are further causes, some of which overlap:

• aged electronic components
• cold solder joints
• moisture and corrosion at plug connectors
• voltage spikes, for example with a weak battery or jump-starting

Airbag24 erases the crash data during the repair. Which of the other causes applies to your unit is established by the test on the test bench.

How can you tell that the 89170-11010 is defective?

The airbag warning light in the instrument cluster lights up on the 89170-11010, either permanently or only intermittently. In addition, a fault message may appear, or the diagnostic tool may not reach the control unit. In an emergency, airbags and seatbelt pretensioners may then not trigger.

For you, the warning light is the clearest indication that something is wrong in the restraint system. The car may behave inconspicuously in everyday use, but the indication still applies.

A fault memory that cannot be cleared points to a fault that is still present. In this case, have it read out.

In which vehicles is the 89170-11010 fitted?

The control unit 89170-11010 is fitted in this vehicle: Lexus LC URZ100 (from 2017).

The following list shows the vehicles for which this part number is stored.

• Lexus LC URZ100 (from 2017)

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

For the same vehicles, we also repair control units with the part numbers 89170-11020, 89170-11140, 89970-50100.

How does the repair of the 89170-11010 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the control unit 89170-11010. Afterwards you create a repair order online and send the unit in, well packed.

At Airbag24, the unit is examined on the test bench, defective components are replaced, the crash data is erased and a function test is carried out. Processing usually takes 3–4 working days. Your own unit then 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 89170-11010 get to Airbag24?

You send the control unit 89170-11010 as a parcel to Airbag24 or book a UPS collection for an extra charge. The return is made by UPS.

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