Airbag control unit with part number 89170-11080

What does the airbag control unit 89170-11080 do?

The airbag control unit 89170-11080 belongs to the restraint system (SRS) of Lexus. It measures the signals from the crash sensors, decides within milliseconds in an accident which airbags and seatbelt pretensioners are triggered, and checks the system constantly. It indicates detected faults via the airbag warning light.

The control unit runs unobtrusively while driving and only becomes noticeable when a fault occurs.

After an accident the unit stores crash data and locks itself. Only a repair lifts the lock.

Why does the control unit 89170-11080 fail?

The most common cause of a failure of the control unit 89170-11080 is crash data from memory, even when no airbag has fired. A normal diagnostic tool cannot remove this data.

An accident leaves these entries behind, and Airbag24 removes them as part of the repair.

Other causes are aged electronic components and cold solder joints. Added to these are moisture and corrosion at plug connections, as well as voltage spikes, for example from a weak battery or jump starting.

How can you tell that the 89170-11080 is defective?

The airbag warning light in the instrument cluster stays on constantly or comes on intermittently as soon as the control unit 89170-11080 has reported a fault. Add to this an error message and a fault memory that cannot be emptied.

In that case airbags and seatbelt pretensioners may not trigger in an emergency. The fault is therefore no minor matter, but a clear warning.

When this indicator appears, have the fault memory read out before planning any further steps.

Which vehicles is the 89170-11080 fitted in?

The control unit 89170-11080 is fitted in these vehicles: Lexus LC URZ100 (from 2017).

The overview below lists the vehicles for which this unit is intended.

• Lexus LC URZ100 (from 2017)

Matching the part number on the removed unit with this page gives certainty that it is the correct unit. Whether it is defective can only be answered by the read-out fault memory, because a plug or a cable can equally be 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 89170-11080 work?

For the control unit 89170-11080 a fixed sequence applies: first have the fault memory read out and attach the log, then disconnect the battery and only then remove the unit. At Airbag24 processing usually takes 3–4 working days.

Next, create the repair order online and pack the unit well before sending it. Airbag24 checks it on the test bench, replaces defective components, erases the crash data and carries out a function test.

The unit then goes back to you. The 3–4 working days refer only to checking, repairing and testing.

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 89170-11080 get to Airbag24?

You send the control unit 89170-11080 to Airbag24 as a parcel; alternatively, UPS collects it for an extra charge. After the repair Airbag24 sends it back to you by UPS.

The printed repair order goes into the parcel, and the unit must be packed shock-proof.