Airbag control unit with part number 89170-76470

What does the airbag control unit 89170-76470 do?

In Lexus, the airbag control unit 89170-76470 evaluates the signals from the crash sensors and determines in an accident, within fractions of a second, which airbags and seatbelt pretensioners are triggered. It is also the central control unit of the restraint system (SRS). After an accident it stores crash data and locks itself.

The system checks itself continuously. The unit shows detected faults via the airbag warning light in the instrument cluster.

Why does the control unit 89170-76470 fail?

The most common cause is crash data stored after an accident, even without an airbag being triggered. In addition there are aging components, cold solder joints, moisture and corrosion at the plugs, and voltage spikes.

A normal diagnostic tool cannot erase this data.

Damp plug connections and corrosion are among the problems that develop over time. Voltage spikes, for example from a weak battery or a jump start, additionally stress the electronics.

Airbag24 erases the crash data during the repair.

How can you tell that the 89170-76470 is defective?

A defect in the 89170-76470 shows up as an airbag warning light that stays on permanently or intermittently. An error message also appears in the instrument cluster, the diagnostic tool finds no connection to the control unit, and the fault memory cannot be cleared.

As long as these signs persist, airbags and seatbelt pretensioners may not trigger in an emergency. Take the warning seriously straight away.

Which vehicles is the 89170-76470 fitted in?

The airbag control unit 89170-76470 is fitted in these vehicles: Lexus UX MZAA10 (from 2018). An overview shows whether your own vehicle is among them.

Here is the allocation in detail:

• Lexus UX MZAA10 (from 2018)

Compare the part number on the label of the removed unit with this page; this only ensures that you have the right unit. Have the fault memory read out in advance as well, because only the log shows whether the control unit is defective or whether a plug or a cable is the cause.

How does the repair of the 89170-76470 work?

First have the fault memory read out and add the log. Then disconnect the battery from the vehicle electrical system and only then remove the airbag control unit 89170-76470. Afterwards 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 and the crash data is erased. A function test follows, and your own unit is returned to you.

Testing, repair and the function test take 3–4 working days at Airbag24 as a rule. 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 89170-76470 get to Airbag24?

You can send the control unit 89170-76470 as a package, or book a UPS collection for an extra charge. Airbag24 returns the unit to you via UPS.

Pack the unit shock-resistant and include the printed repair order.