Airbag control unit with part number 89170-76150

What does the airbag control unit 89170-76150 do?

The airbag control unit 89170-76150 acts as the central unit controlling the restraint system (SRS) of Lexus. It processes the signals from the crash sensors and triggers the appropriate airbags and seatbelt pretensioners within fractions of a second in an accident.

It also monitors all components of the system continuously and displays faults via the airbag warning light.

After an accident the unit stores crash data and locks itself. You will find more on crash data in the next section.

Why does the control unit 89170-76150 fail?

Stored crash data is the most common cause, even if no airbag has deployed; it cannot be cleared with an ordinary diagnostic tool. In addition, ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes come into consideration.

The crash data is bound to the unit and stays there until it is removed during the repair. A standard diagnostic tool cannot do this.

Ageing components and cold solder joints are typical weak points of electronic assemblies. Moisture and corrosion at plug connections impair the contact.

Voltage spikes, as occur with a weak battery or a jump-start, additionally stress the electronics.

How can you tell that the 89170-76150 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently, and the instrument cluster shows an error message. In addition, the diagnostic tool cannot reach the control unit, and the fault memory remains in place.

If the warning light is on, that is a clear signal that something in the system is wrong. In an emergency, the airbags and seatbelt pretensioners may then not deploy.

Therefore have the vehicle checked promptly.

Which vehicles is the 89170-76150 fitted in?

The 89170-76150 is fitted in these vehicles: Lexus CT ZWA10 (2011-2022).

The following overview shows which vehicles belong to this part number:

• Lexus CT ZWA10 (2011-2022)

Comparing the part number on the label of the removed unit with this page helps you recognise the right unit. Whether the control unit is defective or a plug 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 89170-02C30, 89170-76160, 89170-76210, 89170-76220.

How does the repair of the 89170-76150 work?

First have the fault memory read out and enclose the log before disconnecting the battery. Then remove the control unit, create the repair order online and send the unit in, well packed. At Airbag24, testing, repairing and checking usually take 3–4 working days.

Airbag24 examines the unit on the test bench. Where necessary, defective components are replaced, the crash data is erased and a function test is carried out. 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 89170-76150 get to Airbag24?

You can send the unit as a parcel or arrange a UPS collection for an extra charge. Airbag24 returns the unit by UPS after the repair. Put the printed repair order into the parcel and pack the unit shock-resistant.

A parcel with enough padding protects the control unit on its way to us.