Airbag control unit with part number 89170-60251

What does the airbag control unit 89170-60251 do?

The 89170-60251 coordinates the restraint system (SRS) for Lexus. It evaluates the crash sensors, decides within milliseconds in an accident on the triggering of airbags and seatbelt pretensioners, and reports faults to the airbag warning light. After an accident it stores crash data and locks itself.

Monitoring runs throughout operation. For this, the control unit checks sensors, wiring and output stages, and deviations are stored as faults in the memory.

Why does the control unit 89170-60251 fail?

The most common cause on the 89170-60251 is crash data stored after an accident, even when no airbag has deployed. A normal diagnostic tool cannot erase this crash data.

Besides the crash data, ageing components, cold solder joints, moisture and corrosion on plug connections can be causes. Voltage spikes arise, for example, from a weak battery or from jump-starting.

Which of these causes is present is shown only by reading out the fault memory.

How can you tell that the 89170-60251 is defective?

On the 89170-60251, a defect is recognised by the airbag warning light, which lights up permanently or intermittently in the instrument cluster, and by a fault message in the instrument cluster. A diagnostic tool without connection to the control unit and a fault memory that cannot be emptied also indicate this.

In an emergency, airbags and seatbelt pretensioners may then not deploy. The signs at a glance:

• airbag warning light in the instrument cluster, permanently or intermittently
• fault message appearing in the instrument cluster
• no communication between diagnostic tool and control unit
• fault memory that cannot be emptied

Which vehicles is the 89170-60251 fitted in?

The 89170-60251 was built for Lexus. It is fitted in these vehicles: Lexus GX J120 (2003-2009).

The vehicles in which this unit is fitted are listed below:

• Lexus GX J120 (2003-2009)

Comparing the part number on the label of the removed unit with this page only confirms the correct unit. Before removing anything, have the fault memory read out, because only that shows whether the control unit is defective or whether a plug or a cable is the cause.

How does the repair of the 89170-60251 work?

First have the fault memory read out and attach the log, then disconnect the battery and remove the 89170-60251. Then create a repair order online and send the unit in well packed.

Airbag24 then checks it on the test bench, repairs defective components, deletes stored crash data and carries out a function test.

Processing at Airbag24 usually takes 3–4 working days, before your own unit is sent back.

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 89170-60251 get to Airbag24?

You send the 89170-60251 as a parcel to Airbag24 or book a UPS collection for an extra charge. After the repair, Airbag24 returns the unit by UPS.

Pack the control unit shockproof and put the printed repair order in the parcel.