Airbag control unit with part number 89170-33580

What does the airbag control unit 89170-33580 do?

The airbag control unit 89170-33580 forms the control centre of the restraint system (SRS) in Lexus vehicles. It evaluates the signals from the crash sensors and determines in an accident which airbags and seatbelt pretensioners are triggered.

The unit checks the system continuously during operation. If it detects a fault, the airbag warning light in the instrument cluster lights up.

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

Why does the control unit 89170-33580 fail?

The most common cause for the 89170-33580 is crash data from an accident, which is stored even if no airbag has deployed. A normal diagnostic tool cannot erase it. Other causes are ageing components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes.

Crash data is one of the reasons why a unit no longer responds to diagnosis after an accident. Airbag24 erases the data during the repair.

Ageing components and cold solder joints develop over years. Moisture can get in wherever plugs are exposed to the environment. Voltage spikes occur, for example, with a weak battery or when jump-starting.

How can you tell that the 89170-33580 is defective?

A defect on the 89170-33580 shows as an airbag warning light in the instrument cluster that stays on permanently or intermittently. In addition an error message appears, a diagnostic tool has no connection, and a fault memory cannot be cleared.

The warning light is the control unit's direct indication of its own condition. That is why it is worth a brief look at the instrument cluster after every start.

As long as the fault persists, airbags and seatbelt pretensioners may not trigger in an emergency.

Which vehicles is the 89170-33580 fitted in?

The 89170-33580 is fitted in these models: Lexus ES GSV40 (2006-2009) and GSV40 Facelift (2009-2012).

The vehicles for this unit are listed here:

• Lexus ES GSV40 (2006-2009)
• Lexus ES GSV40 Facelift (2009-2012)

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

For the same vehicles, we also repair control units with the part numbers 150300-3243, 89170-33570, 89170-33660, 89170-33860, 89170-33A40.

How does the repair of the 89170-33580 work?

First read out the fault memory and enclose the log. Then disconnect the battery and only then remove the unit. Next, create a repair order online and pack the unit well before sending it in.

Airbag24 tests the unit on the test bench, repairs defective components and carries out a function test. Processing at Airbag24 usually takes 3–4 working days. 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 89170-33580 get to Airbag24?

You can send the control unit 89170-33580 in as a parcel or book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Put the printed repair order into the parcel and pack the unit shock-proof.