Airbag control unit with part number 89170-48620

What does the airbag control unit 89170-48620 do?

The airbag control unit 89170-48620 manages the restraint system (SRS) in Lexus. It processes the data from the crash sensors, selects the airbags and seatbelt pretensioners to be triggered in an accident within milliseconds, and monitors the entire system.

If it detects a fault, it indicates this via the airbag warning light.

After an accident it stores crash data and locks itself.

Why does the control unit 89170-48620 fail?

The most common cause is crash data from an accident that remains in the unit, even if no airbag was triggered. A normal diagnostic tool cannot erase it. Aged components, moisture, corrosion and voltage spikes also come into consideration.

As long as the crash data stays stored, the fault pattern does not change. The other causes concern electronic components and their connections.

Cold solder joints count among them, as do voltage spikes that arise, for example, from a weak battery or a jump start.

How can you tell that the 89170-48620 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently and thus indicates a defect. A fault message then 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 this is the case, airbags and seatbelt pretensioners may not trigger in an emergency. Take the light seriously and have it checked.

Which vehicles is the 89170-48620 fitted in?

The airbag control unit 89170-48620 is fitted in these vehicles: Lexus RX AL10 Facelift (2012-2015) and AL10 (2009-2012).

The vehicles for which this part number is on record are listed here:

• Lexus RX AL10 Facelift (2012-2015)
• Lexus RX AL10 (2009-2012)

A comparison of the part number on the label of the removed unit with this page shows you that it is the right unit. Also have the fault memory read out beforehand. The result shows whether the control unit is defective or whether a connector or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 1503001853, 8917048380.

How does the repair of the 89170-48620 work?

First have the fault memory read out and attach the log to the unit. Then disconnect the battery, only then remove the control unit, and create a repair order online. Next, send the unit in, well packed. Airbag24 usually needs 3–4 working days for processing.

The crash data is erased at Airbag24 after the unit has been examined on the test bench and defective components have been repaired. A functional test completes the work. The unit then goes back to you. The 3–4 working days refer solely to this work.

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 89170-48620 get to Airbag24?

The unit goes to Airbag24 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it by UPS.

The printed repair order belongs in the parcel. Pack the unit shock-proof before you hand it over.