Airbag control unit with part number 89170-53280

What does the airbag control unit 89170-53280 do?

The airbag control unit 89170-53280 is the control unit of the restraint system (SRS) in Lexus, which in a crash decides within milliseconds on the triggering of airbags and seatbelt pretensioners. To do this it evaluates the crash sensors and monitors the entire system. If it detects a fault, it shows it via the airbag warning light.

After an accident the control unit stores crash data and locks itself. During other operation, monitoring runs unnoticed in the background.

Why does the control unit 89170-53280 fail?

The most common cause is crash data stored in memory after an accident, even if no airbag deployed. A normal diagnostic tool cannot erase it. Aged electronic components, cold solder joints, moisture and corrosion on plug connectors, and voltage spikes are also possible causes.

There is no mandatory link between triggering and a memory entry; one can be present without the other.

Moisture and corrosion attack plug connectors, electronic components age, and voltage spikes affect the electronics.

How can you tell that the 89170-53280 is defective?

A defect in 89170-53280 shows first on the airbag warning light in the instrument cluster. In addition there may be an error message, a lack of contact between the diagnostic tool and the control unit, or a fault memory that cannot be cleared. In an emergency, airbags and seatbelt pretensioners may then fail to trigger.

• Airbag warning light in the instrument cluster is on permanently or intermittently
• Error message in the instrument cluster
• Diagnostic tool receives no connection to the control unit
• Fault memory cannot be cleared

If any of these indications appears, have the fault checked promptly.

Which vehicles is the 89170-53280 fitted in?

The vehicle details come from our data on this part number. Control unit 89170-53280 is fitted in these vehicles: Lexus IS XE20 (2005-2009) and XE20 Facelift (2010-2013).

These vehicles are recorded for this part number:

• Lexus IS XE20 (2005-2009)
• Lexus IS XE20 Facelift (2010-2013)

First compare the part number on the label of the removed unit with this page: this confirms that you have the right unit in front of you. Then have the fault memory read out, as only this result shows whether the control unit is defective or whether a plug or cable is the cause.

For the same vehicles, we also repair control units with the part numbers 89170-53110, 89170-53480, 89170-53490, 89170-53540, 89170-53560, 89170-53570.

How does the repair of the 89170-53280 work?

First have the fault memory read out and enclose the log. Then disconnect the battery, remove the control unit 89170-53280 only afterwards and create a repair order online. Pack the unit well and send it in.

At Airbag24 the unit is first examined, then defective components are repaired, the stored crash data is deleted and a function test is run. Afterwards your own unit is returned to you.

Processing at Airbag24 usually takes 3–4 working days; this time covers testing, repairing and checking alone.

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 89170-53280 get to Airbag24?

You send a parcel to Airbag24, or you book a UPS collection for an extra charge. After repair, Airbag24 sends the control unit back to you by UPS.

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