Airbag control unit with part number 89170-58111

What does the airbag control unit 89170-58111 do?

The airbag control unit 89170-58111 coordinates the airbags and seatbelt pretensioners of Toyota as the SRS central unit. It measures what happens in a crash via the crash sensors and triggers the appropriate components within milliseconds. In addition, it monitors the system continuously and reports faults to the airbag warning light.

After an accident, the unit stores crash data and locks itself.

The unit works without any intervention by the driver.

Why does the control unit 89170-58111 fail?

Control unit 89170-58111 most often fails because of stored crash data that was created after an accident, even if no airbag has deployed. This data cannot be deleted with a standard diagnostic tool. Other causes are ageing, cold solder joints, moisture, corrosion and voltage spikes.

Other causes at a glance:

• ageing of the components
• cold solder joints on the circuit board
• moisture and corrosion on the connectors
• voltage spikes when starting or from a jump start

Only an inspection of the unit will establish whether any of these causes applies.

How can you tell that the 89170-58111 is defective?

A defect in the control unit 89170-58111 becomes apparent when the airbag warning light is on permanently or intermittently. Fault messages in the instrument cluster, a missing connection to the diagnostic tool and a fault memory that cannot be cleared are further signs. In an emergency, airbags and seatbelt pretensioners may then fail to deploy.

The light passes the fault on directly in the vehicle.

A diagnostic tool that cannot establish a connection also points to a fault, but that does not necessarily lie in the control unit itself.

Which vehicles is the 89170-58111 fitted in?

The control unit 89170-58111 is fitted in these vehicles: Toyota Alphard H20 (2008-2015).

The vehicles are listed here:

• Toyota Alphard H20 (2008-2015)

Use the part number on the label of the removed unit to check only whether it is the correct unit. What matters for the question of a defect is the fault memory, which you should have read out beforehand: it shows whether the control unit itself is the cause or whether a connector or a cable is.

For the same vehicles, we also repair control units with the part numbers 89170-58060.

How does the repair of the 89170-58111 work?

First have the fault memory read out and attach the log. Then disconnect the battery and only then remove control unit 89170-58111. Afterwards create a repair order online and send the unit in, packed well.

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

Processing, meaning testing, repair and function test, usually takes 3–4 working days. 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 89170-58111 get to Airbag24?

You send control unit 89170-58111 as a parcel, or you book a UPS collection for an extra charge. After the repair, Airbag24 returns it to you by UPS.

Enclose the printed repair order in the parcel and pack the unit shockproof.