Airbag control unit with part number 89170-52D50

What does the airbag control unit 89170-52D50 do?

The 89170-52D50 is the SRS control unit of Toyota. It evaluates the crash sensors and determines within milliseconds in an accident which airbags and seatbelt pretensioners are triggered.

It also monitors the entire restraint system at the same time. The unit indicates faults via the airbag warning light in the instrument cluster.

After an accident the control unit stores crash data and locks itself. This condition is one of the most important points of every inspection.

Why does the control unit 89170-52D50 fail?

Stored crash data from an accident is the most common cause with the 89170-52D50, even if no airbag was deployed. Aged components, cold solder joints, moisture and corrosion at plug connections, and voltage spikes are also possible causes.

A normal diagnostic tool cannot erase the crash data. Airbag24 therefore removes it during the repair.

The other causes are related to ageing, moisture and electrical stress. A weak battery or a jump start can trigger voltage spikes.

How can you tell that the 89170-52D50 is defective?

The airbag warning light in the instrument cluster stays on permanently or intermittently. With the 89170-52D50, a fault message, a lost connection of the diagnostic tool or a fault memory that cannot be cleared are added.

These signs show that the restraint system is not fully functional. The warning light is the clearest indication.

In an emergency, airbags and seatbelt pretensioners may fail to trigger. Such a display therefore demands prompt clarification.

Which vehicles is the 89170-52D50 fitted in?

The comparison with the vehicle data shows whether your car is affected. The 89170-52D50 is fitted in these vehicles: Toyota Yaris XP90 (2005-2009) and XP90 Facelift (2009-2011).

This list shows the vehicles:

• Toyota Yaris XP90 (2005-2009)
• Toyota Yaris XP90 Facelift (2009-2011)

First compare the part number on the label of the removed unit with this page, then you know it is the right unit. Also have the fault memory read out beforehand, because only this result shows whether the control unit is defective or whether a plug or a cable is the cause.

For the same vehicles, we also repair control units with the part numbers 212986-105, 212986-110, 220749-101, 89170-0D170, 89170-0D230, 89170-0D440.

How does the repair of the 89170-52D50 work?

First have the fault memory read out and enclose the log. Then disconnect the battery and only then remove the 89170-52D50. Next, create a repair order online and send the unit in well packed.

At Airbag24 the control unit is examined on the test bench, defective components are repaired, the crash data is erased and a function test is carried out. Processing at Airbag24 usually takes 3–4 working days. Your own unit is then returned 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 89170-52D50 get to Airbag24?

You send the 89170-52D50 as a parcel or book a UPS collection for an extra charge. Airbag24 returns the unit by UPS after the repair.

Put the printed repair order in the parcel and pack the control unit shockproof.