Airbag control unit with part number 8917004570

What is the function of the airbag control unit 8917004570?

The airbag control unit with part number 8917004570 is the central control module of the Supplemental Restraint System (SRS) in the Toyota Tacoma N300. It is responsible for processing sensor data, activating the airbags and seatbelt pretensioners in the event of a crash, and storing relevant crash data.

As an SRS ECU (Supplemental Restraint System Electronic Control Unit), it continuously monitors all connected components of the airbag system, including crash sensors, airbag modules, and seatbelt pretensioners.

Its primary task is to decide within milliseconds whether to deploy the airbags, ensuring optimal protection for occupants. This module is specifically designed for the vehicle architecture of the Toyota Tacoma N300 from model years 2015 to 2023 (including the facelifted version).

Why does the control unit 8917004570 fail?

The most common causes of failure for the control unit 8917004570 are stored crash data after an accident that prevents further functionality, as well as age-related defects in internal electronic components. A specific hardware fault is error code B0102, which indicates a faulty ground connection inside the housing.

After an airbag deployment, the control unit stores so‑called crash data. These data permanently lock the module and cannot be erased using standard workshop diagnostic tools. While this is a safety measure, it necessitates repair or replacement of the unit.

Another well-known defect is error code B0102, which points to a specific hardware issue—a broken or faulty ground connection directly within the control unit. This results in complete system failure and is signaled by the airbag warning light.

In addition, other electronic components such as processors, capacitors, or memory chips may fail due to aging or voltage spikes. Similar failure patterns can also be observed in related control units, such as part number 89170-04570 from the previous Toyota Tacoma N200 model.

How do you recognize a defect in the control unit 8917004570?

A defect in the control unit 8917004570 primarily manifests as a constantly illuminated airbag warning light (SRS lamp) on the instrument cluster. Other clear symptoms include loss of communication with diagnostic tools or the presence of error codes like B0102 that cannot be cleared.

The most obvious warning sign is the persistently lit SRS light. It does not turn off after starting the vehicle, indicating that the entire airbag system is disabled and will not function in the event of a crash.

Often, a workshop can no longer establish communication with the airbag control unit. The module fails to respond to requests from OBD scanners, making precise fault diagnosis via the vehicle interface impossible and pointing to a severe internal defect.

When error codes are read, specific codes such as B0102 (faulty ground connection) directly indicate a hardware issue within the control unit itself. Other messages referring to side‑impact sensors or the fuel shut-off valve may also originate from a defective control unit.

In which vehicles is the control unit 8917004570 installed?

The airbag control unit with part number 8917004570 is specifically designed for the third generation of the Toyota Tacoma pickup truck. It is used both in the original N300 model and in the later facelifted version produced from 2015 to 2023.

At Airbag24, we repair part number 8917004570 for the following models:

Toyota Tacoma N300 (model years 2015–2019)

Toyota Tacoma N300 Facelift (model years 2019–2023)

How is the control unit 8917004570 professionally repaired?

Professional repair of the control unit 8917004570 is a multi‑step process. Following an initial inspection, stored crash data is deleted, defective electronic components such as chips or ground connections are replaced, and the unit is then calibrated on a test bench and thoroughly tested for full functionality.

Upon submission to Airbag24, the control unit undergoes a comprehensive analysis to precisely identify the root cause of the fault. Communication is checked, and the fault memory is read out to verify issues such as error code B0102.

The core of the repair consists of two steps: First, permanently stored crash data is removed from the internal memory using specialized equipment. Second, identified hardware defects are addressed at the component level—for example, by reworking faulty solder joints or replacing defective chips and capacitors.

Finally, each repaired control unit undergoes a comprehensive functional test. This ensures that all sensors are properly activated and that the unit communicates flawlessly. We provide a 12-month warranty on every repair.

Is it worth repairing control unit 8917004570?

Repairing airbag control unit 8917004570 is an economically and technically sensible alternative to the costly purchase of a new part. You save 50 to 80% compared to a new component, avoid time-consuming reprogramming, and receive a fully functional, tested original part with a 12-month warranty.

The biggest advantage is the significant cost savings. While a new control unit from the manufacturer often costs over 500 euros, repair is considerably cheaper, protecting your budget without compromising safety.

Since your original control unit is repaired, all vehicle-specific data and coding remain intact. This means that after reinstallation, the unit is typically ready to use immediately (“plug-and-play”), eliminating the need for complex programming at an authorized workshop.

The repair is performed by specialized technicians according to the highest quality and safety standards and is TÜV‑compliant. It restores full functionality to the life‑saving airbag system and is backed by a 12‑month warranty, providing you with added peace of mind.

What shipping options does Airbag24 offer?

For repairing your control unit, Airbag24 provides flexible and secure shipping options. You can return the removed unit yourself free of charge or arrange a convenient UPS pickup. Return shipping is standardly free via UPS, with express and cash‑on‑delivery options available.

For outbound shipping, you have two choices: you can send the package to us yourself or use the convenient UPS pickup service, which collects the package from your preferred location. Personal drop-off at our workshop is also possible.

After successful repair, we ship your control unit back to you free of charge via standard UPS delivery.

If faster delivery is needed, you can opt for UPS Express shipping at an additional cost. Both standard and express shipments are also available as cash‑on‑delivery, allowing you to conveniently pay upon receipt. Self‑pickup of the repaired unit is another option.