Airbag control unit with part number 150300-8850

What is the function of Airbag Control Unit 150300-8850?

The airbag control unit with part number 150300-8850 is the central control module of the occupant restraint system (SRS) for the Toyota RAV4 of the XA30 series. It processes signals from acceleration and crash sensors to precisely deploy airbags and seatbelt pretensioners within milliseconds in the event of a collision.

As the brain of the restraint system, it continuously monitors all connected components, including front, side, and head airbags, seatbelt pretensioners, as well as their respective sensors and ignition circuits. Its primary task is to distinguish between a real accident and harmless impacts, thereby ensuring the safety of vehicle occupants.

What defects occur in 150300-8850?

The most common cause of failure is the storage of crash data after an accident, which permanently locks the control unit. Similarly, internal electronic faults result in persistent error codes such as B1000 or B1901, often preventing any communication with diagnostic equipment.

Following a collision where airbags or seatbelt pretensioners have deployed, the control unit writes so‑called “crash data” into its internal memory. For safety reasons, these data are designated by the manufacturer as non‑erasable, blocking the device’s functionality even after the vehicle has been repaired.

In addition, defects may arise in electronic components directly on the circuit board. External factors such as water damage, corrosion around the CAN bus, or reverse polarity in the power supply can also lead to irreparable damage to the control unit.

Similar issues occur with related Toyota part numbers, such as 89170-0D020, 89170-12030, 89170-30840, 152300-6912, or 152300-8964.

How do you recognize a defect in 150300-8850?

The clearest symptom is a constantly illuminated or flashing airbag warning light on the instrument cluster. Additional signs include specific, non‑erasable fault codes like “B1000 – Control Unit Defect” or “B1901,” along with complete loss of communication with the control unit via diagnostic testers.

The airbag indicator light signals a system malfunction. It may remain steadily lit, flash intermittently, or—in some cases—only illuminate after a certain delay following vehicle start-up (e.g., 30 seconds).

Another clear indication is when a workshop’s diagnostic tool (such as an OBD scanner or TECH2) cannot establish communication with the airbag control unit. The unit no longer responds to queries, making precise fault analysis impossible.

The fault memory often stores entries like “Internal Error,” “Control Unit Defect,” or specific codes from the U1XXX or B1XXX series. These cannot be cleared using standard methods and directly point to a defect within the control unit.

In which vehicles is 150300-8850 installed?

The airbag control unit 150300-8850 was specifically developed for the third generation of the Toyota RAV4. At Airbag24, we repair this control unit for the entire XA30 series, including facelift models and special trim levels such as the TRD Off-Road variant.

Specifically, this part number is used in the following models and series:

Toyota RAV4 XA30 (model years 2006–2009)

Toyota RAV4 XA30 Facelift (model years 2009–2013)

Toyota RAV4 TRD Off-Road

What are the advantages of repairing 150300-8850?

Repairing is an extremely cost-effective alternative to purchasing a new unit, which, according to the manufacturer, can cost up to €750. You save up to 90% of the expense and receive a fully functional control unit restored to factory settings, backed by 2 years' statutory liability for defects.

A new part is not only expensive but often requires vehicle‑specific coding. In contrast, repair offers a plug-and-play solution: the refurbished original control unit can simply be reinstalled without complex programming.

How is the 150300-8850 control unit professionally repaired?

Upon submission to Airbag24, the 150300-8850 control unit undergoes a professional electronic analysis. Stored crash data is completely erased, and the unit is reset to factory settings. Faulty components are identified using precision measurement techniques and replaced appropriately.

The process is clearly structured: first, ensure at a specialized workshop that the fault truly originates from the control unit. Then, carefully pack the removed unit and send it to Airbag24 along with the repair form.

Our technicians perform an incoming inspection and begin restoration work, which includes reprogramming the memory to remove crash data and replacing defective components. After successful repair and a final test, the unit is returned to the customer.

After reinstalling the unit in your vehicle, you only need to clear the system’s fault memory once. We provide 2 years' statutory liability for defects on every repair performed.