Airbag control unit with part number SA311970000

What is the function of the airbag control unit SA311970000?

The airbag control unit SA311970000, also known as Delphi SA3119700-00 or Bosch 0 285 010 988, is the central control unit of the occupant protection system in the Hyundai Equus. It processes signals from acceleration and crash sensors and is responsible for precisely triggering the airbags and seatbelt pretensioners.

This component continuously monitors all safety‑related components of the restraint system. In the event of a collision, the control unit determines within milliseconds which safety devices need to be activated to provide optimal protection for occupants. Its proper functioning is therefore crucial for vehicle safety.

What defects occur in SA311970000?

The most common defect of the SA311970000 control unit is the storage of permanent crash data after an accident, leading to the system’s permanent deactivation and the illumination of the airbag warning light. Other causes include electronic faults in internal components such as chips or capacitors, which fail due to aging, voltage spikes, or corrosion.

After an airbag deployment, a so‑called crash record (error code B1620) is stored in the internal memory and cannot be erased using standard diagnostic tools. For safety reasons, the system is then locked. Only specialized repair can remove this entry and reset the device.

Electronic faults may manifest as defective processors, memory chips, or solder joints. External factors such as water damage causing corrosion at connectors, or damage to wiring and plug connections, can also impair functionality. Therefore, it is important to inspect the vehicle’s surrounding environment as well.

This control unit is closely related to other Hyundai part numbers that may exhibit similar fault patterns. These include 95910-3N010, 95910-3N250 (Siemens 5WK42995), 95910-3B150, 95910-3N000 (Bosch 0 285 010 174), and 95910-3N200 (Bosch 0 285 010 747). Precise identification must always be confirmed via the vehicle identification number (VIN).

How do you recognize a defect in SA311970000?

The most obvious symptom of a defect in the SA311970000 control unit is the permanently illuminated airbag warning light on the dashboard. Often, the control unit can no longer be accessed with a diagnostic tool, or the warning light remains active for an unusually long time—such as 30 seconds—after starting the vehicle.

A blocked control unit following an airbag deployment is clear evidence of stored crash data. At the workshop, this is confirmed by the specific error code B1620 (Stored Crash Data), which cannot be cleared through normal procedures.

Communication problems with the control unit, indicated by error code B1000 (Control Unit Communication Error), also point to an internal electronic fault. The vehicle will then report a failure of the entire restraint system.

In which models is SA311970000 installed?

The airbag control unit with part number SA311970000 was specifically designed for the Hyundai Equus models LZ and YJ, manufactured between 1999 and 2009. At Airbag24, this control unit—as well as functionally related variants—for this particular vehicle generation is professionally refurbished.

At Airbag24, we repair the SA311970000 part number for the following specific model:

Hyundai Equus (models LZ, YJ), years of manufacture 1999–2009

Due to the wide variety of variants and associated part numbers, verifying compatibility via the vehicle identification number (VIN) before repair is essential to avoid mismatches.

How does repair work at Airbag24?

After sending your removed control unit to Airbag24, a systematic diagnosis is performed to read out the error codes. Depending on the defect, stored crash data is then reset, or faulty electronic components such as chips and capacitors are expertly replaced. A final test ensures full functionality, backed by 2 years' statutory liability for defects.

The process begins with the professional removal of the control unit from the vehicle. Please send the unit securely packaged along with the completed repair order. Note that for units damaged by water or previously subjected to unsuccessful repairs, restoration may take additional time.

Our technicians conduct a thorough hardware analysis, including inspection of the circuit board, solder joints, and all relevant components. Resetting the crash data is carried out using specialized software. In cases of electronic faults, affected components are desoldered and replaced with new, high‑quality parts.

After successful repair, the control unit undergoes a comprehensive functional test to ensure it once again communicates flawlessly with the vehicle and performs its protective functions. Repair is a safe and cost-effective alternative to expensive new purchases, saving up to 90% of the cost.