Airbag control unit with part number 77960-TBA-A02

What is the function of Airbag Control Unit 77960-TBA-A02?

The airbag control unit with part number 77960-TBA-A02 is the central control module for the occupant protection system in the 10th-generation Honda Civic (2015–2022). It processes data from acceleration and crash sensors and determines, within milliseconds, whether to deploy airbags and tighten seat belts.

As a safety-critical component, it continuously monitors all elements of the restraint system. If a fault is detected, the airbag warning light on the instrument cluster illuminates to alert the driver that the system may be malfunctioning. This control unit is specifically designed for the Honda Civic’s vehicle architecture and ensures proper operation in emergency situations.

Why does control unit 77960-TBA-A02 fail?

Failures in control unit 77960-TBA-A02 often stem from internal electronic malfunctions or the storage of crash data that locks the device. Even without an actual accident, internal errors can result in crash events being logged in memory, leading to system deactivation.

A major cause is the continuous logging of crash data. Following an accident—or due to an internal fault—the control unit becomes locked and must be professionally reset. In many cases, replacement with a new unit is unnecessary.

Other failures arise from internal electronic components, which can lead to complete communication breakdowns, rendering the control unit inaccessible via the diagnostic interface. Such internal faults also prevent clearing codes stored in the fault memory.

It is important not to confuse this part number with similar variants like 77960-TGH-A02, as those are intended for different vehicle configurations and may cause system incompatibility and failures.

How do you recognize a failure in control unit 77960-TBA-A02?

The most obvious sign of a failure in control unit 77960-TBA-A02 is a permanently illuminated airbag warning light. Additional symptoms include loss of communication with the diagnostic tool, inability to clear fault codes, or secondary issues such as a non-functioning clock.

A primary symptom is the persistently lit airbag warning light on the dashboard, indicating a fault in the restraint system that should be promptly inspected at a specialized workshop, as the protective function is no longer guaranteed.

Often, no connection can be established with the control unit. Workshops discover during diagnostics that the device cannot be read via the OBD port, pointing to a severe internal electronic fault.

In some cases, fault codes stored in the error memory cannot be cleared. Even after addressing the root cause, the errors remain because the control unit is internally blocked.

Occasionally, unusual accompanying symptoms appear, such as a malfunctioning clock on the vehicle display or complete failure of the control unit when the interior temperature rises.

In which vehicles is control unit 77960-TBA-A02 installed?

The airbag control unit with part number 77960-TBA-A02 was specifically developed for the 10th-generation Honda Civic. At Airbag24, we repair this control unit for the entire model range produced between 2015 and 2022, restoring full functionality.

At Airbag24, we specialize in repairing this specific control unit for the following models:

Honda: Civic 10th Generation (model years 2015, 2016, 2017, 2018, 2019, 2020, 2021, 2022)

How does repair work at Airbag24?

Repair at Airbag24 focuses on electronically restoring your original control unit. After removal and shipment, the device is thoroughly analyzed, internal faults are corrected, and crash data is erased. Since your original part is repaired, no reprogramming or relearning is required in the vehicle.

Before removal, a diagnosis at a specialized workshop is recommended to rule out other potential causes, such as faulty sensors or cables. If the fault is clearly attributable to the control unit, it can be removed and sent in for repair.

Upon arrival at Airbag24, the control unit undergoes a detailed incoming inspection. Our technicians analyze the electronics, resolve the root cause at the component level, and use specialized software to reset stored crash data. The unit’s flawless operation is then verified on a test bench.

The key advantage of repair is that the original, vehicle-specific unit remains intact. After reinstallation, it requires no new programming or adaptation to the vehicle. We provide 2 years' statutory liability for defects on every repair.