Airbag control unit with part number 3W3 959 655 A

What is the function of the airbag control unit 3W3 959 655 A?

The airbag control unit with part number 3W3 959 655 A is the central control module for the occupant safety system (SRS) in Bentley vehicles, particularly those of the Continental series. It processes signals from crash sensors to ensure precise and reliable deployment of airbags and seatbelt pretensioners in the event of a collision, thereby safeguarding occupants.

As the brain of the passive safety system, this control unit continuously monitors all connected components, including various airbags, seatbelt pretensioners, as well as acceleration and pressure sensors distributed throughout the vehicle.

The device is specifically designed for the sophisticated electronic architecture of second-generation Bentley Continental models and subsequent variants, ensuring that this complex system responds without delay in critical situations.

What defects occur in the control unit 3W3 959 655 A?

Typical defects of the control unit 3W3 959 655 A include crash data stored in its memory, which can lock the unit even when no airbags have deployed. Internal system errors are also common, leading to faulty or completely failed communication with diagnostic tools and impairing the overall functionality of the airbag system.

One of the most frequent causes of failure is the storage of crash data. Even minor collisions where airbags do not deploy can trigger what’s known as a “crash lock,” disabling further operation. While driving may still be possible, the safety system remains deactivated.

Internal malfunctions represent another widespread source of issues. These can involve various electronic components within the unit and often result in sporadic or persistent error messages that cannot be cleared.

How can you recognize a defect in the control unit 3W3 959 655 A?

A defective airbag control unit 3W3 959 655 A primarily manifests as a permanently illuminated or flickering airbag warning light on the instrument panel. Additional signs include intermittent airbag error messages on the display or a workshop’s inability to access the control unit via diagnostic equipment to read out faults.

The most obvious symptom is the activated airbag warning light, clearly indicating to the driver that there is an issue with the restraint system and that full safety is no longer guaranteed.

Sporadic error messages on the onboard computer may also suggest an emerging defect. These messages might initially appear and disappear but often become persistent over time.

A clear technical indicator is the lack of communication with the control unit. If a specialized workshop cannot establish a connection between its diagnostic tool and the SRS module, the cause is very likely an internal fault within the control unit itself.

In which Bentley models is 3W3 959 655 A installed?

The airbag control unit 3W3 959 655 A is used in several high-end Bentley models. It is primarily found in the Continental series, including the second-generation Continental GT as well as various performance variants such as the GT Speed, GTC Speed, and Supersports. Airbag24 offers repair services for all these specific models.

At Airbag24, we repair part number 3W3 959 655 A for the following Bentley models:

Bentley Continental GT, Second Generation (2003–2013)

Bentley Continental GT Speed Mk1, Mk2, and Mk3

Bentley Continental Supersports Mk2

Bentley Continental GTC Speed Mk1 and Mk2

How is the control unit 3W3 959 655 A professionally repaired?

Professional repair of the control unit 3W3 959 655 A at Airbag24 begins with precise fault diagnosis. Depending on the defect, stored crash data is erased, the airbag module is reset, and all error codes are cleared. Following successful restoration and final testing, the unit is fully functional again and ready for installation.

Upon receipt of the control unit at Airbag24, specialized technicians conduct a comprehensive analysis to determine the exact cause of the malfunction. This step is crucial for distinguishing between a simple data-storage issue and a deeper electronic fault.

The next phase involves actual repair, which includes expertly erasing stored crash data and fully restoring the module to factory settings. All saved error codes indicating the defect are also cleared.

After completing the repair, the control unit undergoes extensive functional testing to ensure flawless operation. We provide 2 years' statutory liability for defects on every repair.