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What does the uncalibrated MG Roewe SAS mean?

3 Answers

SanLondon

07/29/25 10:12am

MG Roewe SAS stands for Speed Assistance System. Speed Assistance System: When the system is in standby mode, if the turn signal is activated before crossing the lane marking, there will be no warning because the system recognizes an intentional lane change. Since this system is designed for driving on highways and well-maintained rural roads, it only becomes active when the vehicle speed exceeds approximately 65 km/h. Vehicle Assistance System: The BAS (Brake Assist System) is designed for situations where 90% of drivers in emergencies do not brake decisively enough. The Brake Assist System detects the situation the vehicle is in based on the speed at which the driver presses the brake pedal.

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MaggieRose

08/13/25 1:21pm

Recently, I encountered the 'SAS Uncalibrated' warning while driving and finally understood what it meant. This indicates that the steering angle sensor in my MG GS isn't calibrated properly, usually occurring after a battery replacement or power loss when the system loses its initial data. The sensor's role is to detect the steering wheel angle, ensuring stable operation of the electric power steering. When uncalibrated, the steering becomes heavier with insufficient assistance, and the dashboard may even light up a warning, affecting driving safety. I drove to a repair shop where the technician quickly resolved the issue by recalibrating the sensor using a diagnostic computer. Afterwards, they advised maintaining battery health and avoiding sudden power loss to prevent this issue. Simply put, if you encounter this problem, don't delay—address it early for peace of mind.

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DeHarley

10/07/25 3:34am

As an automotive system enthusiast, SAS uncalibrated refers to the steering angle sensor not being calibrated, which may be caused by ECU reset, software errors, or hardware interference. The sensor is responsible for recognizing the steering wheel position, and lack of calibration can cause the system to misjudge the angle, leading to heavy steering, unstable control, or EPS failure. From my experience, when you notice the warning, reduce your speed and drive to a professional facility for calibration using diagnostic equipment—it only takes a few minutes. In regular maintenance, keeping the electrical system stable, such as updating software and avoiding battery modifications, can reduce the likelihood of such failures. This issue is common but not complicated; timely repair ensures smooth driving.

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