How to Manually Deactivate the MG 3 Anti-Theft System?
3 Answers
First, locate the wiring distribution of the anti-theft system, which is generally found beneath the steering wheel or inside the protective panel under the A-pillar. Then, simply disconnect the input wire of the anti-theft device, rendering it ineffective at this point. Some anti-theft devices are equipped with fuse protection. In such cases, you need to locate the corresponding fuse position and remove it, effectively deactivating the car's anti-theft system.
I encountered an anti-theft lock issue while driving my MG3. The manual override method involves using the physical key in the driver's door lock cylinder: First, close all windows and doors to avoid interference, then turn the key several times to lock and unlock the car, simulating a remote signal. After that, sit in the car, insert the key into the ignition switch, turn it to the ACC position without starting the engine, and wait about 10 seconds for the system to reset and recognize. If the alarm is still sounding, repeating the operation two or three times usually works; the anti-theft system sometimes triggers falsely due to vibrations or low temperatures, so choosing a stable parking surface can prevent this. Additionally, check the key battery, as low power can cause the remote to fail and rely on manual methods. I recommend regularly cleaning the door lock mechanism to prevent rust and dirt buildup, as proper maintenance can reduce the risk of malfunctions. If multiple attempts are ineffective, don't force it—seek help from a professional technician to avoid damaging the electronic module. Remember, it's a simple operation but requires a bit of patience.
Manually deactivating the MG3 anti-theft system is quite practical: Simply prepare the mechanical key, close all doors and windows, insert the key into the door lock, and turn it left and right a few times to perform the locking/unlocking action. This sends a pulse signal to the body control unit. Then, sit in the car, insert the key, turn it to the ON position without starting the engine, and wait 20 seconds for the anti-theft module to complete its self-check. The system is designed with a mechanical backup channel to handle remote control failures, commonly seen when the key fob battery is dead or signals are interfered with. I also recommend simultaneously checking the battery status and whether wiring connectors are loose, as these minor issues are often overlooked and can lead to locking problems. The manual method isn't foolproof but usually works. If ineffective, it indicates potential sensor or circuit malfunctions - don't delay seeking a repair shop diagnosis to prevent further damage, and always prioritize staying calm and safe.
