
The inertia switch of the MG6 is located in the engine compartment. Introduction to the inertia switch: The inertia switch, also known as a threshold accelerometer, has wide potential applications in vibration and impact detection, inertial sensing, smart collision alarms in IoT fields, as well as in artillery launch systems and aerospace technology due to its passive and low-power characteristics. Working principle of the inertia switch: In the event of a severe collision, the steel ball overcomes the magnetic force of the magnet, rolls onto a conical track, and hits the target plate. This action opens the electrical contacts of the switch and cuts off the power supply to the fuel pump. After the fuel pump loses power, the engine will stop running within seconds. To restart the engine, the inertia switch must be manually reset.

I'm quite familiar with locating the inertia switch on the MG6 – it's something I frequently encounter during repairs. It's usually hidden in the trunk; lift the floor panel and check the inner side of the left wheel arch. You'll find a small square box with a red button or orange label. This switch is ingeniously designed to automatically pop up and cut off the fuel supply in case of a severe collision, preventing fuel leakage and potential fires. Last time, a car owner couldn't start their vehicle after a rear-end collision, and it turned out the inertia switch had tripped. To reset it, first turn off the engine, then press and hold the button until you hear a click to confirm it's reset. Afterward, remember to check the fuel lines for any leaks, and for vehicles involved in collisions, it's also essential to inspect the airbag system. Avoid unplugging connectors randomly, as incorrect wiring could blow a fuse.

I installed a skid plate on my MG6 last year and paid special attention to this switch when removing the trunk trim. First, you need to empty the trunk and lift the bottom cover panel. It's usually located near the left front of the spare tire well or behind the right-side interior trim panel, close to the chassis frame. The plastic square is slightly larger than a lighter and labeled 'Fuel Reset' or marked with a fuel pump icon. After a collision, it pops out to cut off fuel supply—I once triggered it when hitting a deep pothole too hard. Remember the reset steps: turn off the engine, press the switch for 5 seconds, then restart. If it trips frequently, check the chassis sensors—it might also be false triggering caused by suspension impact.

Last time when my best friend scraped the guardrail and stalled her MG6, I helped her locate the inertia switch. Its position is actually quite obvious—open the trunk, peel back the left felt liner, and you'll find a matchbox-sized black box above the spare tire with a yellow warning sticker. This device serves as an emergency fuel cut-off to protect the vehicle during hard braking or collisions. Note that there's a reset button on top of the switch; you need to press it until you hear a crisp popping sound for a successful reset. Female owners should remember to wear flat shoes when operating, as high heels can easily damage the interior panel clips. For repairs, it's recommended to let a professional handle it, as tampering by yourself might affect the vehicle's computer data.


