These instructions apply to the MG ZS Mk1 (ZS11) 2017-2021. For other models, please choose your vehicle here.
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Your MG ZS (2017–2021) with stop/start shuts the engine off at a standstill to save fuel. When you’d rather keep it running — crawling traffic, a hot day, or before any under-bonnet work — one button switches it off.
Turning Stop/Start Off
- Locate the stop/start button — an A inside a circular arrow — on the dash or centre console.
- Press it once; the indicator confirms the system is off and the engine stays running at stops.
On ZS models that route it through the touchscreen, look under Vehicle / Settings for the stop-start (engine auto-stop) toggle.
Why It’s On Again Next Time
The ZS switches stop/start back on at every ignition cycle — there’s no permanent off. Press the button at the start of each drive if you don’t want it.
When the Engine Won’t Stop Anyway
Even with the system on, the ZS keeps running if the 12 V battery charge is low, the cabin still needs heating or cooling, or you’re on a slope — all normal.
Frequently Asked Questions
How do I turn off auto stop/start on an MG ZS?
Press the ‘A’ circled-arrow button, or use the stop-start toggle in the touchscreen vehicle settings.
Can I disable it permanently?
No — it re-arms each time you start the car, so switch it off per drive.
Why didn’t the engine stop today?
Low battery charge, climate demand or a gradient keeps it running by design.
Is it bad to leave it on?
No — it’s built for constant use, though a tired 12 V battery can make it erratic.
If a stop/start fault shows, it usually points to the 12 V battery — see our ZS battery guide, or look the code up on autodtcs.com.
Disclaimer: The information on this page is provided for general guidance only. Always follow your official service manual and safety precautions when working on your vehicle. We are not responsible for errors, omissions, or any damage resulting from the use of this information.
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