These instructions apply to the BMW 2 Series Mk2 (G42) 2021-present. For other models, please choose your vehicle here.
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Your BMW 2 Series (G42, 2021–present) switches 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 — you can switch Auto Start/Stop off.
Turning It Off
- Look for the A inside a circular arrow button (often near the gear selector or by the iDrive controls) and press it once; the engine then stays running at stops.
- If your car has no physical button, open iDrive → Settings / Vehicle settings and switch Auto Start/Stop off there.
Why It Returns Each Drive
The G42 re-enables Auto Start/Stop every time you start the car. There’s no permanent factory off — switch it off again at the start of each drive if you prefer it disabled.
When It Won’t Stop the Engine
Even when active, the system holds the engine running if the 12 V battery charge is low, the cabin still needs heating or cooling, or you’re on a gradient — all normal.
Frequently Asked Questions
How do I turn off auto stop/start on a BMW 2 Series?
Press the ‘A’ circled-arrow button, or switch Auto Start/Stop off in iDrive vehicle settings.
Can I disable it permanently?
No — it re-arms at every engine start, so you set it each drive.
Why didn’t the engine stop today?
Low battery charge, climate demand or a slope keeps it running by design.
Does leaving it on harm the car?
No — it’s built for constant use, though a tired 12 V battery can make it behave oddly.
If a start/stop fault shows, it usually points to the 12 V battery — see our 2 Series 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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