These instructions apply to the BMW X1 Mk2 (F48) 2015-2022.
For other models, please choose your vehicle here.
The BMW X1 (F48, 2015–2022) has Auto Start-Stop, which switches the engine off at a standstill to save fuel and reduce emissions, then restarts it as soon as you release the brake or dip the clutch. The small dip and restart you feel at junctions is the system doing its job, not a sign of trouble. Many drivers still prefer to keep the engine running — in stop-go traffic, on a hot or freezing day, or before working under the bonnet — and on the X1 you switch it off with one button.
How It Works on the X1
Auto Start-Stop only cuts the engine when a set of conditions is met: the car is fully stopped, the brake is firmly pressed (or on a manual, the gearbox is in neutral with the clutch released), the battery is well charged, and the engine and cabin are near temperature. The F48 carries an intelligent battery sensor that monitors state of charge, so the system holds off whenever a stop would leave too little reserve to fire the engine back up cleanly. That reliance on the battery is why keeping it healthy matters more than on a car without the feature.
Getting Ready
- The engine must be running — the button acts on the current drive, not a saved preference.
- Do it stationary, with the car in Park or neutral, never while moving.
- Find the AⓇ button near the start/stop switch or gear selector before you set off.
- Planning engine-bay work? Switch it off first so the engine can’t restart on its own.
How to Turn Off Auto Start-Stop
- Find the AⓇ (A with a circular arrow) button near the start/stop button or gear selector.
- Press it once — the indicator confirms Auto Start-Stop is off, and the engine will keep running when you stop.
It Resets Every Drive
Like nearly every car with this feature, the X1 re-enables Auto Start-Stop each time you switch the ignition off and on. There’s no permanent factory ‘off’ — press the button once per journey if you don’t want it. (Some cars remember the last setting via a coding change, but from the factory it defaults to on.)
Why Switch It Off?
- Before engine-bay work — stops an unexpected restart.
- Stop-go traffic — avoids constant restarts.
- Maximum cabin cooling/heating on extreme days.
It also won’t stop the engine on its own when the battery is low, the cabin needs heating/cooling, or the engine is cold — that’s normal.
If the Engine Won’t Cut Out
If the X1 has stopped shutting the engine off at junctions and you haven’t touched the button, check the common reasons before suspecting a fault:
- Weak or ageing 12 V battery — the usual culprit; the sensor suspends stops to protect the charge needed to restart.
- Cold engine — on a cold start the engine and exhaust must warm up before a stop is permitted.
- Heavy climate demand — strong heating or air-con keeps the engine running to hold the cabin temperature.
- Brake not firmly held, or on a manual the clutch not fully released in neutral.
- Steering on the move or not fully stopped — the car needs a clear standstill signal.
- Recent battery disconnect — the charge sensor needs a few normal drives to relearn before it trusts a stop.
- Bonnet or driver’s door open, belt unbuckled — safety interlocks hold the engine running.
What Happens Next
After you press the button the indicator shows Auto Start-Stop is off, and the engine idles normally at every stop for the rest of that drive. There is no warning light and nothing is stored as a fault — the car simply behaves like a vehicle without the feature until the next ignition cycle. Start the X1 again and the system returns to on, so make the single button-press part of your routine if you always want it off.
Frequently Asked Questions
How do I turn off Auto Start-Stop on a BMW X1?
With the engine running, press the AⓇ button near the start/stop switch or gear selector. The indicator confirms it is off and the engine will idle at every stop. The setting lasts only for the current journey.
Can I disable it permanently?
From the factory the X1 resets Auto Start-Stop to on each drive, so there is no dashboard toggle that sticks. A coding change can make the car remember your last setting, but without that you simply press the button once per journey to keep the engine running.
Why did it come back on?
Switching the ignition off and on re-enables it automatically — it does not turn itself back on mid-drive. If you stopped and restarted the engine for any reason, the default returned, so you will need to press the button again for the next leg.
Why won’t the engine stop sometimes?
A low battery, a cold engine or strong climate demand will each hold the engine running even with the system active. That is by design to protect the battery and keep you comfortable. Once the car is warm and the battery well charged, normal stops usually resume.
Is leaving Start-Stop on bad for the engine?
No. The F48’s starter and battery are built for frequent restarts, so leaving the system on causes no extra wear. Turning it off is purely a preference for smoothness or comfort — both settings are perfectly safe to use.
Does the diesel X1 behave differently?
The button and logic are the same across petrol and diesel F48 models. A diesel may take slightly longer to allow stops on a cold morning because it warms up more slowly, but the same inhibit conditions — battery charge, temperature and climate demand — apply to both.
If a start-stop fault light shows instead of the normal indicator, look it up on autodtcs.com — a tired 12 V battery is the usual cause. See our X1 battery guide.
Independent guide — not affiliated with BMW. Always follow your official service manual and safety precautions. Read our full disclaimer.