These instructions apply to the Audi A3 Mk4 (8Y) 2020-Present.
For other models, please choose your vehicle here.
If the one-touch (auto up/down) windows stop working on your Audi A3 Mk4 (8Y, 2020–present) — usually after a flat or disconnected battery — the window motor has lost its learned end-stops and anti-pinch reference. Re-teaching it takes seconds per door, no tools. This is normal after any loss of power and is not a fault: the glass still moves while you hold the switch, it has simply forgotten where its automatic stops are.
How It Works on This Model
Each door on the 8Y A3 has its own window-lift controller that remembers the exact fully-up and fully-down positions of its glass. Those learned limits are what let a single tap run the window all the way and stop cleanly at the seal, and they drive the anti-trap (anti-pinch) feature that reverses the glass if it meets resistance rising. When the 12 volt supply is cut — a flat battery, a disconnect for other work, or a pulled fuse — that stored range is wiped. The window then only moves while you hold the switch, with auto-up/down disabled until you teach the limits again.
First, a Few Checks
- Sit inside with the door closed so the glass seats fully against the seal at the top.
- Switch the ignition on so the controller has live power while it records the limits.
- Keep fingers and loose items clear of the glass — anti-trap is inactive during the relearn.
- Use that door’s own switch, one window at a time, not the driver master panel.
- Make sure the battery is healthy; low voltage part-way through can abort the learn.
How to Re-initialise a Window
- Sit in the car with the door closed and the ignition on.
- Pull the switch up to fully close the window and keep holding for about 2–3 seconds after it stops.
- Release, then push the switch down to fully open and hold a moment at the bottom.
- Pull up again to fully close and hold for a couple of seconds at the top.
- Release and test one-touch up and down — it should now run on its own.
Repeat for each affected window using its own switch.
If One-Touch Still Doesn’t Work
- Hold a little longer at the fully-closed stop — the controller needs a couple of seconds there to register the top limit.
- Keep the switch held past the bottom too; releasing early on either end aborts the learn.
- Make sure the door is shut so the glass seats fully; an open door lets it stop short of the seal.
- Run the sequence again once or twice; the relearn only sticks if the glass reaches both true end-stops in a clean pass.
- Check the battery is healthy during the learn; after a reconnect a low charge can make the controller lose the limits again on the next sleep.
- Check the door fuse if a window is completely dead rather than just non-auto.
- A faulty regulator or switch can block the learn — any stored fault can be looked up on autodtcs.com.
Once It’s Done
Once the controller has relearned the positions, a single tap up or down should run the window the whole way and stop cleanly at the seal, and the glass should back off if it meets an obstruction near the top. Nothing shows on the dash for this — the only confirmation is that auto operation has returned. The setting is stored and holds until the battery is next disconnected or goes flat.
Frequently Asked Questions
Why did my A3 windows stop going up automatically?
A battery disconnect or flat battery wiped the learned position, so the controller dropped back to hold-to-move mode for safety. The motor and switch are fine — re-initialising teaches the limits again and restores one-touch and anti-trap.
How do I reset the auto window on an Audi A3?
With the door shut and ignition on, hold the switch up to fully close and keep holding for 2–3 seconds; then, if needed, fully open and fully close again, holding at the top. That single pass re-teaches the limits on that window.
Do I have to do every window?
Only the ones with one-touch that lost auto operation. A power cut usually affects them all, but you re-teach each window from its own switch, so do whichever no longer run on a single tap and leave the rest.
Do I need a tool?
No. It is done entirely from the window switches inside the car. No scan tool or dealer visit is needed for the basic one-touch relearn, which takes seconds per door once you know the routine.
Does the sunroof need the same relearn?
If your A3 has a panoramic or tilt roof, it can lose its auto positions after a battery disconnect as well, but it uses its own separate relearn from the roof switch rather than the window sequence above. This guide covers the door windows only.
Will this happen again?
Only if the battery is disconnected again or goes flat. With a healthy battery the learned limits stay put indefinitely. Windows that keep dropping out of auto on their own usually point to a weak battery or a wiring fault rather than the relearn.
This is the step most owners miss after battery work — see our A3 battery guide. For warning lights, look up the code on autodtcs.com.
Independent guide — not affiliated with Audi. Always follow your official service manual and safety precautions. Read our full disclaimer.