Comfort & Convenience Codings

Beyond the headline mods, BimmerCode is full of small quality-of-life tweaks that quietly make the car nicer to live with — one-touch and remote windows, comfort turn signals, auto-lock, mirror dip on reverse, welcome lighting and more. Most live in one control unit, so you can knock several out in a single sitting. Here's the rundown and how to do them.

3GBy the 3 Series Guy team·Updated May 2026·8 min read

Mostly one control unit

Windows, lighting, mirrors and locking all sit in the Front Electronic Module — described in the app as "Auto Start Stop function, doors/windows, lighting, mirrors" (named Body Domain Controller on some chassis). A couple of comfort items live elsewhere, which we note. New to this? Confirm your car's supported, get a supported adapter, and read the safe routine.

The Comfort Codings Worth Doing

Each with the control unit it lives in.

Remote Windows (Comfort Open/Close) Front Electronic Module

Hold the key fob to open (and close) the windows — superb for venting a hot cabin before you climb in. On some cars the sunroof joins in too.

One-Touch Windows (All) Front Electronic Module

Enable one-touch up/down on every window, not just the driver's — a small luxury you'll use every day.

Comfort Turn Signals (Blink Count) Front Electronic Module

Change how many times the indicators flash on a light tap — set it from the default three to five, or to one, to suit how you drive.

Auto-Lock / Auto-Unlock Front Electronic Module

Lock the doors automatically as you drive off and unlock on park or shut-off — set-and-forget security and convenience.

Mirror Dip on Reverse Front Electronic Module

Tilt the passenger (or both) mirror down when you select reverse to see the kerb, then return to normal. Brilliant for protecting wheels when parking.

Welcome / Follow-Me-Home Lighting Front Electronic Module

Tweak the welcome lights and how long the headlights stay on to light your path after locking. Mostly cosmetic — mind local rules on any exterior lighting change.

Ambient / Interior Lighting Front Electronic Module

Adjust interior ambient and footwell lighting behaviour and brightness where the car supports it — a subtle cabin upgrade.

Climate / Auto-Fan Memory Air Conditioning

On some cars, remember climate or auto-fan preferences across drives instead of resetting. This one lives in the Air Conditioning control unit, not the body module.

How It's Done

The routine is the same for each — change one, test, repeat.

Connect & Pick Standard Mode

Adapter in, stable voltage (engine running or charger on), tap Connect, select your vehicle and choose Standard mode. You'll land on the Control units list.

Open the Right Control Unit

For windows, lighting, mirrors and locking, open the Front Electronic Module (the one whose description mentions doors/windows, lighting, mirrors). For climate memory, open Air Conditioning instead.

Pick One Setting & Note the Original

Choose a single comfort option, record its current value (screenshot or note), then make the change. This note is your undo — never skip it.

Code, Test, Then Next

Tap the code/checkmark (write) button, then test that one change before moving to the next. Working through them one at a time means you always know what did what.

Tip Because most of these share the Front Electronic Module, it's efficient to do them in one session — but still one change + test at a time. While you're in there, the same unit holds folding mirrors on lock and start-stop off by default, so it's a good time to knock those out too.

Reverting Any of Them

Each is independent.

To undo any single coding, reopen its control unit, set the value back to the original you recorded, and code it. Each returns to stock on its own — which is exactly why you note each original before changing it. See reverting to factory coding on the hub.

FAQ

Are these all in the same place?

Mostly — windows, one-touch, comfort turn signals, auto-lock, mirror dip and lighting all live in the Front Electronic Module (the body controller). Climate/auto-fan memory is the exception, in the Air Conditioning unit. Go by each control unit's description.

Can I do several in one session?

Yes, and it's efficient since they share a control unit — but change and test one at a time. If you batch many changes and something behaves oddly, you won't know which caused it. One-at-a-time is slower but far easier to troubleshoot and revert.

Will remote windows or one-touch drain the battery?

No meaningful effect — the window motors draw briefly, as they do normally. If the car sits for long periods, keep the 12V healthy with a maintainer regardless.

Do any have legal implications?

The comfort items here are personalisation with no legal issue. The one to watch is exterior lighting behaviour (welcome/follow-me-home) — changes to road lighting can be regulated where you live, so check local rules before altering anything that affects lights used on the road.

Are they reversible?

Yes — every one is a single, reversible setting. Restore the original value you recorded and code it. Follow the usual care: stable voltage, supported adapter, one change at a time, originals noted.

The Bottom Line

These small codings are where a BMW starts to feel tailored to you — remote and one-touch windows, comfort turn signals, auto-lock, mirror dip, ambient lighting. Most live in the Front Electronic Module, so you can do a batch in one sitting — just one change and test at a time, noting each original. Pair them with folding mirrors and start-stop off from the same unit, and see the full set on the BimmerCode hub.