Marc Favreau

Why Are My Windows Open?

If you’ve ever walked out to your car and found all the windows open, this is our subject.  We’re going to discuss a feature found in cars from a number of manufacturers that catches people with their pants down. Or their windows down. This is not about a fault or a system failure or a warning light, but about something working exactly as it is supposed to, but doing it seemingly at random on its own.

Vehicles made by BMW and Mini, Honda and Acura, Ford and Lincoln, Maserati, Mercedes, Toyota and Lexus and Volkswagen Group, include what is called a convenience feature, which opens all the windows for ventilation when the unlock button is pressed and held. The sunroof will be open as well and the car unlocked.

From what we’ve discovered only Mercedes and some vehicles made by the Volkswagen Group offers the option to close everything again using the lock button. The Honda we have here does not.

Its An Accident!

So, what is causing the surprise window openings can be explained by accidental button pushes. Whether carried in a bag or in a pocket, something pressing on the unlock button for an extended period can and will activate the feature, if the key fob is within 50 feet or so. Remember that while the key fob’s keyless access can only operate within 18 to 24 inches of the vehicle, the buttons on the fob will work from a much greater distance.

For a fob carried in a pocket, preventing this may be a simple as turning the fob over on the key ring. The buttons will face the other way, if like me, your keys rest in the pocket the same way each time.

If it is carried in a bag, the nature of keyless open and start can easily lead to the fob migrating to the bottom of the bag. In this case, you might try using a device like this carabiner or snap hook. It can be hooked to a strap like on this computer bag and still actually be closed into the bag. But it won’t work its way to the bottom. The devices come in many different sizes and colors so you can be a stylish as you’d like and they can be found online or at most hardware stores.

To finish off the functions of the actual convenience feature, the windows will stop short if the button is released, and will continue down if it is pressed and held yet again. Some vehicles require the unlock button to be pressed and released once before the convenience feature will work. In Honda and Acura vehicles, the feature will work by holding the mechanical key turned to the right in the key cylinder, but this will not happen accidently. Also, turning and holding the key back to the left will close the windows and sunroof.

The feature can be disabled in Ford Motor Co and Toyota and Lexus vehicles, but you’ll need your dealer. In fact, the feature in a Toyota and Lexus must have first been activated in this way.

So, if ever you find your windows wide open one day, don’t panic — find a new way to carry your key fob.

Remember that only proper service and repair procedures will ensure the safe and reliable operation of your car. In addition, proper safety procedures and precautions, such as the  use of safety goggles, the right tools and the equipment should be followed at all times to eliminate the possibility of personal injury or improper service which could damage the vehicle or compromise its safety.

These posts are for information sharing purposes only, and should not be used in lieu of an OEM service manual or factory authorized service procedure. We are not in the auto repair business nor do we publish automotive service manuals. Nothing we include on these pages and posts has been reviewed, approved or authorized by any vehicle manufacturer.

Technology is always changing and what is current and accurate today may be literally out-of-date and inaccurate tomorrow. And when it comes to the current state of flux in the auto industry, nothing is more true.