How to Start a BMW or Mini with a Dead Key Fob
Starting Your BMW or Mini
- But first, if you are still locked out, click here for help getting inside!
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- Finally, if you need another manufacturer, click here.
Some BMW and Mini models already require that the key fob be inserted into the dashboard next to the Start/Stop button. If the key fob battery is dead, the vehicle will recognize the fob when inserted. In “Comfort Access” models, the slot is only needed if the fob’s battery dies, or if electrical interference interrupts the fob’s signal. Insert the fob into the slot and use the Start/Stop button as normal.
For other BMW or Mini models, hold the remote control against the marked area on the steering column and press the Start/Stop button within 10 seconds while depressing the brake.
The process remains the same in the new EV line from BMW, starting with the i4 and iX. However, there are now two additional back up start methods available in these vehicles.
The smart phone recharge pads also act as new start points. A properly connected key card or a smart phone holding the proper BMW app touched to the pads will allow the car to start. The pad is found in front of the cup holders in the i4 (first image) and on the lower level of the iX console (second image).
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text 
message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
Video Help with Your BMW or Mini
There are lots of videos here to help out.
Recharging the Display Key
In an automotive first, BMW‘s Display Key (right) actually has a rechargeable battery. The display is automatically disabled when the charge is low, which is a major hint that the device needs to be recharged!
The car features a wireless cell phone charging station inside the center console. There is also a bulge into which the Display Key can be slipped, with the lock button up and out. The Key is charged with a micro USB cable, a micro USB port on the Key (see the arrow on the Display Key) and the USB port at the back of the console.
Related: Getting Out!
… Return to Part I, Getting In
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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.
The author has 25 years of automotive experience and has assembled the most extensive collection of symbols and warning lights anywhere (over 1,000!) and can help you open and start any keyless start car with a dead key fob battery. BA, St. Joseph’s College, ME: MS, Rensselaer Polytechnic Institute, NY
The CX5 was the first model to use Method 3 and by 2016 all Mazda models use this method. Push the brake pedal, or the clutch pedal if you have a manual transmission. This will cause the indicator light in the Start / Stop button to flash green. While it flashes, touch the back side of the key fob to the Start / Stop button, which will cause the green indicator light to stop flashing and remain lit. Push the Start / Stop button to start the engine as normal – or with the fob itself.
Method 2 is found in the CX7, CX9, MX-5 and RX8 models. Remove the Start knob cover by pushing both release buttons and pulling the cover off exposing the key cylinder. Slide the auxiliary key out from the bottom of the advanced key (see above) and insert it into the cylinder. Turn the key to start the engine.
For Method 1, found in the Mazda3 (including MazdaSpeed3) and Mazda6 prior to 2014, slide the auxiliary key out from the bottom of the advanced key (see above). Use the auxiliary key to remove the key slot cover located on the right side of the steering column. Depress the clutch (manual) or brake pedal (automatic) until the ring around the key slot starts flashing. Insert the auxiliary key into the slot while it is flashing, but do not turn the auxiliary key in the slot. Press the push button start to start the engine.
Note: If you have made an attempt to start the vehicle without success, there may be residual pressure in the brake system and a new warning light may appear (left) or text message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
Here’s the deal: Buckle up, find your model, and if the main start battery is still good, we’ll get you underway.
With Style 1 (square) key fob, used in most GM vehicles prior to 2014, and in some Cadillac CTS Coupes and Sedans ongoing, place the transmitter in the transmitter pocket at the top and rear of the center console storage area with the buttons facing towards the front of the vehicle (right).
The XLR Coupe use either a small key fob that does not hold a mechanical key or the Style 1 fob. Regardless of the key fob type, the pocket for the transmitter (or fob) is on the left of the inside of the glove box. Place the transmitter in the pocket with the buttons facing the glove box storage area (right).
In the Cadillac SRX, the transmitter pocket is located at the bottom of the console storage area (right). The new CT5 crossover uses this location as well, but using the Style 3 key fob. The spot may be beneath a storage tray, which must be lifted out, or at least beneath all the stuff that has gathered inside. Then insert the transmitter with the buttons facing up and with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
The new key style, Style 3, was introduced in 2014. In the ELR Coupe and some CTS Sedans and Wagons (later models all use this location), locate the transmitter pocket on the shelf in the front of the console, as shown to the right. It is beneath a rubber that will need to be removed, and is the shape of the transmitter. Place the transmitter in the pocket, buttons facing up, and with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
In the XTS sedan, the transmitter pocket is found in the front of the center console storage area. A storage tray may have to be lifted out. Place the transmitter in the pocket with the key ring up and the buttons facing out. See the image below. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. Check out the video 
In ATS sedan, the transmitter pocket is located in the face of the front of the inside of the center console, similar to or as shown to the right. Slide the transmitter into the pocket with the key ring facing out and buttons up. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
In the CT6 sedan, the transmitter pocket is located in the center console as well, but in the face of the back of the console, as shown to the right. Slide the transmitter into the pocket with the key ring up and buttons facing the front of the car. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal.
previously in a Cadillac model. And the Escalade went along for the ride.
Meanwhile, the new CT4, CT5 and Lyriq EV models, for no apparently good reason, use the rear cup holder as the back up start location. Again, make sure the cup holder is empty and that the key fob’s buttons are facing up. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal to start the vehicle.
In the XT5 and XT6 SUVs, clear away anything being stored in the center console. At the bottom near the back, there is a depression shaped like the Cadillac key fob. Set the fob down in the depression with the buttons facing up. With the vehicle in Park or Neutral, step on the brake pedal and press the Start / Stop ignition button as normal.
pocket also located in the face of the front of the inside of the center console. However, the pocket points down, as shown to the right. The pocket in the Escalade is placed to the center and a bit lower. Slide the transmitter into the pocket with the key ring facing out, buttons forward (in a Suburban we had on hand, the engine started with the buttons facing either way). It is a loose fit, so don’t be concerned. With the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. Check out the video 
message to Step on the Brake. Press the brake pedal very, very hard when trying to start the vehicle again to be sure that the release switch behind the pedal is engaged. Or wait a few minutes and try again.
fob (remote control or ‘clicker’) styles, and two (GM Styles 1 and 3) have mechanical keys embedded inside. That key will be used to unlock the driver’s door or the trunk (yes, the trunk) and in some cases to remove a piece of the car!
The Style 3 key fob is similar to Style 1, in that the mechanical key is removed from the fob for use getting into the vehicle. To remove the mechanical key, press the button on the side of the transmitter near the key ring, as shown, and pull out the key.
Many GM models hide the key holes under a cap at the back of the driver’s door. They include the Cadillac CT4, CT6, CTS, XT4, XT5, XT6, XTS and ATS. 
key hole. The cylinder is hidden in the same place and manner, but the cap is the top, 1/8 of an inch portion. To remove it, the door handle must be pulled fully open. Then, push the cap towards the handle to release it. It may take a bit of force to accomplish this. See two videos 
Then in 2020, Cadillac came up with a whole new cap. As with the first style, there is a slot beneath the cap (right). The handle is first identified by its more curved appearance front to back and a separation near the top. Only the bottom can be removed. It is found on the Escalade and CT5.
cover frees. It will pop out about 1/8 of an inch. Remove the key – do not pry or pull with it. Once free, the cap simply swings up and can be pulled away (right).
The CTS, XLR and ELR Coupes have flush door handles (left image) with no key holes
at all. They have a very different trick up their sleeves.
We have two videos for coupes 
Keyless or push button start GMC models use the third of three GM key styles. A mechanical key is held inside the fob and is needed to get into the vehicle.
With the flip key key fob, the mechanical key remains attached to the fob, but several back-up locations are used. In the Buick Verano, Regal (through 2017) and pre-2014 Lacrosse, remove the cup holder from the center console in front of the storage area. This may be the entire cup holder assembly (above right), or simply a cup holder insert (below right).
Look for a notch at the top rear of the cup holders to insert a finger or tool to aide removal. Then place the transmitter in the transmitter pocket with the buttons facing up. The pocket will be shaped somewhat like the key fob.
The back up location is changed in the Regal beginning with the 2018 model year, and the car uses a newer key fob. The spot is in a narrow compartment at the front of the center console, as can be seen in the image at right. And for the first time in any GM vehicle, the spot is marked. There is an image of a padlock with lines radiating from it, meant to invoke radio waves.
For the LaCrosse in 2014, the transmitter pocket is moved into the storage area inside the armrest near the auxiliary power, USB and audio ports (right). Place the transmitter in the pocket.
The newest key style was introduced in 2014. It features a removable key. Note that there are still some flip keys in use. The Buick Encore, with exception, and Envision, until 2021, crossovers will use this spot. Simply drop the key fob into the front cup holder with the buttons up, and start the car as normal. Check out videos for these models 
The exception is the Encore GX, beginning with the 2020 model. There is a small depression at the rear of a tray on the center console that is just in front of the center console storage area. This is the back up spot. The new Envista model introduced in 2024 uses this spot as well. Drop the key fob onto this spot with the buttons up and start the car as normal, again pressing the Start / Stop button while stepping on the brake.
And the 2021 Envision finds the back up spot moved to the front of the center console storage area, See the image to the right. Inside and at the front of the console there is a small, flat depression. Drop the key fob onto this spot with the buttons facing up and start the vehicle as normal, stepping on the brake while pushing the Start / Stop button. See a helpful 
Finally, the Buick Enclave gets keyless start for the first time in 2018. The back up spot is beneath the rubber mat at the bottom of the center console. Remove the mat and place the transmitter on the fob-shaped depression that is now visible. As always, with the vehicle in Park or Neutral, press the brake pedal and the Start / Stop ignition button as normal. We’ll post more information as it comes available.
Buick uses the last two of GM’s three key fob (remote control or ‘clicker’) styles. Style 2 is a flip key, shown to the right. Simply press the unmarked chrome button to extend the mechanical key. It remains attached to the key fob.
Then came the new Envista in 2024. The key hole or lock cylinder is hiding behind an oval cap seen towards the rear of the driver’s door handle (right). It will need to be removed to expose the cylinder.
the oval cap that can accept the key (right). Insert the key into the spot and press the key inward. This will allow the cap to move. Move it towards the rear and remove it. The key hole is now visible and the door can be unlocked.