BMW Battery Replacement - How to Do it Yourself

If your BMW key fob isn't responding to the lock and unlock buttons or has stopped working completely it may need an upgrade to the battery. It's easy to replace the battery yourself.

It is enough to find the access port that is hidden within the valet key, take it out, it, and switch out the battery with a fresh one. Then, you must make sure to register the new battery.

how to open a bmw key fob to replace the battery

A car battery is the most important element of a car and will have to be replaced at least a few times during the life of a driver. However, replacing the BMW battery doesn't have to be the most difficult DIY task, and you could even save some money by performing it yourself. Knowing how much work required to replace batteries is essential to success with your DIY project.

The first step is to determine the type of battery your BMW makes use of. There are three kinds of batteries, each of which has its own pros and cons used. Lead-acid batteries are the most well-known because they contain sulfuric and lead. It generates electricity by a chemical reaction, and it recharges itself whenever you use your BMW. Other battery types used in BMWs are Gel or Absorbent Glass Mat (AGM). These batteries perform the same way however they require a different installation and handling.

It's time to replace your old battery when you know which one your BMW makes use of. Most auto parts stores will have a system that matches the Bmw key Fob functions model and make with the correct battery. This will save you time. You can also try looking at the owner's manual, which will likely contain the battery type required for your specific model.

To replace the battery on a bmw spare keys keyfob, turn your vehicle off and take the blade made of metal from the valet key. You can also employ a flat screwdriver, or valet keys to gain access to the lock-cylinder. Remove the liner from the fob and locate the battery. After taking the batteries out, clean the terminal connectors then carefully reinstall. Don't tighten brackets too much, since this can crack the battery case. Connect the positive terminal before the negative terminal. Finally, connect the upholstery to its original place.

It's recommended to register your new battery. This will let the engine control module, also referred to as the DME and the DME know that you have a new battery and it won't be confused with which one to charge. This will also reset the battery's age statistics to avoid charging too much for your brand new BMW battery.

How to Replace the CR2032 Battery

A lost key fob can be an inconvenience, but it's also pretty easy to replace the battery. It takes only about a minute and can be done at home.

BMW key fobs use CR2032 watches batteries. They are more expensive than others, but they are available at any convenience store or auto parts store. When you've purchased an entttery on the front of the fob. Remove the cover with a flat-headed screwdriver, revealing the battery. Replace the battery with the positive side facing upwards, and then reassemble your key fob.

Once the new battery is installed After the battery is installed, test the key fob to confirm that it continues to operate in a proper manner. If the key fob does not respond, contact your BMW dealer for further troubleshooting assistance. Some older BMW models require that the key fob be re-synchronized with the vehicle after replacing the battery. However, this is not the case for BMWs made in recent years.

Although it is possible to swap the battery on an older BMW key fob by cutting open the case and putting into a new battery this procedure is not recommended as it could cause damage to the internal circuit board. Tulley BMW Nashua recommends that you follow the instructions in this guide to changing the CR2450 batteries on most BMW keyfobs. This simple task can take only a few minutes and will get you back on the road.

How to Replace a CR2032 Side Indent Battery

It is simple to replace the CR2032 side-indent batteries found in bmw fob key replacement series 1 keyfobs (and other models). This battery looks like a penny and is easy to insert into the slot. Replace the old battery with the new one by using your fingers. Be sure to make sure that the polarity matches. You can also find replacement batteries at numerous auto parts stores and online.

If your BMW has an engraved key fob it is a bit more difficult. You cannot replace the CR2016 battery because it is different from a CR2032, CR2025 or a CR2032. However you can try shimming a CR2016 cell with some conductive foil to see if it will work. If it fails to work, you'll need to cut off the fob plastic piece to expose the battery and then solder in a new one.

The small access port on most BMW key fobs can be opened using the edge of a different key's metal blade or a flat-headed screwdriver. If you don't have a metal blade you can try using the tip of a pencil. Once you have removed the cover, you can see the CR2032 battery inside.

The CR2032 side-indent battery is not intended to be serviced, and the case is not opened. This battery is rechargeable and bmw key fob functions charges when the key is inserted in the ignition.

It is essential to have a backup key in case you accidentally break your fob or lose it somewhere. Contact us at Tulley BMW Nashua if you require assistance programming your BMW remote, or replacing a dead phone. We have a dedicated team of experts who are available to address your questions or concerns. We look forward hearing from you!