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Congratulations to BMW for making a key that’s almost impossible to replace the battery 👏👏👏

I just went through this and can say it works just fine. I did have a couple of snags though that i want to share with viewers. 1- Yes, the replacement battery had longer leads which I cut short but still the battery was not perfectly flush on the board like the original and hence the two halves of the shell did not come together perfectly. For that, you can use the blade to shave off the three little prong-like pieces in the cover where the battery sits and that will take care of it. 2- The lock/unlock function worked right away as I tested it before gluing the two halves back together however the fob would not click into the slot in the dash or operate the ignition. It's nothing to do with the shell. The reason was, which is what I want to highlight here, that the one chip on the board (top of the battery side) was not connected on the one end. The solder broke. Took me some time to finally figure it out. Once I welded it back all was good. Notes: you don't need much Super glue so don't apply directly from bottle but rather use a small screw driver to apply to the edges of the shell of the fob. When the fob didn't work in the slot I thought I ruined it so I bought a shell from Amazon. That didn't work either till I fixed the loose chip. Apart from not having the BMW logo that Amazon shell looks great and is very good quality. If you are careful splitting the OEM fob and gluing it back you should be just fine.

I pried the battery out without soldering and it off and it has worked fine now for 5 years!!!

Followed your instructions, never soldered before and the key works again with no issues. Thank you!

Instructions here worked out great for me. I have no experience soldering, and replaced the batteries on both my key fobs. I recommend getting a new case instead of reusing the old one.

Thank you very much mate 🙏🏼 Just managed to do mine today! The battery went kaput after 18 yrs of use of the Car ( it was a spare battery, seldom used). Test driven the car w the new key, OK 👌🏼 To Cut it out is especially difficult, its hard plastic, need sharp cutters, careful w fingers ! The L cover of the antenna, a small piece fell off. I seldom solder, so this is a rare skill for me, and I dont have the sucking pump, so its dangerous in case the solder melts into other nearby circuits. I bought the battery online ( cheap, RM30/-) BUT it had different legs, not the winding G ones but straight down, but Winged, so it wont fully fit into the hole ! So i need to shave some plastics inside, otherwise the cover wont close tight fit. Lastly, i would glue back the two parts using 2 part epoxy and the L piece back. All the time I was Cursing, Who was the Bloody Stupid BMW Engineer who made our lives Miserable by owning the car. Why did they make the key Fob Sealed ? Bloody Idiots. I have several other cars, they always have openable part to replace the battery.

why is BMW that stupid on design their remote key....

I sat down with my new DIY soldering iron and followed this guide, spot on, thank you so much! 🙌

This is insane, I can’t just drop a new battery in

Thanks. I was a little apprehensive about cutting with a blade but I worked it gently and slowly and eventually it came apart and the battery is now off. Greatly appreciated.

Nice clear video for replacing the battery on my 2011 328i. Thanks. The legs on the replacement battery were a bit long, just snipped them off after finished sodering.

The Non-Comfort fob battery recharges when in use. If your spare fob battery died, it might just need a 3 hour recharge.

Followed instructions on 2009 325i saloon thank you worked a treat.... really appreciate the video!

You just saved me over $300. Thank you!!!

Thanks for this video; it's very helpful. ...and this is why the last new car I bought was NOT a BMW. It's a whole new level of aholeyness to require solder for a battery replacement. (I just replaced the battery on my 2020 acura. It took 3 minutes. It's a $1 battery.)

cool to this point, it would have been complete with showing that it starts your car and also explain if the battery already has a charge or do you have to leave it in the car for initial charging.

After battery replacement the close button isn't working anymore. Any suggestions?

Making the key like this should be illegal

Damn! I got weld in order to replace my battery ?! lol

You have missed the hard part showing how practically it can split.

Sweet I have comfort access & didn’t even know it!

Was the remote control still working properly after replacing the battery? There were no problems with starting the car or opening the door from the remote control? I heard that when replacing the battery in the BMW remote control, you should provide an external power supply so as not to decode and unprogram the remote.

After changing the soldered battery, do you need to initialize/program the key for it to work or does it work right away without any other effort?

Thank you for showing the replacement method, but it is really not a convenient key that BMO has made

I just bought new battery and case. Cheap enough to just dump the old housing.

Can you add the link from where you bought the battery?

hi mate...how to indentify what is Comfort access or non Comfort access and Battery series number for my car? my car was e90 320d 2011..?

Wow a lot of work 4 me thank you

Hey BMW, I have a crazy idea: use a normal battery!

Will this fix if the key doesn’t start the car?

Great video! Did you use any type of soldering paste or flux?

hey, would this work for a 2010 1 series? thankyou

Do we have reprogram the key after the new battery is mount ?

Why bmw make this so complicated?

Wtf. Grrrrr bmw

After replacing the battery will I need to reprogram the key?

You should have add a video clip showing people it is working with the new battery you replaced.

could you replace only the battery if you wanted? Why do you need to change a rechargable battery?

Also can i get a comfort key fob and work with a car that didnt have a comfort key fob.

After changing the battery I am no longer able to lock and unlock my BMW 1 series using the key fob. Car starts however if I place the fob into the dash. Any idea what to do?

it worked your a miracle worker

Thx so much m8 for help! Cheers from Poland 🇵🇱 🍻

I did this but my unlock button no longer works, locks and trunk opens just just fine. I must have gotten some solder where I shouldn’t have or something :/

Thanks. Very helpful!!!!

Súper helpful video. Thank you!

So bmw starts sometime but not always but once it's started I can start agian over and over for awhile but if I don't start it agian for while it won't start. With the battier in the key fob not alow the car to start then? So if I change the battier the car will start everytime them?

The biggest bullcrap invention ever to take your car for service and even to replace on from dealer they want over $250 here in Canada. And it's not a normal battery replacement. My mom towed her car for this crap too.

Will the key fob need to be reprogrammed? It’s the key fob I’ve always used on the car.

A component has gone bad for me. Can someone tell me which component is between the battery and the transponder? Just above the quartz, in the middle of the board. Just need to know what it says.

Thanks for this. I managed to change the battery for my E92. I found the 'legs' of the new battery slightly too long to fit inside the battery compartment. This resulted in the fit being bad. So, I've got to unsolder it, somehow trim the legs and re--attach. Hope this helps someone.

is solder wick ok to use for desoldering?

Thanks for sharing, much appreciated 🙏🏾

The key lock button does not work. lock and trunk release buttons work

Thank you very much my friend can u share that soldering kit you have please so i can get one

my key randomly stopped working, it doesn’t unlock anything, even putting it in the car no lights will come on, but the car itself, the hazards will come on n the separate key to put in the door works, and the buttons inside the car. so i opened the key and the circuit board smells burnt and actually is browning… my trunk button is sunken in and brown at the back. i didn’t drop it so idek what’s happening

Could I mess something up by doing this

What temp did you have the tool set?

No bull👏🏾👏🏾

Merci !! Very good Stuff!! Je m'abonne !

Doit on reprogrammé après le changement de pile

Man thanks ! ♥

I tried this but fob still didn't work ?!?!

dude, where is your mic at? i hear only bubu-bububu, but thanks, all i need is to see how to open that thing

can you update your link so i can make sure i buy the correct battery please

thanks a lot

Is this the most BMW thing ever? It could have had an easy access tab, and heaven forbid a removable common battery like a CR2025. But no, BMW.

Excellent

Does CR 2025 fit in.?

BMW in Australia quoted $488.00 for a replacement key...............................wow

Excellent!

Your key may need dash configuration as mine does now after the battery change.

Hi there, can anyone recommend where I can get this done in UK? I'm trying everywhere and I'm not confident enough to do this

I did this and now my car won’t start it’s a bmw 328i 07 if anyone knows how to reprogram it please lmk !

Do you have to solder? Could you not just put it in the points and leave it?

What is the point of all this complexity?!!!!!!!🤖😖

Good video

What battery is in the fob?

I cleaned the key glue with some alcohol

Hi I did all this but the keyfob still does not unlock or lock my vehicle. Its a 2008 bmw x5. Any help? Any specific fuse I should check? Maybe the battery isn’t getting any charge. Any help is appreciated.

Does it lose the coding?

STUPID BMW DESIGN....WHY CANT THEY JUST MAKE ( ALL COMFORT ) KEY FOBS...THIS NON COMFORT IS TOO PAINSTAKING...TOO MUCH WORK....

Does the key have to be reprogramed after changing

What the number ofvthe battery?

on 2011 328i - will you get a warning to replace these batteries.? I don't problem when too close the car, but doesn't work from far., could this battery or something else.? What is an acceptable range for 2011 328i for key fob to work from ..? 12-15 fts or about 25 fts and more.?

I have a 2010 750li xdrive bmw and need to replace the battery in my key fob

How to close again?i need to buy super glue?

Also, how do I change the language on my 2006 325i? Please help!

How does it get charged? Would it be the charging mechanism not working? If so, a new fob will soon die. When a key has been sitting for too long, it will get discharged. Would recharging usually save it or battery would no longer be rechargeable like a 12V car battery? Yes, stupid BMW design yet programming these CAS key is not easy (special equipment) even the key itself on ebay is cheap (and battery replaceable.)

Mine didn’t wokr

Ingegneri Progettisti veramente intelligenti 😂😂😂

BMW always looking for an angle to make more money. This time deliberately making it near impossible to replace a battery unless you pay them to do. I have owned 4 BMWs. The story is always the same. Incredibly expensive parts and typically poor assembly especially the 3 series. Never again will I buy a BMW. Best to stick with Japanese made cars. Reasonably priced. Well built and very reliable.

Gotta do all this shit juz to replacement the battery 😡😡

Is for BMW buy another key everytime runs battery out, so no one going to do this procedure, at least not me.

Why would they even make a non comfort accesss wtf is wrong with engineers bmw talking bout it’s gonna take 2 days for the remote to come in I need my car now

If the battery is bad, will it show up on my instrument cluster that it needs replacement?

bought the battery did not work and it looks completely different to the one you are replacing with on the video

Stupid design , they should make all Comfort access even for recharge ones if battery goes wrong. Thx

What bloody shambles of a key fob.

Did everything you did.. key not working ?