DIY- BMW e46 key fob battery remove/replace

This is how I fixed my key after it wasnt working well lately, it would work only few times and after i went to the dealer they told me I had to buy a new key for 230$...i said...HELL NO! so i found my way around and hopefully i can help you guys save some money too. good luck, be smart, be safe and... BE POLITE WHEN POSTING COMMENTS...thanks

[@tsmgguy]

Before replacing the battery, try reprogramming the key. Hold the key next to the ignition slot without inserting it. Press and hold the top unlock button, the button nearest the key flat. Continue holding it, and press the center unlock button three times. If you key reprograms, you'll know it immediately.

[@SailingSeabbatical]

Wow, you’re amazing for sharing that, thanks!

[@EvolvedTCGLive]

What if it only has two buttons.

[@noahfloyd4522]

Thanks!!

[@maxwarre]

Even after 9 years, this video is still helping people out. Just fixed mine. Thnx for taking the effort to make the video man. Kind regards from Antwerp Belgium :-)

[@bemochop4356]

What you do when you switched the battery did you have to weld it back ?

[@maxwarre]

@@bemochop4356 i glued the 2 halves with superglue if that is what you mean

[@leeludlowart237]

@@maxwarre how does it look after ?

[@moihawk666]

my key was different so no thank you

[@maxwarre]

@@leeludlowart237 that all depends on your cutting, sanding and glueing skills :-)

[@noodleplex]

Just had to do this as selling car, thanks for posting the video, ignore the negative comments. Easy way to open key is using a new box cutter blade, tap gently with hammer all round seal. On opening, use a multimeter and check battery volts. Mine was 3v, perfect. Close inspection showed positive connection was broken to circuit board. Add a wire, solder, rebuild key. no need to reprogram. No problem.

[@milliondollarmindset9867]

Great fucking video sir. Don't Listen to these idiots saying Its Boring or its not straight to the point. Im here because something needs to be fixed. Not to have fun. Fixing something involves step by step proceedures. Thanks to you i don't have to go out and pay 250 for no punk ass key

[@Taff-Uk]

just done this, worked a treat, you can get the solder connection under the battery the same way as removing the top soldered connection, just take your time, to seal both cases back together I used superglue and a hairdryer, used the glue all around to make a water tight seal as well, and used a hair dryer to seal it pretty quick, worked excellent.

[@kevinespaillat9187]

Yeah the video is a little slow to get to the point but the guy is doing a favor to the BMW community. You guys that are talking junk should just go buy the $230 key and stop watching free "how to videos" acting as though you can't just fast forward.

[@CFITOMAHAWK2]

put it at 1.25 video speed-for the impatient punks..

[@zenas10]

Excellent video. I followed the instructions for a 2003 BMW X5. The fob would respond intermittently also requiring me to be closer and closer to the vehicle to unlock doors etc. I used a utility knife which took too long to get it open. I switched to a precision 1.4m/m screwdriver (eyeglass screwdriver sized) to scrape around the sides until the fob opened. You must be careful when prying welded metals arms off the top and bottom of the battery so that the arms do not pull away from the circuit board. The top and bottom of the battery "is" needlessly cradled in two arms. The correct battery is a Panasonic VL2020 3V rechargable coin sized lithium. I used a Maxell 2025 3V and did not solder the arms back (necessary). I closed it using neat strips of electrical tape. Looks Great & Works great!!!! Thanks

[@larayneolson3736]

This worked! The BMW key is supposed to get recharged in the ignition and does, but only to a point. Batteries wear out. My husband's key stopped working and would no longer take a charge (because he used it infrequently?). We tried this replacement and it works like it is new. Thanks!

[@brickceo]

If your circuit board is damaged when opening the case or removing the battery, you can order a blank (Uncut) replacement key ($25- $60 online) and just swap out the circuit boards. Worked like a charm. I ordered mine from NJ on Saturday night and had the new key in SoCal on Monday. Saved over $200

[@1987Problem]

Worked great for me. The new battery I ordered for £4.50 from eBay came with the battery clip installed so even easier. Just solder the new part onto the circuit board, close up key then reprogram using another KZbin video. Thanks very much you saved me £££

[@chinnosequeira]

i used a soldering gun and some soldering wire, before that i had never solder in my life, all i did was check some vids here in YT, the welds were far from perfect but they did the job. so what im trying to say is that u dont need skills to do it urself. good luck budy

[@camcov4324]

I tried it and so far it's worked great (still waiting for the UPS man to delivery me new battery tho). It does take quite some time to get the key opened, took me in excess of an hour. One warning though, when you try and dislodge the battery from the metal thingy, be extra careful: it sort of popped out as I did the top part and flew away across the room. So now I've gotta weld the bottom metal thingy back to the circuit (I also managed to cut myself in the process, so yeah, extra care is required, or just ask someone who's not clumsy for that bit). I'm hoping that'll work, if not I'll just buy a new £140 key (woopwoop). So yeah, overall it's been a great experience lol. (And yes, I don't know about other countries, but only BMW dealers will do you a new key in the UK. I've tried. Trust me. NOBODY else will do it).

[@domshaheen7356]

THANK YOU!!!!!!!! For my X3 no soldering required, just careful knife work and super glue to reseal. REALLY appreciate this video, it's saved me $$$$!!!

[@winlau90]

It totally worked... I became a professional E46 key fixer... Thanks a lot man this save me money. Now i am dancing dancing and more dancing. THANKS A LOT ONCE AGAIN...

[@dannycarlo3087]

Dude, im a volkswagen mechanic, have been for years, i work at a bmw/vw dealer, i just spent two hours doing this. went out and bought three different batteries, a 2016, 2022, and a 2032, i did this perfectly, no mistakes, very clean, it doesnt work. at all. not even close man.

[@Baked26]

Has to be a cr2025, or a vl2020 is the oem battery which will charge

[@chinnosequeira]

@razes071 hahaha...thanks for the comment and regardless u think im mentally obtuse, I respect ur opinion. The reason I stated every little detail is bc there is many pp who dont have that much "skills" or are not really a DIY person so i was trying to be very clear to anyone watching. U have a great day.

[@edhill9570]

Wow. We as humans can be really foolish. Thank you for the video sir. Saved me 246$ Even the guy at BMW didn't seem to know this because he was looking for screws. Great job my friend

[@florianteddyogolla915]

😂 BMW guy looking for screws 🤣

[@tsmgguy]

Thanks! Two remote keys were provided with my 2001 325i when I bought it new. One key ceased to function at about the 10 year mark. The other is working fine to this day. As I understand it, the battery in the key is charged when the key is in the car's ignition, which neatly explains how it's lasted for so long. The VL2020 is rechargeable, so it's the correct battery for this application.

[@tsmgguy]

I used an X-Acto razor saw to split the key case for a neater job. I found that the battery was fine, but that one of the battery micro welds had come loose. Bending the contact down so that it touched the battery restored full function. Neither the valet nor the wallet keys originally supplied with the car have RFID chips. They lack the remote functions but work fine for unlocking and starting the car. The valet key will not unlock the glove box or trunk.

[@batmanlivesinmybldg]

You should mention that you NEED a soldering iron to do this to weld the new battery to the old metal connectors. That info would've been very helpful.

[@vestraya]

He does, if you watched the video to 6:45

[@exposeevil5492]

Super glue will work. Just need contact

[@jorgemat8080]

Wow the guy gives a really clear and good explanation and still has complains . Just say thank you very much for showing us that these are rechargeable and not removable batteries.and you can save over 200. bless you for posting this up. 9 years later and still going I think people that negatively posted on this video are jealous now 🤣 🤣 🤣.

[@exposeevil5492]

@@jorgemat8080 Didn't work for me

[@jorgemat8080]

@@exposeevil5492 sorry it didn't work for you I replace then with normal batteries and an aftermarket shell and never had a problem.

[@SenseiTG]

Excellent DIY video. jay jay and others, with some experience with battery run devices (or just basic online research on batteries) you will find that rechargeable batteries do not last forever. Much like everything else they wear over time and loose their ability to take and hold a charge, as well as seeing changes to several other important properties, such as top charge voltage, esr (equivalent series resistance = ability to maintain voltage when under load). Danny Carlo, you cannot just go pick up a battery from your local shop. Even though it has the same form factor (size), it is likely not even rechargeable. The most common types you'll find are of a different underlying technology and also puts out a different voltage, preventing your device from working. As mentioned by others, check for obvious problems such as solder joints having failed before replacing.

[@A2o1o]

Before changing the rechargeable battery (usually lasts 15 years) try reprogramming your key by turning it 5 times in ignition lock to position 1, then remove, press&hold unlock button and press lock button 3 times. Worked like a charm form me:)))

[@josueher7518]

Wait so my key .sometimes it works now sometimes it doesn't.. should I try re programming it?

[@erikd804]

Looks easy but takes time.. that plastic around key fob is thick. The welds on the battery are on both sides so be prepared to fight that. But with a lil time and patience you can save yourself $200

[@Banditemcee123]

2022 and this video from ten years ago just saved me money....thanks!!

[@nickhorton785]

Thank you. I was having trouble getting the key to split open. Now I know it has to be cut open, thanks to BMW.

[@s0ulsister]

Chinnosequeira, dear! thank you SO MUCH for this vid! i did it all like you said, cut through the plastic, took the battery out - stuff which even my husband did not dare to try. and bingo! we finally found out, that the problem was a battery (after some disturbance, old battery worked to open a car!) we were not able to get a right rechargeable battery, but i'll keep looking, get one and have my key working! you saved me an enormous amount and made my day! XOXO!

[@mjayjock1]

Julio, great job. I really respect folks whose second language is English - especially since I have no second language. I learned a lot from you and from the comments. Specifically, take you time, get a Panasonic VL2020 online, take your time, have an electronic soldering iron using SuperGlue to seal it up. My keys are still working but I am ready now thanks to you.

[@markbhoward]

TIP, try to reprogram before assuming bad battery. A rep at the dealer tried to reprogram (or acted like he did) and it didn't work. I spent 4 years stewing over it. I ripped the battery out of one of the keys per this video, while awaiting a battery for the hell of it I tried reprogramming, and it worked! I don't know how a battery in a year 2000 car can work after 14 years, but it does!

[@mrsandpebble1]

bro! We did this and it totally worked. Fantastic work my friend. we're now going to do a dance in front of the BMW car yard. we saved big bucks! Great work.

[@eco_guardian]

Before you try this make sure your key hasn't fallen out of program. I had four keys and only one worked. I thought it was the battery but it turns out they just needed to be reprogrammed. The batteries last a long time - my car is 12 years old and all keys still work great.

[@AID771]

I've had 2 bmw e46 and with both the battery has died in the key. The cost of a new key was over £100. Absolute rip off. Thanks for the vid

[@freedommmc]

"im sorry if the quality of the video is not that good I'm recording on my iphone" LOL

[@grahampenman323]

Worked for me, key is messy when stuck back together but replacement battery purchased on Amazon worked perfectly. Many thanks

[@rrobinson001]

You my friend have saved me a lot of money. I did have to re-program the key. Took me about a hour to do it all but well worth the time and I saved $250.00 bucks. Thanks again.

[@stevejungdo]

Cheers. Grazie

[@jend8759]

Thanks for this. We have the same fob. You aren’t obtuse. You are being helpful!

[@michaelliebel1421]

Bro, you are the man. Mine is dead and now turning key in door isn't working. Just got battery out. Going to change and see what happens. Good looking out. Screw BMW and their $200+ keys.

[@salbarjr]

Definitely agree with you Mark, my 2002 540's key didn't work for a while, I reprogrammed it and it worked great for a year or so. Although lately some times it work and sometimes it does, I think I need a new battery finally..

[@roe20111]

Dude! Your a life saver!!! Thank you for saving us about $230! We all appreciate it. I did what you told on here and it worked perfect.Also my lock button feel off (middle button) and that was another reason it wasn't working probably. I have 2 questions: 1. How do I get the lock button welded on? If I took it to a lock smith will they welded on for me? Also, what kind of glue do you use to put the key fob back together? Once again thank you for helping us out!

[@fillemonsheya3932]

Hi, Julio.. greetings from a BMW lover all the way from Namibia. Well I just want to give my thoughts not am smarter, but just for info..actually the battery charges through what is called EMS, a magnetic field which is created by the coil as long as the key is in the barrel..it's the Tesla theory bra, if you induce a magnetic field in one coil, you can have a voltage in the other without any physical contact

[@abnnab1648]

How can one do that bro

[@andreasschulz6817]

The VL2020 from Panasonic is a rechargeable battery This should not be replaced by a normal lithium battery as CR2016 the CR2016 is not suitable for charging. When charging the battery acid produces gases may leak or even burst. The VL 2020 can be ordered at Amazon

[@CollieJenn]

Wow. That's important info! Thanks!

[@doloresdelano4656]

Complement, Make sure you order the Rechargable Panasonic MADE IN JAPAN. they do the best batteries

[@Cornelius-31]

Thank you Julio for sharing about the BMW key. But here is what I learned. The BMW Key should get recharged whenever you have it in the ignition when the car is running. My key wasnt recharging in my X5. which pointed to another problem with my starter. check this out..If you put the key in the ignition in the number two position and place a charger on your battery. U can recharge the key. It might take a few hours to fully charge..But if there is no damage to the key..IT will charge

[@neilrogersrogers6313]

With my experience on car keys, I am confident that any sealed key with a soldered battery onto a circuit board is a rechargeable one. Leave it in the ignition turned on and it should charge.

[@jco.fitness4277]

how long you think? ill it

[@neilrogersrogers6313]

@@jco.fitness4277 I have heard it may take 2 hours

[@chinnosequeira]

wow thank u so much for such a great comment! God bless u..!

[@joeygonzalez7388]

Why did u complement urself

[@JasonPoledouris]

Awesome!! Thank you so much for posting this! My wife's 330i key died and BMW wanted 300 bucks to replace it! A friend of mine told me you couldn't replace the battery cuz it would blow up or something when you tried to open it??? I am going to attempt this before her bday next month :)

[@y2khardtop]

this worked GREAT for me, got a battery for under $10. The connectors were different, but I was able to use one of the new battery tabs, and one of the fob tabs. I glued it back together with Loctite Super Glue "gel control". Fingers crossed it stays together! THANKS

[@zegolgti2000]

the manual says to drive with the key for a long period of time, like travel somewhere because the key is charged by the ignition barrel

[@jorgemat8080]

10byears later baby and still a great video. Bless you for posting this information up and helping thousands if not millions save money on these battery replacement.

[@poolshark1520]

I just screwed up mine with the bottom side soldering point. Those 4 points are much stronger than the ground wire going to the other side. Good luck.

[@mightbegenius]

mad respect for dissecting the electronic key

[@cantgetonline]

hi,many thanks for posting this vid. my battery has just packed up and with the help of this i will save a few pounds. thanks dave

[@denveryahr8562]

Definitely try reprogramming the key first. Insert, turn one click, hold first button while pressing the middle button 3 times. Look up other videos if needed. Good luck

[@workroommadness3921]

Whats the 1st button Etc? I need idiot proof instructions please.

[@nechifor9832]

@@workroommadness3921 Unlock button

[@infinitequality7606]

Did this a few days ago, works like brand new. Thank you man!

[@law3rence]

Really good man, you just saved me £££. I got a new battery on Ebay for a £6.00, good deal concidering the dealer wanted £185 for a new key.

[@markbhoward]

thank you! and shame on my beloved BMW for engineering the key FOB as a disposable $230 part!!

[@alberthgv]

Thanks man I decided to opened my remote and surprise one of the little metals that holds the battery was not touching each other so all i had to do is wall it to the battery and it work just fine. thanks.

[@Mzwandile_Makhowane]

YOU ARE THE MAN!!! You have just saved me 306 Dollars = R2700 South African rands. You are quite fabulous Julio, Thanks! Greetings from South Africa. :-)

[@Drew2two]

A safer/easier way to cut the key open is with a hot knife. One can be made with an xacto blade, a couple inches of bare wire and a soldering iron. Use the bare wire to attach the xacto blade to the tip of your soldering iron, simply wrap the wire around the blade and tip and you have a hot knife. At least now if you get cut it will be instantly cauterized!

[@dng1988]

you can change the battery, but you have to know that the chip has a program and a codes so if you remove the battery and hold the chip without power for over then 40-60 sec. it blocks and then you will have to re-programe the key. so if you are changing the battery, DO IT AS FAST AS YOU CAN. i hope you will get this in note! :)

[@EvolvedTCGLive]

And if you don’t?

[@largowski]

working!!! got battery had to program the key in dealer they told me 205e and that I cant replace battery... they can fuck off just saved 205e!!! Thanks man

[@robinmartz9052]

THANK YOU. I cannot afford to spend $300.00 on a new key. Other parts are bad enough! I love my BMW THOUGH!

[@michaelwoodsdale460]

Awesome! Thank you for taking the time to post this!

[@jrm220]

THANKS FOR THIS VIDEO. I JUST FIXED MINE. HURRAY!

[@chinnosequeira]

im so glad i helped

[@chinnosequeira]

@law3rence thank u...im really glad u liked the video and glad i could help you. Happy new year

[@brickceo]

BTW there is a video posted by MrAdk25 regarding this same subject, he does not know what he is talking about (full of Shick). this video actually works. Be patient with the cutting it quite difficult and if you rush you destroy the board. There is a chip seen at 4:30 it's the silver rectangle, it is just micro-soldered on each of the 4 sides and will come of really easy. I've watched this video 30+ times just to figure out which way it goes back on. Getting it wrong it will likely fry it.

[@chandlerh5009]

and as far as people with negative comments man....just act like u never even saw them. those people have nothing better to do then to hate on other people. do u man...dont worry about the haters.

[@jimhaggerty8230]

Lol he was so ready to put you in your place. knowing all kinds of things about how the door charges the key.

[@michaeljoseph8674]

Definitely check the voltage on these. Mine checked out, I only needed to simply reprogram it and boom everything works. lucky for sure

[@fleeflng]

The battery in the e46 fob is actually a rechargable battery. It gets charged up through the coil that's visible on the PCB. What happens when you replace it with just any CR2032 battery (which is not rechargable)

[@dianekonechney3811]

I am going to try this because we tried recharging it on a road trip and it didn't work. The other key works fine but my car is a 2003 325 xi w/156,000 miles and I love it!!!

[@ES-hr6vg]

I tried to change the battery while driving. I crashed. I hold you responsible.

[@gneesee]

Thank you so much😊 This is such valuable information. I was able to get the battery from Amazon for $7.91😃

[@pablosmokes2556]

What kind (battery part #)was it I about to replace mine.

[@rizz100z]

It worked for me bmw told me buy new key thanks for the vidio saved me 💰👍👍👍

[@scottyrob82]

Thanks a lot. I really appreciate it.

[@maxextz]

Thank you for taking the time to make this video.. Very helpful

[@chinnosequeira]

maxextz1890 im glad it was helpful for you.

[@santiagosalas1038]

First think I want to thank you for the video guide. It really helped... so far. When i was taking the battery out i damaged one contact near the battery and i'll see in the next days if it is reparable, if not i'll have to buy a new key, even because it's the only key i have that i can use as remote. But my question is: Isn't weird that the battery is rechargeable but there is no contatcs, none that you can see, from the metal part of the key going by the plastic 'till the battery(4:10)?

[@vincentwang6500]

Before trying anything, try re-program the key first. My 2000 740iL key went bad a year ago, then 3 months ago, my 2003 X5 4.4 key went bad too. Finally I have some time to see if I can repair these two keys by replacing the batteries. I went ahead cut open both keys to find out the exact battery to order. While googling for more info, I noticed some suggest these BMW diamond key is not fixable has to be replaced. So I took out my voltmeter and measured the batteries. Sure enough, both have 3.12 volt. Must be a circuit problem then. Before calling to order replacement keys, I thought I should try the re-program procedure first. I got nothing to loose. Wow, both keys are working after the re-programing procedure. Not sure why they lost the programming data after all those years, but as long as they're working, I'm happy. Now I need to buy superglue to put them back. Hope this helps!

[@whoeverwonders9892]

+Vincent Wang How can I reprogram the key? Thanks!

[@1fullsailkid]

www.autopartsapi.com/eEuroparts.com/technotes/BMWkey66126955748.pdf

[@larayneolson3736]

...mine is a 2002 BMW 325i. Worked like a charm.

[@henkusxxl]

Hi I just replaced my battery of my diamond key E46 remote key. I soldered à new 3.6 V Li Rechargeable battery in. Just used solder iron to remove and replace the old battery. Guess what. The old battery was just fine. It was not working becouse of à bad synchronisation of the key! I failed to resync as my knowledge of synchronisation was not right. My key works. Have fun!

[@chinnosequeira]

i simply used crazy glue. i worked perfect for me. its been 6 moths since i did the job on my key and its still nice and sealed. i would recommend u using t same glue. if u use something much stronger it'll be another pain in the ____ to open apart. u never know when u might need to open it again.

[@slavric]

Wait a minute. I was told that my remote charges itself from my car. Also the instruction manual says, if you have a key unused for some time, it is good to give it a ride to recharge... My car is twelve years old. I didn't have to replace anything in my key. Thanks for your info.

[@danielhercules763]

Hey bro this is just what I needed thanks. And let me apologies for thi "stop criticizing yourself everything we speak about ourselves comes back to us is the law of attraction. Anyways you help me out with this video so thanks see ya around.

[@douglasvilledarling2935]

great video, but you should tell people how to try to do a key initialization first. I did the key initialization procedure and did not need to replace my battery. Took 3 seconds at most.

[@jeremyjsilver]

+Douglasville Darling - If I hadn't seen you comment I would have shelled out a lot of money for a new key (I don't have a soldering iron to try the OP's process). All my key needed was to be reinitialized! Here are the steps: 1.) Get in car, lock all doors using main lock button in center console of car 2.) Key in ignition, turn one click on then off (do this a total of 5 times) 3.) Remove key from ignition 4.) While holding top button on key fob push middle button three times in a row 5.) Release top button on key fob 6.) Doors will lock/unlock by themselves if the reinitialization worked

[@noerror33]

Jeremy Silver Worked Great 👍🏾 Thanks 🙏🏽

[@gerwinleupen2223]

Can also first watch the whole video before starting doing anything..

[@sandrad9100]

How do you do key initialization?

[@batmanlivesinmybldg]

If you don't have a soldering iron or some kind of welding device then it will not work since the battery is welded to the metal connectors. Plus, the new vl2020 batteries come pre welded so you have to remove the metal strips from the new battery and weld the old connectors to the new battery. All of this while the new battery is leaking fluid from ripping off the welded medal strips with which it comes.

[@hermanwalz4869]

Very good find, I never realized the key battery could be replaced. Thank you.

[@nancyleathers4846]

My board is bad also. I need a new key at $180. Not happy. Thanks for the video. At least I know the dealer is not just lieing.

[@kcsnow9447]

@Julio Did you, by any chance, take a good, high resolution photo (one or more) of how and where the two halves of the fob snap together in the first place once you had cut this one apart? It seems to me there should be some residual tabs or snaps cast into both halves of the fob shell which are designed to snap together during original assembly, but which are not designed to be "unsnapped." But that doesn't mean they couldn't be--unsnapped--perhaps by twisting a screw driver blade with sufficient pressure at the correct point in the centerline slot, thereby prying the fob apart, rather than cutting it open. If you could post a shot online somewhere (assuming you did take one) it could only help. And In any case, thanks for putting up your solution to this problem. It gives me a baseline from which to (hopefully) fix my own, similar issue.

[@Andre_M_3D]

I just received my panasonic VL 2020 battery the other day and will be attempting the battery swap soon. I also purchased a keyfob off ebay with the 315 mhz chip and they say if the dealer will cut and program it to work with security theft system it will work. I doubt they will but it's worth a try. Otherwise i will just open my old keyfob up and replace the battery. I will let you guys know how I made out in a few weeks. Fingers crossed

[@finallyfamousjames]

did it work?

[@kysike666]

yes did it work?

[@soulman273]

Very nice video :) helped me a lot, the cutting of the key would be easier if you would reheat the blade with a pocket lighter. Thanks man!

[@dezie75]

Great my car is now a classic by the time I got to the end!

[@Chris-eo1bp]

when he said " insaye" instead of inside. I knew this would be legit.

[@TheTester1983]

WORKED FINE on my 320i 2000model. Had to reprogram the key. (Bery easy) I just glued it back together, but i don`t think it will stay together :(. Maybe i just have to buy i new one if it comes apart.

[@mtomar73]

This key charges by induction coil. Key has an induction coil that generates electric current because car's ignition column produces electromagnetic flux to charge it. Thanks,

[@chinnosequeira]

@bmw4ever55 Hey thanks 4 the comment, about the battery i say it at: 1:05 and about reprogramming it, i have heard many pp saying you have to reprogram but also read around many pp who didn't have to do so, personally i didnt have to reprogram mine. I really dont know what makes some pp`s key work right away and others dont. :/

[@jamesmorin1081]

Many thanks for your help, Julio!

[@skillz1855]

I've replaced many of them so kudos for posting this video

[@chinnosequeira]

u r very welcome...! im so glad for u that u fixed it

[@dapezent]

If this method is too troublesome, you can buy a brand new un-programmed key off eBay for around $60 US. You just have to get the blank cut to your original keys spec (approximately $4 AU at a keycutter). Programming your new key is easy (check out utube vids). Then you need to code the transponder chip, an automotive locksmith specialist or your BMW dealer are able to do this.

[@jmercado84]

I just learned that I did not need to replace the battery. I just needed to reprogram the key. A very simple thing to try before going all out

[@chinnosequeira]

thanks for the correction ^_^ hey give me credits.. English is not my first language :)

[@chinnosequeira]

its not a must, its just recommended so it stays in place. you know how often keys are dropped so.. just put a litte spot weld and that should do it

[@renragged]

Speaking of batteries... I think your smoke detector could use a new 9v.