Key battery replacement & reprogramming. Permanently serviceable key fob | BMW e46 e38 e39 e53

Автокөліктер мен көлік құралдары

In this video, I'll show you how to replace the battery on the BMW e46 key fob. Unfortunately, BMW didn't make these key fobs serviceables from the factory, and they want you to go to their dealerships and buy a new one for approximately 120€. That's why people normally cut them along the seam, replace the battery, and then glue them back together. This solution is fine, but I decided to design & 3D print a plastic case to be able to assemble/disassemble the key as many times as I want, even though you may only need to do this once every 10 years.
You can download the files and print one if you want. The link to the STL files, it's for free:
www.thingiverse.com/thing:622...
0:00 The problem
1:28 Part1: Key battery replacement
2:54 Battery specs
3:02 Part1: Key battery replacement
4:00 Desoldering old battery
5:03 Installing new battery
5:19 Key synchronization issue
5:48 The solution to the key synchronization issue
6:14 Key synchronization
6:54 Part2: Making a key fob case
7:38 Iterative design process
11:33 Final design & full assembly of the key
12:01 Aesthetics
12:04 Final result
12:15 Requirements validation
12:39 Link to files in the description
12:52 Regrets & Coffe

Пікірлер: 35

  • @chlorox01
    @chlorox019 ай бұрын

    An absolute saint. My key is currently held together with duct tape because I had to change the battery and it keeps falling apart, so this is perfect

  • @alexderkach_

    @alexderkach_

    9 ай бұрын

    My pleasure man! Glad someone found this helpful. I've been using this case on my key fob for three weeks now - so far so good 👍

  • @Deses
    @Deses4 ай бұрын

    I designed a whole new enclosure for a friend of mine, I finished it last week and still haven't published it lol, but it was a fun exercise and my friend and his family are delighted with the new key. I didn't bother purchasing a new battery, though. I just cut the old one and capton-taped a new 2032 to the contacts. Works wonders.

  • @juhanijelonen
    @juhanijelonen6 ай бұрын

    Thanks for the video! I am going to try this. Yes, the key charges with induction small amount every time you push it to the ignition or turn it (not sure witch). You can also charge it by placing it on top of electric toothbrush charger :D

  • @alexderkach_

    @alexderkach_

    6 ай бұрын

    Oh, thanks for the info and for your nice comment!

  • @BMWdanevidq
    @BMWdanevidq18 күн бұрын

    Bro, just put a silicone cover and attach a keychain, that way it is to some extent water and dust proof and even if the silicone case fails the keychain will still have everything attached. Ran with my key sliced open like this for about a year, zero problems.

  • @alessionicola1037
    @alessionicola10375 ай бұрын

    Truly a great video and project .I was doing the same thing in recent weeks with my Neptune 4 pro, after several attempts I threw all my prototypes in the bin. Grazie mille A thousand thanks

  • @alexderkach_

    @alexderkach_

    5 ай бұрын

    Thanks @alessionicola1037 !!

  • @ctvediting
    @ctvediting5 ай бұрын

    Leave key in car over night to recharge. Yes, it's induction, and charges when the key is in the ignition.

  • @bartsprengelmeijer4825

    @bartsprengelmeijer4825

    Ай бұрын

    You can also use a toothbrush charger, just place the key on top of it

  • @M1ghtySlav
    @M1ghtySlav5 ай бұрын

    awesome video, helpful and entertaining glad I bumped into it , Grazie

  • @_Project46_
    @_Project46_Ай бұрын

    Nicely executed video👍👍

  • @alexderkach_

    @alexderkach_

    Ай бұрын

    Thanks!!

  • @unrefinedprojct
    @unrefinedprojct4 ай бұрын

    Awesome! Subscribed! Thank you!

  • @alexderkach_

    @alexderkach_

    4 ай бұрын

    Wow! Huge thanks!

  • @josephpalazzo3589
    @josephpalazzo35896 ай бұрын

    Sell this as a Repair kit , I would buy 2

  • @alexderkach_

    @alexderkach_

    6 ай бұрын

    Wow thanks! What price you think would be acceptable for a kit like this?

  • @josephpalazzo3589

    @josephpalazzo3589

    6 ай бұрын

    $29 usd@@alexderkach_

  • @Hargy90

    @Hargy90

    5 ай бұрын

    I'd probably just change the fuse and sidestep changing the battery. 😅 Good work though. Great patience. There are key cases available in different colours that i think clip together, there similare to yours but far more bulky. I had one a while back, but you might pull inspiration for your next iteration.

  • @priit7777
    @priit77774 ай бұрын

    Only 120€ ??? they are asking me 240€ for key + 67€ for reprogramming ... 3:05 you see the copper coil there? it's wireless induction rechargeable like modern mobile phones. The charger part is in-build into your car near ignition, so the key will recharge while driving -- at least it's supposed to, if your battery has not died to old age and the charger there has not died. LUCKILY for me, I was able to buy from amazon the "blank" BMW key chassis/fob with new battery (openable, not glued together, so permanently servicable) for like 10€ + 15€ for the key copy part at local locksmith; then I cut open the old key fob, replaced the battery myself (some soldering required), and inserted the old key circuit with new battery to the newly cut amazon key fob/chassis and it looks perfect (except missing bmw logo). Much easier for "normal person" than starting 3D printer hobby ;-)

  • @TangoOne
    @TangoOne2 ай бұрын

    What's really fun is when the key fob stops working and then your door lock on the driver side (the only one on the car) breaks and then you can't get into the car, forcing you to break the rear quarter glass to be able to get into the car.

  • @alexderkach_

    @alexderkach_

    2 ай бұрын

    If this happens to you ever again you may wanna try the duct tape method to roll the window down

  • @TangoOne

    @TangoOne

    2 ай бұрын

    @@alexderkach_ Thanks I'll look it up. When it happened and I called around and the locksmiths or tow companies would not touch it because it was a BMW so I was on my own.

  • @dahly8184
    @dahly81846 ай бұрын

    Nice this video hopefully help me. I order a new battery and a new key from amazon 10 euro E46 coupe 328i

  • @alexderkach_

    @alexderkach_

    6 ай бұрын

    Thanks! 328i E46 coupe - great car 👍

  • @dahly8184

    @dahly8184

    6 ай бұрын

    @@alexderkach_ Thx i just picked it up. So the Battery in the Key is bad and i cant open the passanger side from outside only from inside so i hope i can fix this. And it got sunroof to ;:D

  • @alexderkach_

    @alexderkach_

    6 ай бұрын

    You’ve made an excellent purchase, sir. I only wish they were more affordable, cars in general have been getting crazy expensive around here. Thats partially the reason why I’m sticking to my high mileage hero 320td

  • @liquidalex772
    @liquidalex772Ай бұрын

    what fuse tho put when i want to replace it?

  • @alexderkach_

    @alexderkach_

    Ай бұрын

    5A fuse

  • @franzbiehler269
    @franzbiehler2696 ай бұрын

    1:23 1:24 1:25 1:26 2:05

  • @jones9983
    @jones99833 ай бұрын

    Can you sell it? I need new key so just asking :D my battery died

  • @alexderkach_

    @alexderkach_

    3 ай бұрын

    Maybe it’s time for me to set up an Etsy account. Would you accept buying it there?

  • @aussie5.063

    @aussie5.063

    3 ай бұрын

    I would, just done the superglue method yesterday.

  • @alexderkach_

    @alexderkach_

    2 ай бұрын

    Ok, I’ll look into it and update you in a pinned comment on this video.

  • @ElChUwUaKa
    @ElChUwUaKa9 ай бұрын

    Overly engineering BMW problems

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