The remote control for my VY Commodore recently started losing a lot of range. I’ve had this before with a VS and knew the batteries could be changed, so decided to show you how it’s done.
- Car key
- Soldering iron
- Some kind of desoldering tool – either solder wick or a solder sucker are easiest to come by
- A new battery – you’re after a horizontally-mounted CR2032 with solder tags. I bought mine from Retro Sales for $1.80
- A selection of flat blade screwdrivers – a couple of jewellers ones and a couple of medium sized ones
- Philips #1 driver
- Wire cutters
- Super glue
- Unscrew the two Philips screws holding the key blade in place
- Use a thin screwdriver to start to prise apart the two halves of the key fob. Take care that you don’t damage the fob too much, and that the screwdriver doesn’t slip and either cut your hand or slip inside and damage the electronics.
- Once you’ve got it slightly apart, get another person to slide a thin screwdriver into the gap between the two halves to hold it open. You can then start working a larger screwdriver into that gap to open it further.
- Slide a larger screwdriver into the gap when you can, and then slowly slide this around the fob until the two halves are separated.
- Unclip the pin attached to the front of the key fob.
- Slide the rubber gasket off the end of the electrical contact and remove the circuit board.
- Desolder the two battery contacts and remove the battery.
- Install the new battery, noting the polarity. The negative terminal is at the edge of the board.
- Push the rubber gasket back into place.
- Run a thin line of super glue on the key fob just inside the gasket and press together firmly. If necessary, clamp the key fob together and apply further super glue from the outside.
6 thoughts on “How to change the remote control battery – VR-VZ Holden Commodore (1993-2006)”
Very informative ,thanks for the time you put into this.
Where do I get the CR2032 battery from as per your video clip.
Can get the battery without the arms but need the same battery as you displayed.
Glad it was helpful! I got the replacement battery from https://www.retrosales.com.au/products/parts-modding-battery-save-game-cr2032-cr2025-cr2016-cr1616-tab-tabbed?variant=25772027216
Thanks for the excellent video demo. For my VY Commodore, the key was working okay, but one button was missing. I purchased a replacement key shell on eBay and swapped the original circuit board over to the replacement shell. After reassembling, I found the key wouldn’t work. I was very careful in handling the circuit board as I am used to working on small electronics with my model trains. A check of the battery indicated 3.1 volts which surprised me as the car is 18 years old and the battery has never been replaced. Any idea as to what the problem(s) might be? Can it be repaired and if not, how do I go about getting a replacement key? Thanks for any advice you can give me. John.
Thanks for the comment. So you’re saying the electronics side of things was all working fine – you then pulled the complete electronics board out battery and all without modification, popped it into a new plastic case, and then the electronics stopped working? Assuming I’ve understood correctly, no ideas seem particularly likely as obviously the plastic case has nothing to do with the function of the key. But here are a few ideas out of the realm of unlikely ones:
Good luck, and let me know how you get on!
My cousin is a locksmith of 25 years and runs his own successful business along with 10-15 employees. He told me that you must maintain a constant power supply to the remote when removing the battery if you want it to work as per the video. I believe that this video gives you a false report on the true outcome of once you have removed the battery 🔋. The truth is that you can program up to 8 keys to a car. Once the battery is removed from the case, the information that was stored in the remote is now lost, from what I am told. 🤷♂️
Perhaps some keys store the information in memory without having battery backup and some types do not…??
If it were this easy as per the video, that is pretty cool and is a great money saving exercise. $3 compared to $150 is great…
I wouldn’t attempt it unless I already had a second key that was in good working order, so if this experiment fails, you at least have 1 key that’s information can be copied to make the spare key 🔑 .
I don’t trust many people and especially those that stand to profit from you with their lies, however I do trust what my cousin has told me and I am a little skeptical on this information provided here….
It may well work but….🤷♂️
Thanks for the comment Paul. This explainer was specifically about changing key batteries on a VR-VZ Holden Commodore, and I’ve done this twice on both keys with no problem of lost programs. I didn’t suggest the same process would work on any other vehicles. Your cousin is possibly right that some other keys would lose their program, but that information isn’t correct about this key (or indeed about a Mitsubishi key I also did a battery replacement on recently https://youtu.be/HN008fljAY4). It is possible these keys could lose their program if the battery went completely flat – possibly there was enough charge in the battery to retain the program but not to power the transmitter (though it would be a poor design to store the key’s program in volatile memory). I don’t know. But either way, pulling the battery out for several minutes didn’t cause program loss on keys from either vehicle.
So yes, it is as easy as the video shows which is why I’m sharing it with others and definitely no lies going on here if that’s what you’re suggesting. I don’t profit by people reading my blog.
I agree with you that having a second working key is a valuable safety net, and in both cases I made sure I had a second working key to use in case it didn’t work before I started filming. But since the first key was already not working I didn’t have much to lose by trying. If I only had the one key and I was unsure if it would work, I also agree with you that the safest option would be to apply some backup power to the key. However having done this on both the Commodore and the Pajero, I know a backup supply isn’t needed for either, and that’s valuable information for owners to know so they don’t have to worry about finding a backup power supply to replace their key batteries.