How to fit a new key fob battery
#11
The following users liked this post:
Miguelsaav (06-07-2021)
#12
I purchased a 315 MHz one from Keyecu at Amazon.com, it was listed as "Keyecu Replacement Flip Remote Car Key Fob 315MHz PCF7941 for LR3 Range Rover Sport 2005-2011 FCC ID:NT8-15K6014CFFTXA". If you are not in North America, you may need the 433 MHz version, in which case you'll have to investigate further...
The following users liked this post:
Miguelsaav (06-07-2021)
#13
#14
You have a choice, either buy a new not programmed fob and move your PCB and key over to it or look for an empty fob case and fit your PCB and key in it. The later may be cheaper as you won't be paying for a PCB you're just going to bin.
Do be aware that moving the key over sometimes can be a problem, not a big one, but you could find that the button and blade in your old key don't just fit into the new case. You then have to detach the blades by removing the small roll pins and swapping yours over and securing it with the pin.
See my original post on this as I detail the procedure and have photos of it too.
Do be aware that moving the key over sometimes can be a problem, not a big one, but you could find that the button and blade in your old key don't just fit into the new case. You then have to detach the blades by removing the small roll pins and swapping yours over and securing it with the pin.
See my original post on this as I detail the procedure and have photos of it too.
Last edited by Alphamale; 02-01-2022 at 12:37 PM. Reason: Additional info.
#15
I did it both ways, bought 2 empty cases and transferred the electronics and keys, plus installed new "solder in" batteries, and also bought 2 unprogrammed fobs with electronics/batteries/blank keys. The keys had to be specially cut and I had to go to Edmonton (about 90 miles/145 Km) to find a locksmith who scroll cut the keys but I programmed them myself with the IIDTool. All 4 keys had to be present for the programming, and now I rotate them every month, when we go to the mountains we always take 2 keys with us. As others have posted, this is NOT something you want to go to the dealer for, their prices are approaching $500 per key...
#18
#19
I’ve used 2 Amazon blanks at $9 each and they worked out. I used my Dremel to smooth out the key housing base area in the new fobs to allow the key to flip out quickly on both. That took a little time but ultimately worked. Key 1 was just to fix the fob housing because the buttons were holes into the housing exposing the circuit board. The 2nd key had a dead battery that I got a replacement battery (it was charged upon receipt) on Amazon and did the soldering thing. When I tried using the new battery key in the ignition the key turned, dash lights came on and starter would not turn over. It refused to work. Then I tried the working key it didn’t work either. I waited 15 minutes then the working key worked. I’ve been afraid to try the new battery key in case it shuts the vehicle down again. The new battery key is an original key and knew the vehicle before the battery died so I hoped it would just work. So I’m back on the forum to see how to get it to remember the car, so I don’t have to go to a dealer. It sounds like there is a machine that can program the fob that we can buy for cheaper than going to a dealer. I need more info on that nifty gadget!