OK, I know that I will feel real stupid when someone tells me how. I have a 04 LS 430 with the Smartkey fob (see pic)
I can not see how to open this smartkey to change the battery? Any input/help.

Thanks,
Mike

 

See the switch like slider on the bottom of device (bottom of your pic)
1. slide it to the left (only way it can go) as you slide it, you can see a pin move right to left.
2. with your other free hand/nail or something, there is a small grove still on the slide part on the right of it. Put your nail of something in there and as you slide left pull down or out on it.
3. that opens up compartment for battery replacement, uses standard battery found in watches and crap.

Cheers

 

Do you see that release clip that frees the mechanical key?
Pull it as if you intended on releaseing the key, then pull that entire side (comes off like a hat.)

Then you pull the remote from inside, and you can get to the battery from there. Hope this makes sense.

 

Got it! My battery just died all of the sudden today. Got it open just like you said. Had one of the same batteries at home (same as used for my dogs collar - invisible fence) put it in and all is well. You all are great. Thanks for the help!

Mike

 

FYI: it uses a single CR2032 battery.

Now, does anyone know what the part number is for the outer shell as I want to replace mine?

 

I purchased my second key from Sewell, I would just call them and ask about the shell only. www.lexus-parts.com Hope this helps!

Mike

 

Check the manual that came with your car. It describes the procedure perfectly.

 

They recommend that you use a narrow screwdriver. I'm not sure if your nails would work- ouch!

 

I hope you don't mind if I piggy-back on an old thread...

I was helping a friend, & when I pulled out remote battery, there were two(2) batteries in there !!! Crammed into the circiut board assy.!!! One(1) CR2016 and One(1) CR2025. They barely fit into the assy.!!! When I put in CR2032 the battery was loosey-goosey a little bit.

Now the remote does operate, but does not open the trunk.

I naturally have some questions:

1. Has anybody else run across this ?

2. Do you think the remote has been damaged irreverseably ?

3. When you stack 2ea. 3 volt batts like that, don't you now have 6 volts ?

4. What are the possible results of that ?

jim