Locked my keys in trunk of 2002 kia rio , how do I take out the back seat??

Yes they do

Open the back trunk, look near the top of the trunk, and pull the two black levers. They have a seat folding down symbol. That will release the locks.

I too have had the same issues with my 2004 Kia Rio. I personally believe that this should have been a recall in the door locks. I went to a pick and pull and retrieved the drivers side and passengers side locking mechanism from both doors (not the locks themselves because I needed to use the same key) and one worked like a charm and the other didnt. I since have went back and got another one and that one stopped working correctly. It seems that this a major issue with these cars.

put fuse back in disconnect batt wait 60 seconds re attach, when the horn starts honking lock and unlock drivers door with the key while doors closed window down. get in car and start it, should be fine now.

Disconnect and then reconnect your battery will sometimes work...it might be worth a try.

if u cud get into ur car take the back seat off ull have acsses to ur trunk.

By switching the lever you locked the inside trunk release, you will need to put lever back. as far as the trunk you may need to remove the rear seat, pop lower part out and then remove the bolts to the top half of the seat then try to reach the lever so it will open from the inside. i've found that many of these cars with the pop lever inside have sticking trunk locks from not being used, what you do first is spary lock good,with wd40 or pb blaster then slide key in and out and try to turn this may take a whhile but it works then tumbler will free up, you just have to keep spraying inside lock and working the key.

Tahe a metal hanger, straighten everything except the hook, stick the hook on the lock mechanism and pull hard and fast. If you go too slow the hanger will bend**to be more specific the locking mechanism is inside the child seat anchor, located behind the headrests in the back dash area on either side of the vehicle, pull the grey casing out of the backdash and if you look inside there's the latch, make a nice bend at the tip of the coat hanger and pull the metal latch pull,not the cable(i almost snapped mine :0 )ive done this with 100% accuracy on an 06' and 12' models but any model with upper trunk rear folding seat latches should be fine.

have to change seat belt

call a lock smith they can make you a key right there on the spot,that is if they are as good as my GUY.

BEST THING TO DO IS TO GO TO DEALER AND HAVE A NEW KEY MADE - THEN YOU HAVE A SPARE WHEN YOU GET YOUR KEYS BACK