Where is the drain plug exactly on a 2003 kia rio?

drain plug for engine to change the oil? look on the bottom of the oil pan of the engine. it will be on the lowest part might even be on the side of the oil pan.

Don't know what model you have. 03-05 Amanti has fuse AV audio. fuse box diagram below.
https://www.autogenius.info/kia-amanti-2003-2005-fuse-box-diagram/
03-06 Sorento
https://www.autogenius.info/kia-sorento-2003-2006-fuse-box-diagram/
03-05 rio
https://www.autogenius.info/kia-rio-2003-2005-fuse-box-diagram/

cant see a drain plug on the pan in this diagram
you may have to get a pan gasket and filter
undo the pan to drain all the fluid out

Most cars, you have to drop the entire transmission pan to drain out the fluid. You have to buy a new pan gasket and filter too. Use Dexron VI transmission fluid. Total 5.9 liters. This is probably for the total system capacity. When you drop the pan, only about half of the transmission fluid drains out of the system. Only a professional shop can push out all of the transmission fluid.

find the transmission oil pan. It may have a drain plug on it. Drain it measuring how much came out and put the same amount in. Then start vehicle and while on the brake shift through all gears. then check the level with the dipstick. If there is no drain plug it must be flushed by a shop. Or you can drop the oil pan and replace it with a new gasket.

2003 kia rio, It is located under the intake manifold. Get underneath the car, pull the oil filter...it is right above it and in clear view with the oil filter out of the way. The connector plug is up top behing the air breather on the firewall.

which plug oil is on the oil pan trans is on the trans pan oil pan is on bottom of engine

its the pan thats bolted to the bottom of the transmission about a inch deep usually square

You pulled the plug wires to find two plugs? Unbolt and remove the coils to find the other two.

first, you have to drain the oil from the drain plug located at the bottom of the oil pan,

after all of the oil have been drain, tighten back the drain plug bolt.

then remove the old oil filter by using a filter wrench, you would need this wrench because it is very hard to remove by plain hands. the oil filter is located at the bottom of the engine or sometimes at its side.

after removing the old one, apply a thin coat of new oil to the rubber o-rings of the new oil filter before inserting just to make a good seal as you tighten it.

now open the oil filler cap at the top of the engine and pour the exact amount of new oil that was specified in your book. and also the correct type of oil that it uses.

then start the engine for 5 mins, turn t off and check the amount of oil at the dip stick. add if necessary..

i hope i was able to fix ur problem...

tnx 4 using fixya

drcool