If they are original I would 2nd the speakers went out. The paper tears and the voice coil wires separate internally. Happened to mine. Sealing the paper tear worked with a hot glue gun but when the coil wires broke there was no way of fixing them without tearing the cones out. Not worth the money. Not worth buying used ones as they will most likely fail the same way.
If you have to replace them you can gut the old speakers from the mounts and install the replacements in the mounting bracket. (That is what I did) Or you will need to buy the correct spacers as most any speaker will be too deep and the windows will not go all the way down.
If you have to replace them you can gut the old speakers from the mounts and install the replacements in the mounting bracket. (That is what I did) Or you will need to buy the correct spacers as most any speaker will be too deep and the windows will not go all the way down.