They look closer to 6000. Have mine in for about 3 months now, nothing changed and I doubt it will.
Do it in a well lit place, or better yet outside on a sunny day. All you need is some needle nose pliers and some patience. I forget which side, but one of them is much easier to get to than the other, so practice on that one first. Also, do not disconnect the wire, grab onto the tubular bulb housing as close to the back of the headlight as you can, twist gently and pull out. It will comeout with the bulb. To make sure you are pullingtwisting the right thing just look at the bulb thru the headligh, it will obviously move as you try to manipulate it out.
A word of caution, not all W5W replacement LEDs will fit inside the headlight widthwise. Make sure to buy the flat ones like pictured above, some have 1 or 2 leds per side.