Mine were easy... at least the speakers (I did a lot more than just speakers). To remove the dash speakers, pop up the covers (they snap off), remove two screws, unhook the harness. Snap in the new speakers to the harness (or cut it off and connect them), drop new speakers in. You may or may not need a speaker mount (I didn't). My 3.5 replacements were large and I was worried there might be an issue, but they set snug right into place. I couldn't bolt them down... I was going to get back to that, but they set in so firm I don't know that I need to. Been in a couple weeks now with no issues. The stock dash speakers are 8 ohm, so keep that in mind. If you replace them directly with 4 ohms, they might be louder than the rest of the system and make it sound unbalanced.