When you use a fusetap to power the detector, you cannot put the fuse box cover back on. Are there after market covers that would give you the extra room needed or do you just leave the fuse cover off the fuse box?

 

I think most users are not tapping into the fuse box any longer, but are getting the power from the wires behind the rear view mirror. A search on this forum will disclose several discussions of how to do this.
Also, there are several products designed to make this pretty easy. Look for "Mirror Tap" and "Blend Mount" for more information.

 

i see that as a much more dangerous way to go with all the technology installed in and around the rear view mirror. I would not want to chance anything causing a problem with that technology and with the 10 year platinum warranty on the car.

 

I just left the cover off and put it in the center console. Don’t see it, don’t care.

wiretap into the mirror is fine. If you look at the wiring diagram the power (at least on a 2019 es 350) is just for the mirror.

 

I used a low-profile fuse box adapter and just left the cover off. I don't think the chance of damage or contamination is significant since it's pretty well hidden. And it's not visible at all so aesthetics isn't really an issue.

I think I tapped into the power adapter or IGN fuse. Can't remember. It comes on when the car is in accessory mode. Easy enough to tuck the cable around the dash panels and up to above the instrument cluster. I did the same thing with my dash cam.

 

Over the years, I have used all kinds of taps for a switched power source for my detector. I have also found that many how-to notes and videos can be inaccurate with respect to the color of the wires you want, probably because the manufacturers change the colors (perhaps to match the season).
Always verify your connections first with a voltage meter to be sure you have a switched source and a good ground (not necessarily a wire - often a nearby screwhead is an easier ground).
The newer tap-ins for the wiring connectors can work and can be easy to install; just be sure to get the little pins snugly into the connector. I used that on my RC and now on my ES, and it works very well.

 

I found a guy on etsy that is going to make one for the 2025 ES350. He already sells some for other Lexus models.

 

HldMyBeerEngineering On Etsy made me one for the 2025 ES350. It fits perfectly and the fuse box is covered and protected with the fuse tap installed.