Jumping in here because I've been researching this same issue for months. Honestly, I’ve had a really frustrating time finding the "perfect" fit because the RZ's trunk floor is kinda weird.

You might find this useful—check out the Lexus Owners Club forums or the RZ Forums specifically. There's a great resource at the ClubLexus technical threads where people post actual measurements.

I’ve tried a couple of setups and here is my technical take:

1. Lexus RZ 450e All-Weather Cargo Mat: The OEM fit is obviously perfect, but the lip is way too low. If your gardening pots leak, it's basically useless for containing spills. Plus, it's super heavy to lift when you need that charging cable.
2. WeatherTech Cargo Liner for Lexus RZ 450e: This has the high lip you want, but unfortunately, the material feels kinda plasticky and cheap for a Lexus. Groceries slide around like crazy unless you buy their extra blocks.

I’m currently eyeing the TuxMat Cargo Liner for Lexus RZ 450e because it looks more premium, though I'm worried it might block the sub-floor latch. Still searching for the holy grail tbh! Peace.

Seconding the recommendation above regarding Husky! I've been a car nut for years and honestly, safety is the biggest thing people forget with these heavy EVs. If a liner doesn't have those grippy nibs, it can slide and jam your hatch or mess with the sensors. Sooo, are you planning on keeping the rear seats folded down most of the time for those garden hauls, or do you just need coverage for the main trunk area?

Yo, congrats on the new RZ!! Honestly, I totally get the struggle with the trunk carpet. I’ve been through a few different setups myself over the years because I’m always hauling wet hiking boots and garden supplies. In my experience, that "premium" look is pretty hard to balance with actual utility. I initially tried a basic rubber one but it was sooo slippery... my groceries were literally sliding all over the place every time I hit the regen braking lol.

Anyway, I eventually found a setup that works way better. The one I got has these high walls that have saved my interior from at least three major spills already!! The best part is the texture—it’s kinda tacky so things actually stay put. About the charging cable access though... it’s a bit of a trade-off. Most heavy-duty liners are pretty stiff, so I usually have to lift the whole edge up to get under the floor. It’s a minor annoyance but way better than ruining the carpet, right?? Good luck with the search!

Bookmarked, thanks!

Like someone mentioned, the floor layout on these RZ models is kinda tricky. After reading through what everyone else said, it basically comes down to a trade-off between looking sleek and actually being a bucket for mud. I've been thinking about this all afternoon and tbh I'm still a bit uncertain about the best long-term play. I heard from a tech at my dealership that:

• The under-floor access is the biggest pain point for most mats
• Some high-lip designs actually mess with the latch sensors if they're too thick
• The material density affects how much the mat shifts during hard regen braking Not 100% sure but I think the trunk dimensions might even change a tiny bit depending on which trim level you have, especially with the subwoofer placement. If you're doing heavy gardening, honestly, maybe just get a heavy-duty tarp to throw over whatever liner you pick? I've seen some guys use those industrial rubber sheets too, tho they smell pretty bad at first. Just my two cents after dealing with EV cargo issues for a few years now.

Similar situation here - I basically tried to save cash with a generic brand off Amazon.

1. Fit was risky...
2. Honestly, just check out Husky products for better value!