LeX2K

Maybe I'm wrong but going by the image posted it's the friction surface that is rusting the brake pad doesn't contact that part of the rotor.

Urlik

Good point. If you zoom into the caliper and look at it’s inside line, seems to me like the rust is not where the pads make sweep.

Barncobob

some porsche 911s have that problem. The fix is to take wheel off , derust it and put a thick coat of paint usually silver or black to stop the rust,

Longevite1

Not much for our car, exposed to road salt for a couple days, and we washed it off about a week later.

E46CT

Certain OE, OEM, and aftermarket rotors are coated or painted (same thing for all intents and purposes) then the brake pads wipe off the coating where it doesn't need it. Then everything else stays nice and unrusted.

But it's fine and just unsightly. there's no functional issue.

this is just a matter of (apparently) lexus deciding to not paint/coat their rotors. just a cost thing.

if i'm not mistaken, my Lexus IS from 2016 had coated rotors. the parts where the pads did not touch (the hats) were painted black.

these are raw.

Urlik

They aren’t “raw”, probably zinc coated and it isn’t holding up at all against brines and salts. I live in the south and have no rust.

Edit: I went and looked again on our RX350. The rotors are definitely not zinc coated because an inside line on the braking surface and the vent vanes have surface rust. The rotor hats do not and appear to be painted. If they were zinc coated that is done by immersing the whole rotor and I wouldn't be seeing rust in the areas I see it.

jsch222

mine look the same as @Longevite1 OPs look extreme and possibly like they weren’t coated right. I live in St. Louis and our roads got hammered with salt for 3 weeks. It was horrible. I sprayed the car off a couple times during that period just to keep the impact minimal.

Carbuff2

After several seasons, there COULD be a functional issue:

The rust will 'bubble' and form a rusty ridge on the un-swept area. This could cause vibration under braking.



Some DIYers (like me) have been known to sand/file the ridges off otherwise good, properly thick rotors, to prolong their life.

jcheng

I think it's because the calipers aren't actually used as much as opposed to ICE vehicles.

Since the regen braking is strong enough to stop the car in stop-and-go driving, I don't think the calipers are even used unless it's heavy emergency braking.

I have almost 9k mi and the rotor still has the original score marks on the rotors.

Eatthiss

i was told they will replace it for me

CommodoreAmiga

The regen definitely will not stop my RX500h. It’s so weak!

Carbuff2

I bet that a 350h or 450h+ uses a lot more regen than a 500h. Otherwise, why would they tout the big brakes they fitted?

rx24owner

Hello

I have a 2024 Lexus RX 350H, bought in September 2023. Vehicle has ~6000miles on the odometer. I am already seeing rust on the wheel rotor (disk). Is this normal? How can I remove it? Is it covered under warranty?

Thanks

CommodoreAmiga

Looks normal to me. Leave it alone.

When you eventually replace the rotors due to wear you can choose an aftermarket "coated" option. But I wouldn't change them early just for what you see in the picture.

Dhill

LSFT on the NX forum made a video on his year 2 service and discussed this with the service dept. Since the hybrids use regen braking, the real brakes are not used much so rust builds up on the brakes. Suggestion was to have the rust removed via service $$ or hard break more, not sure about that. I don’t think it should be a problem, but it would not hurt to ask your service dept. Here is the link to his thread and video.

https://www.clublexus.com/forums/nx-...ownership.html