xMJx

iTrader: (1)

Interesting. Mine looks the same.

xMJx

iTrader: (1)

It's hard to get a pic of it but I had a mechanic look at it. He used one of the small mirrors dentists use and there was plenty of pad left. Maybe the pad in the back is worn?

xMJx

iTrader: (1)

Thanks for the suggestion. Gonna have to look into this...

chuckGS350

These are the rotors on my 2011 RX350.
My 2007GS350AWD has different rotors. Lexus replaced them out of warranty after a few trips to dealership for squealing noise.

GS350Lexus

iTrader: (5)

They probably had old stock of rotors or It just depends where they are made, but as you see few people have the cut outs like me. I have to say with the cut outs, I did notice for them to run cooler then without.

chuckGS350

The rotors are another new design. Lexus replaced them along with new pads under L-SB-0011-11 Squealing Front brakes. After two years and 30K miles riding on them, still no squealing noise. Knock on wood. I don't know why the new design rotors are not for sale. Probaby they only work with new design Blue (low dust) pads.

Lexus replaced the rotors and pads under L-SB-0040-09 four yeas ago. The new design rotors and pads didn't work. The squealing noise came back in a few months. But not terrible comparing with the original squealing noise. Only happened on the first tap at the brakes.

XxGoKoUxX

Ohh, that makes sense.... From the picture he took, it looked like literal slits and cracks....

My bad guys my bad!

My Rotora rotors aren't slotted there, I have slotted/drilled rotors though.

Keep us updated on the shims ordeal! It'd be a great addition to information for other future members having this problem xMJx

GS350Lexus

iTrader: (5)

I had black, blue and green (OEM Lexus ) brake pads with few original sets of rotors and few sets of shims, the squealing is still there. A lot less but it is there, the only pad I did not have squealing with was EBC red stuff but I have had numerous other problems with them. In my trunk I have sitting Stoptech brake pads, that I shortly will be installing without changing out my rotors. I will let you guys know how they are.

xMJx

iTrader: (1)

Okay, so I took the car to a tire&brake shop. Shims are present and accounted for. Front pad are new, replaced not very long ago. The mechanic said the rotors were not machined when the new pads were put in and that may be the cause of the noise. Im debating whether or not to redo the front brakes correctly. If new ceramic pads are cheap then it might be worth it to see if that gets rid of the noise.

xMJx

iTrader: (1)

So I think I've finally resolved the grinding noise issue. The noise came from a combination of used un-machined rotors combined with new metallic pads. Also, they were glazed. After machining both, the noise has mostly gone away. I believe ceramic pads along with a machining the rotors will rid me of the noise completely.