My IS350 makes a wierd popping sound when i back up and hit the brakes and then go forward and hit the brakes... ie pulling out of the garage. I called to make an appointment at the dealership and the service adviser told me that it is just brake pad shift. Basicly the pad just moves back and forth in the caliper, front i think. I think this is bull@#$% myself. Just wanted to get everyones opinion.

 

actually, i very much think it's true. same thing happened to my gs400, sc430, and is300 stock brakes. i find it pretty normal.

granted, it COULD be some other reasons, but brake pad shifting a bit when going forward and backward, that's possible

 

i have what you describe, i think its normal. its happened on my hondas, granted not as loud (smaller brakes).

 

Happens all the time.

Along with the THUNK coming from the back, on my first BUMBS coming out of the garage.

 

i have the same noise, i think its normal

 

creaking groaning noise? Could be when the brake pads are jumping from static and kinetic friction like how tires squeal when you break from grip and non grip

 

I have the same exact noice, everyday the first time i put my car into reverse and back out of the garage, as soon as i release the brakes and start stepping on the gas i hear (clang!), I don't
think because most of our do this, that it's "ok"..Since no other cars do this it's obviously
some kind of design flaw, we all bought lexus on part , not to hear these kind of noises... If that were the case I would of bought a Ford..

 

I don't hear any pops or clangs, but I will often hear a slight groaning when backing up first thing in the morning. Once the car has been driven a few miles, backing up is silent. It only started making noise recently.

 

Mine does the same since new.

 

Its not a design flaw.

My 96 honda did this too. If it was a design flaw then it would of been corrected 10+ years ago.

Maybe they don't want the brake pads to be 100% exact fit into the calipers. Which makes sense because if they were replacing the pads would be a biitch and nearly impossible.

 

also if it were exact size if the brake pad expands from heating up its going to buckle and crack the pad. Room has to be allowed for caliper and pad expansion due to heat

 

I have the same sound / situation on all the Lexus cars I've owned. My IS, '01 GS430 and my wife's '02 RX300.

 

I think somebody commented on this in the past as well. Correct me if i'm wrong, but I believe somebody said that the IS uses floating calipers? Oh yeah, mine does this too so I assumed that this was normal.