badman5

I've had Tremendous Brake Squeal on my New Breaks for 3 months now. I had both my brake pads and rotors replaced 3 months ago, and my breaks still squeal below 20mph.
Is this something I should be concerned with? Can this cause damage to my vehicle?
I've attached a video of me slowing.
@bclexus <-bc you're an expert.
Brake Squeal Video

LeX2K

Not normal. Did you have the problem before the brake job? Damage is relative if the problem is left unchecked it could ruin the rotors. Won't hurt the rest of the car.

badman5

I did not have the problem before the brake job.
I initially ignored it because after Googling it was allegedly normal for brakes to squeal a little after new rotors.
example: https://autochimps.com/brakes-squeak-after-being-replaced

However, at this point its been 3 months

BMGS

iTrader: (1)

It's never normal to have squeal after a brake job. Anyone who says otherwise at a shop won't admit that a better pad/rotor combination can be used combined with a proper and thorough application of brake lube.

What pad/rotor combination was used?

93SCMax

Plus it's important to bed the new pads to the new rotors, most pad installation instructions will recommend this.

goose300

F-sport or regular model, and which rotors and pad combination are you using?

I literally just did a brake job a few days ago and can confirm 0 brake squeal whatsoever using Centric coated rotors and Akebono pads. I made sure to use high quality synthetic lubricant for the metal-metal contact points and then used Sil-glyde lube on the shim plates that touch the pistons. (I try to avoid using anything other than Sil-Glyde on any parts that might touch rubber as I've had issues where some lubricants can causing the rubber to swell)

FWIW, I have a non-Fsport AWD so I don't think they suffer too much from squealing issues, but the key is properly lubricate the pads and especially any metal-metal contact points.

badman5

Both were new pads and rotors from mylparts.com Lexus OEM. I didn't do the brakes, a mechanic did.

Part Number Part Name
43512-30351 Disc, Front
42431-30310 2013-2020 Lexus Disc Brake Rotor
04465-30510 2013-2020 Lexus Brake Pads
04466-30312 Brake Pads

BMGS

iTrader: (1)

I'm going to order new brakes soon and the parts specialist at Bell Lexus gave me the same part numbers for my car except there are two part numbers for each front rotor:

RH Front Rotor: 43512-30351

LH Front Rotor: 43516-30041

Not sure if that's the issue on your end but also make sure pads, shims and hardware have been lubricated properly.

badman5

I just double-checked another email and this is what was shipped, so I don't think I ordered 2 left front discs.

Part Number Part Name Price Quantity Total
43512-30351 Disc, Front $81.34 1 $81.34
42431-30310 2013-2020 Lexus Disc Brake Rotor $84.98 2 $169.96
04465-30510 2013-2020 Lexus Brake Pads $59.21 1 $59.21
04466-30312 Brake Pads $51.31 1 $51.31
47781-30240 2007-2020 Lexus Splash Shield $32.40 1 $32.40
4351630041 Disc, Front Left-Hand $81.34 1 $81.34


The first list I posted was a reminder of what i left in my cart

BMGS

iTrader: (1)

Ok then make sure whomever installed them used all shims (mine have two up front) from the prior pads and used a brake lube on the back of the pad and each shim and fully coated the hardware in lube. Unless there's a gross installation error the sound is likely from the absence of shims, lube or both.

JeffKeryk

Brake job was done incorrectly. Take it back. Good luck.

jgscott

iTrader: (1)

/\ This.

Take it back and tell them to go for a ride with you, and let them see and hear. Simple as that.

chinee

After 3 months? They'll just give you a side eye and chuckle... until you open your wallet again. Unless you have a good relationship with your mechanic.

Good luck... you're likely missing lube and/or shims. If you were so inclined, it's not a difficult job to do this yourself.

jgscott

iTrader: (1)

How long should a Brake job done correctly last problem free until they wear out down? How many months how many miles?

If good luck, find a more competent shop. Apparently they already did not do something right, based on the results right now.

richard203

iTrader: (1)

after 3 month most shop would say why dont you bring it right away and why bring it back after 3 month? im a tech and thats what I would say, no1 gonna wait 3 month if you hear noises after a job. for example u did a oil change and u c oil dipping will you drive the car for 3 month with the oil dipping and then go bak to the shop in 3 month and say ur engine knocking.