Strizel

My 2000 GS 300 has developed a weird sound form behind the dash shortly after being turned on. It sounds like Star Trek phasers going off.The brake pedal is also vibrating in conjunction with the sound.No warning lights or dash lights are coming on. Break fluid level is within normal limits.

Anybody have any clue what this could possibly be? I'm Not sure how to upload a video but I have put in the link to the YouTube connection. It is insanely loud.

808Garage

I would check under the dash to see where that sound is coming from. Possibly around the brake pedal. Look for relays or switches. Good Luck.

rgarjr

iTrader: (1)

Sup broh.. I know exactly where that is coming from. it's your ABS/brake booster that just went bad. Open your hood and get near the BMC to confirm.

Mine did the same thing about 2-3 years ago, got another used one and put it on and now it's doing the same thing.

Dawa

iTrader: (5)

what a weird *** noise. im not sure if its your brake booster, but i can tell you that driving with a bad booster isnt necessarily bad, your brakes will still work, you just dont have the assistance of engine vacuum. but of course that sound is annoying as hell so i would definitely want to fix it.

as for the vibration, one thing that causes vibration is warped rotors, which are very inexpensive to replace usually, approximately 30-40$ from aftermarket companies

rgarjr

iTrader: (1)

Yeah it most definitely is an ugly *** sound to have blaring all the time when you drive. A lot of members on here have referred it as baby eagles screaming.

burny

what is the part needed to fix this and how much is it? I was looking at Sewell's and there are several items listed. Future reference, thanks

rgarjr

iTrader: (1)

Most owners with this problem just replace the whole brake booster/master cylinder part.

Strizel

To clarify the vibration is happening when the car is stopped and feels harmonic with the sound. So basically rotors are fine and I'm sure the sound and vibration are connected.

But you guys are awesome, I will definitely check out the booster. I'm just curious if the sound is an intentional alarm for the failure or just the sound the booster makes when its gone bad.

I'll check out others threads but do you guys know if any ones posted DIY on booster replacement? Quite honestly had never heard of a booster.

Strizel

After looking at part costs on Swell parts ($2300 for the entire assembly) and judging the complexity of the job I decided to let the professionals take care of replacing the master brake cylinder. Rebel Auto charge me $2100 total. Not sure if that was a good deal or not but sound decent when the cheapest I could fine the part was $2300. Scary thing was they weren't sure if that was the problem. I'm really curious if you could get away replacing just a section of the MBC.

So far no sounds with the new one.

repugnante

The wise choice would've been replacing that unit with an 01+ unit. But it's new and the problem went away so no worries...

rgarjr

iTrader: (1)

Yeah I wonder if the OP got the 01-05 one? I had the same exact problem and just now put on 05 unit on there.

Strizel

Wish I had known you could do that. I'll call tomorrow and see if they can tell me the part's year?

KAJmapper

I would like to buy your old brake booster from you guys

KAJmapper

Please pm me