Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [brake-booster]

A vacuum, electrical, or hydraulic driven component of a braking system on motor vehicles to multiple the manual force applied to a brake pedal operated by a driver

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1996 Ford E350 Club Wagon - Brake pedal will not return

I have a 96' Ford E350 Club Wagon. When I press the brake pedal the brakes work great however the pedal does not return fully. I have bleed the brakes, exchanged all the old fluid, checked the few rubber brake lines it has, replaced the brake…
itsrandywhoelse
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What reasons for a Brake pedal that depresses slowly

2003 Chevy Tahoe Z71 here. This morning as I was driving to work I noticed my brakes were a little unresponsive. I recently checked the pads/rotors and they are in good shape. When I push the pedal down, it seems like I can push it further than…
USER_8675309
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Power Brake Booster Removal

Can someone please explain the easiest way to remove a Power Brake Booster from a 1994 Honda Accord Wagon lx. everything has been dismantled. the hard part here is the removal only part. there isn't enough space to pull the booster out and away…
Sam Rosario
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Bad Brake Booster Check Valve?

1999 Nissan Almera N15 I noticed the problem awhile ago that occasionally the brakes wouldn't disengage. If I turned the vehicle off and pumped the brake pedal a few times the brakes would disengage. Now the only way I can get them to disengage is…
Robert S. Barnes
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Diagnosing Hydroboost Brake Systems

I have a 91 Chevy Astro with the hydroboost brake system. I took my van to a shop because I was having difficulties with the brakes. I was informed that this was due to low brake fluid and I needed a new hydroboost unit (the booster). I bought the…
KellyM
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Flute like sound when depressing the brake pedal, engine off

I have a Vw Polo 6n2 from 2000 without ABS. A while back I replaced rear drum brake cylinders and shoes and then I bled them. Concerned with the brake fluid level in the reservoir which went below minimum due to a broken wheel cylinder I went about…
neortic
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Brake Pedal doesn't Return after Replacing Brake Booster

I finally got around to replacing the brake booster on my 99 Nissan Sentra / Almera n15. So I removed the master cylinder, replaced the booster, hooked everything back up and started the process of bleeding the brakes. Low and behold, I press the…
Robert S. Barnes
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Gasket between master cylinder and brake booster?

So I replaced my master cylinder on my 1995 Acura legend and there a hissing sound coming from the brake booster area. Upon more thorough inspection, I found that placing my finger on the bottom side of where the master cylinder and brake booster…
sjfklsdafjks
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2004 Volvo XC90 Vacuum assist pump nightmare

My 2004 Volvo XC90 T6 2.9 has a Vacuum assist pump for the brake booster that should only come on briefly when the engine is cold and then not come on anymore. Mine comes on periodically all the time, mostly when I either step on the brake or take…
Xyourobob
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Low Break Fluid & Spongy Brakes

Good day all, I was driving the other night (about 3 days ago) and noticed my brakes feeling different as I had to floor it to come to a stopping point. I immediately came out and checked the brake fluid which was below the minimum mark and topped…
Daniel Prince
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What vehicle does this master cylinder and booster go too

This is a pic of my old master and booster off my 1966 chevy c10. It is not correct to vehicle. I'm trying to figure out what make and model vehicle this is for. Any help would be much appreciated. …
Jason
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Is a water-logged brake booster salvageable?

Last week water found its way into my M5's brake booster. The M5 forums document that people who have suffered from a similar problem will replace their brake booster to fix it. No mention is made of whether the brake booster is actually…
Zaid
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Front passenger brake keeps sticking at random

I have a 2007 Kia Sorento. 3 weeks ago the front right caliper or brake started sticking. So much so that there was an extreme amount of heat coming from the wheel area. So far we have replaced the brake line to that brake, the caliper, and the…
Tiffany Dearmon
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Changed power brake booster and drum brake rebuild and now the brake pedal sometimes gets stuck down while driving

What I did: I have a 1997 GMC Jimmy that I replaced the power brake booster and rebuilt the rear drum brakes (new brake shoes, springs, and wheel cylinders). I bled the rear drums since I replaced the wheel cylinders. I did not have to remove any…
AFatBunny
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Brake Lights Stay On

I attempted to replace my master cylinder and brake booster. Now my brake lights are stuck on. I recall a ratcheting sound after disconnecting the booster from the brake pedal. The brakes feel as if there is a normal amount of travel. I'm not sure…
Josh C.
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