1999 Lexus LS400 Base 8 Cyl 4.00L
Booster AND Master Cylinder?
Brakes are not working right, they feel funny, unable to press all the way down, or when I get them to go down, I cannot count on the timing to get the car to completely stop, but not making the sounds I normally hear when you need to replace them. Mechanic says it needs a booster. I'm okay with that, but the mechanic is saying that when the booster is replaced, the master cylinder probably needs replacing, too. I asked him, how will we know if it does? He said when we take take apart the car to put in the booster, we will be able to tell. But, it cost a lot less to do it then since we already have the car taken apart and you won't have to pay for labor twice. Okay, all this sounds fishy to me. I don't like it when someone says you "probably" need this and then gives me a quote. Please help.
It is easy to test the power brake booster (large vacuum diaphragm behind the master cylinder) - with the engine off, place your foot on the brake pedal.