Review on Beck Arnley 072 9707 Master Cylinder by Julian Davidson

I'm having trouble braking my 2000 Toyota Sienna with 155,000 miles. After idling for a while or at other unpredictable times, the pedal would sink closer to the floor than usual. When you step on the pedal it works perfectly again, but who needs unreliable brakes? I checked the brake lines which weren't leaking and I wasn't losing any fluid so it seemed to be something internal (brake master cylinder). After a few youtube videos I was ready for this task and it was pretty easy. This item was accurate and I used it for about a month and the brakes were like new. Be sure to buy a 10mm linear wrench! I can't say anything about the durability yet, but so far it makes a good impression.