I bought my 04 s60 (48,500 miles)two weeks ago, drove it for a week with no problem, then last week when I was driving home, the car jerked, then the ABS light and another brake light came on, and basically I had no power brakes. I was on the freeway, but was close to an exit so I exited and found a safe spot and got my owner's manual out and it said to restart the car and if the two brake lights go off, I'm fine. So I did that, and then there was a message "Transmission service required" I took it in to the dealership and they replaced the brake control module.

So, 100 miles later the exact same thing happened, I took it in and they said there were nocodes. Told me it was fine.

Anyone seen this before or have any thoughts about what could be going on?

If you lost power brakes, could it be your brake booster gone bad?

I had the exact same thing happen. Twice. Now this second time the deal says I need three new computers. I started another post asking if I am getting screwed by my dealer. They can't seem to figure it out. The first time it was the ABS switch, now, who knows, the dealer sure doesn't.