With the vibrating sound, did you feel it? Most of the time you will feel the abs working through the brake pedal.

Also did you really mean to type 10km/hr? That doesn't seam possible as that is only around 6mph at which speed the anti-lock brakes would be impossible to evoke unless you are on a frozen lake.

 

check the seals on the caliper, mastercylinder and brake booster as well.

you don't have it to happen again.

 

Because of the ABS you should be stopping a lot faster

 

So what was the answer?
Low fluid, air in lines, or both?

 

one thing i've noticed and heard a lot about from others who driven my car is that although the S2000's brakes have a quick initial bite, like any other good sports car such as a Porsche, you really need to stand on the pedal in order to get max braking.

THe pedal has a very firm action, and you need to be forceful with it when calling up max braking.

 

I don't know... With no brake idiot light it's not the reservoir level that's the problem. I'm betting he just hit ABS because of road conditions. You combine that with low temperatures when the tires get hard, and it's not surprising.

Bubbles in the brake lines could make the pedal spongy, but shouldn't have caused shuddering like he described.

Oh, and I love the S2000 brakes.

 

Yeah, I didn't consider his location, and he didn't give any info on environmental or tire conditions, if it was cold and wet (or even icy) and he was on summer tires , he could have just been sliding along with zero traction with the ABS pumping merrily away.
Though if he couldn't recognize this I think he really needs some driver's education or he's headed for (more) trouble.
How about it TaeHwan? was it cold and wet? Could there have been ice or oil on the road? Have you ever hydroplaned a car? (not that you did in this case, 10km is way too slow to hydroplane in any amount of water). I have no intention to offend you, but I think if you have only a little driving experience you should look into taking some courses or joining an autocrossing club or something of that nature. At least get out somewhere SAFE and prectice sliding the car around at the very least.

 

Apparently a common reaction for people who've never experience ABS is to get off the brakes when they start pulsing. That's why I make my wife lock up a new car a couple times so, she can feel what it's supposed to feel like in a panic stop.

 

I know what he said, but I think its more a matter of driver error than road conditions or anything wrong with the car. A lot of what he stated was personal perspective, which is really unreliable. I think he overstated the space in front of him, understated his speed, and just tapped the car in front because of the two, but we'll have to see what the OP says the dealer says when they look at the car for problems.

 

Still want to know if OP really meant 10km/hr as it is hard to believe. Unless the road was covered with ice, stopping should be instantaneous at this speed.