I have an issue with my car, I get a pulsating brake pedal from time to time. its weird and scary. I have done my research with the nice search area and i think it might be my abs servo (aluminum block with a black thing attached to it below the air box). Uhm, but I'm just not 100% sure. If anyone reading this has any ideas, please let me know. I have removed my calipers and I'm cleaning them up now, so the system will get new brake fluid and be bled properly. I don't think that either of those have an effect on the issue at hand though.