Hello everyone, i have a 2003 g35 coupe with brembo brakes. Recently i noticed some hesitation in my brakes. Ill hit the pedal and it will be rock hard then shudder and drop slightly then grab like normal. My abs, slip and vdc light came on while driving and i heard that could be caused by low fluid. I topped off my fluids and lights dont come on anymore but the pedal issue still remains. Under hard braking it feels like the power brake system is off then suddenly comes back on. Any ideas on what it could be? I was thinking dirty fluid (when i topped it off it looked pretty gnarly) and one of my mechanic friends said my booster may be crapping out...im going to bleed the brakes this weekend and hope thats it but anyone else experience something similar?

 

Sounds like the brake booster, the booster vacuum line or the check valve is/are failing.

 

Have the brakes checked by a pro
Your life and others on the road depend on them
Have the Pads,calipers,rotors, and as mentioned above the brake booster checked and a change of Brake Fluid.
You are aware that you have a fourteen year old vehicle that most likely needs plenty of work

Telcoman