nissan nv 400 brakes were bled poor brakes hissing sound at brake pedal when lightely press brake pedal sounds like servo is leaking
Hi there - yes, I believe you are correct. Sounds like the diaphragm in the booster has ruptured, and is leaking air (to the engine), resulting in little or no brake pedal effort assist. I recommend a brake booster replacement](https://www.yourmechanic.com/services/hydraulic-brake-booster-replacement) by a mobile, professional mechanic, such as one from YourMechanic, who will come to your location, diagnose this problem, give you an accurate assessment of damage and cost estimate for repairs.
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