The ABS modulator (hydraulic unit) can leak air into the brake system and cause a low brake pedal. A new ABS modulator will be needed if it is diagnosed to be the source of the leak.
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Most reported 2007 Honda Accord Hybrid problems
The front brake rotors can warp and cause a vibration when braking. The rotors will need to be machined or in cases where they are worn to thin, replaced to correct this issue.
Plugged moon roof drains can cause a water leak inside the car. The water will usually leak onto the driver's or passenger's head when the car turns a corner.
Front compliance (lower control arm ) bushings tend to crack and break requiring replacement.
Some models have shift quality problems when shifting into third gear. A new "third gear set" from Honda will address this issue.