[ChillyRank]

I bought a used nissan rogue a couple months ago and for some reason the brakes don't work as good as how the brakes on a rav4 work if that makes sense. My family members all have toyota rav4s and the brakes work amazing. You can press the brake down a tiny bit and the whole car will stop perfectly. My car on the other hand, you press the pedal all the way down, hold it down, and it still doesn't stop on time. You either have to continuously press it down/pump it down like 1, 2, 3 so the pedal can get harder therefore having a higher chance of stopping the car or pray you don't get into an accident. This doesn't happen though when the car is off. To turn on the car, you need to push down on the brake pedal and then press the start button. When you press down on the pedal whilst it's off, it's harder than a brick(it should be working that way when you're driving on the road), but after you turn it on, you're screwed. My dad made me turn the wheel all the way to the left and right whilst i press down on the brake as he, I suppose, takes air out of the lines/bleeds the breaks on all 4 sides but it still doesn't work. Could it be the brake master cylinder or the whole abs system?

 

[VStar650CL]

Vacuum boosters always go brick hard when the engine is off for awhile, simply because the vacuum is gone. That's true for any vacuum-boosted brake system, not just Nissans. So it really doesn't mean much, the only thing it tells you is that the Master Cylinder isn't bypassing and there's little or no air in the hydraulics. Your problem sounds like a bad booster, with a small-to-middling hole in the vacuum diaphragm which is preventing it from working at full power.

 

[PowerslavePA]

I have a 2016, and it stops better than my Camaro, and Mustang do.
I am used to putting more pressure on the brake with those cars. So,
when I applied the brake on my Rogue, I came to an abrupt stop...

You can also have ovaled piston bores in the master cylinder, which is why
you have to pump a few times.

You can have a bad check valve in the vacuum line to the booster, so have
that checked. If that does not function, vacuum will leak past the valve.
The brake pedal will still go hard when the car is off.

I would bleed the brakes first, so be sure there is no air in the lines. If after
you bleed the brakes, you still have weak braking, test the check valve. You
remove the hose with the check valve, and you should only be able to blow
air through it in one direction.

Check the small stuff before replacing the master cylinder or booster.

 

[Svtrit]

I agree, bleed the brakes first. it may be that simple a fix.