Check for a vacuum leak under the hood
Check for a bad vacuum brake booster
Check for a bad "Check valve" on the vacuum booster
Bleed the brakes. It sounds like you have air in the system.
Power Steering contains the fluid which is in Disc Brakes(uncompressible liquid).It evaporates it self.
power brakes are more powerful
No, the brakes on a Toyota RAV4 are not the same in the front and rear. The front brakes typically use larger disc brakes designed for greater stopping power, while the rear brakes may be either drum or smaller disc brakes, depending on the model year and trim. This design difference reflects the varying demands of braking forces on the front and rear of the vehicle. Always consult the specific service manual or manufacturer specifications for accurate information.
A toyota aygo is best known for all the features in side of the car like: anti-lock brakes with electronic brake force and a very good power steering.
on some vehicles the brake booster is operated by the power steering system.the booster operates on power steering fluid instead of vacuum like other vehicles.
The power steering pump also provides power for the power brakes.
Front brakes have significantly more stopping power than rear brakes.
The main advantages of an Toyota Cressida include a 6 cylinder G Series of M Series, anti-lock brakes, a power driver's seat, power moon-roof, comfortable and quit ride, rear wheel handling, and gas mileage.
If you have rear drum brakes, you have to adjust your rear brake shoes. That will also give you a better pedal and more stopping power.
Maybe you need to improve your suspension and your vehicle can't handle the power of your brakes.
Still under warranty. This is their problem. Have them check the power brake booster.