106 gti rear brake problem

Good day everyone.
My car turns to one side when I make a sudden braking while driving, but no problem when I press it slowly, no matter my face, no matter if I do not press the brake to the bottom, my car freezes to the left side, there is no problem in front of them. or it is freezing, freezing, car or going side by side, I'm afraid in the wet weather. Let me brake.

Have the rear brake system checked, especially the limiter.

There may be air in the braking system. Is the ABS working, does the pedal vibration under your foot in sudden braking?

the abs does not activate in the sudden brakes.

If your abs is not working, this is normal god bless, it may even have an accident.

Could it be from abs?

There is a problem with abs ... usually when the car is not activated, the car's chest throws to the right or left. In sudden brakes .. there may be a problem in the abs readers or the abs brain ... take it to a proper service that knows the job.