While driving today, I suddenly heard this noise that seemed coming from the rear of the car. It seems like its coming from the left rear of the car, but be sure nor can I be sure it is coming from the tyre. When driving the car feels fine, handling is fine and hard or soft braking is all as normal. It seems to happen when driving in very low speeds while applying the brake softly, and what is strange that it is not continues and it doesn't happen all the time, while one time its louder and another time can barely be heard..... I can't feel any vibration on the wheel or brake pedal, but the passenger on the left front side of the car can feel the nock like its coming from underneath the seat. If I accelerate and brake hard (like emergency stop), at the point when the car stops you can hear this clonk noise and feel like someone just kicked the back of your seat just so ever lightly. But even that does not happen every time.
What could it possibly be ? I'm confused, and don't want to drive the car in case it will get worse. (and the car is only one year old, no tyres changet on it yet).
Can anyone help ?