What is the reason for the Nissan Sunny's brake being hard to press?
1 Answers
Nissan Sunny's brake being hard to press is due to: failure of the vacuum booster pump, issues with the brake booster pump. Vacuum booster pump failure: If the car's vacuum booster pump leaks or fails, the force applied to the brake pedal is amplified by the brake booster pump. If the vacuum booster pump fails, the brake loses its power assist, making it very hard to press. Brake booster pump: Pressing the brake after the engine is turned off is also related to the brake booster pump. The brake booster pump continuously generates vacuum only when the engine is running. When the engine is off, it relies on the remaining vacuum assist, which will be restored after starting the engine, and is not a malfunction.