Nissan Sentra brake pedal becomes hard to push and causes engine to race, resulting in jerking forward on Nissan Sentra

Some Nissan Sentra owners report experiencing a hard-to-push brake pedal that causes the engine to race and results in jerking forward. This issue may stem from brake booster failure, where a damaged power brake booster compromises the ability to depress the brake pedal effectively. Additionally, hydraulic system problems, such as pressure restrictions due to kinked brake lines or faulty components, can contribute to a stiff brake pedal. Furthermore, issues with the vacuum system can prevent the brake pedal from responding properly, leading to difficulties in braking. To address these concerns, owners are advised to check the brake booster for damage, inspect the hydraulic system for leaks or malfunctions, and ensure the vacuum system is functioning correctly. If these measures do not resolve the problem, consulting a qualified mechanic is recommended for further diagnosis and repair.