4560182AA | Genuine Mopar® Vacuum Power Brake Booster

1. Reduce Pedal Effort

• Without a booster, you must push very hard on the brake pedal to stop the car.

• The vacuum booster amplifies your foot pressure, so braking requires much less effort.

2. Provide Stronger Braking

• By increasing the force applied to the master cylinder, it ensures the brakes generate enough hydraulic pressure to stop the vehicle efficiently.

3. Improve Safety

• Easier braking means you can stop faster in emergencies.

• Less physical effort reduces fatigue during long drives or repeated braking, especially in heavy vehicles.

4. Maintain Smooth and Consistent Braking

• Helps the brakes respond proportionally to your pedal input.

• Prevents abrupt or uneven braking, improving control and comfort.

1. Hard Brake Pedal

• The brake pedal becomes very stiff and requires much more force to stop the car.

• This is the most common and noticeable symptom.

2. Longer Stopping Distance

• Because the booster isn’t amplifying your pedal force, the brakes may not stop the car as quickly.

3. Hissing Noise

• A hissing sound when pressing the brake pedal usually indicates a vacuum leak in the booster.

4. Engine Issues

• Engine may stall or run rough when the brakes are applied if there’s a vacuum leak affecting engine intake.

5. Brake Pedal Moves Slowly

• The pedal may slowly sink to the floor when pressed, showing a loss of booster assist.

6. Illuminated Brake Warning Light

• Some vehicles may turn on the brake system warning light if the booster is failing.