Nissan 47210-ZC01A Master Vacuum Assembly

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Start the engine and let it run for one or two minutes. Then, depress the brake pedal slowly multiple times. If the pedal depresses less each time, it indicates that the booster is airtight. Additionally, depress the brake pedal while the engine is running and then stop the engine with the pedal depressed. If there is no change in the pedal reserve travel after holding the pedal for 30 seconds, it confirms that the booster is airtight.

Brake inspections are crucial to ensure the proper functioning of the brake system and to identify any potential issues or defects.

Depress the brake pedal multiple times with the engine off and ensure that there is no change in the pedal reserve distance.

When inspecting disc brakes, ensure that there are two pads (an outer and an inner) in each caliper and check their thickness through the inspection window. If the lining material is below the specified thickness, the pads should be replaced. For a more precise measurement or if concerns persist, the pads can be removed, cleaned, and re-measured. The disc thickness should also be checked with a micrometer.