2014 Ford Focus Brake Booster & Master Cylinder Replacement

This 2014 Ford Focus SE 2.0L was making a hissing sound from under the dashboard. There was also a check engine light with code P0171 that showed up 1 day following the initial observation of the hissing sound. The most likely culprit when encountering this is a bad brake booster. This video shows steps along the way of doing a replacement of the brake booster and brake master cylinder for this vehicle. This isn't intended as a step by step guide, but rather as a way to prepare yourself for what you may encounter while doing this repair. Below are links to other videos that may be helpful to complete this job.
How to remove battery box from this vehicle:
• FORD FOCUS MK3 BATTERY...
How to bench bleed master cylinder:
• AutoZone Car Care: How...
How to remove brake booster, in general:
• How To: Replace Your P...
How to bleed brakes (highly recommend 2 person method, 1 person method with a vacuum pump did not work for me with how much air was in the line):
• How to Bleed Brakes - ...
How to bleed ABS system:
• How to Bleed an ABS Br...

[@jellybean1976928]

The barbs on the brake booster pin can be pushed in by placing a socket over them and then levering put from the other side.

[@samueldegrey7718]

Very informative and helpful

[@Rlzee]

Thank you!

[@Papa_Lugnut]

No prob!

[@stevenlach3303]

Do you know if this is the same for the Fusion same year?

[@Papa_Lugnut]

Honestly not sure. If it isn't identical it's probably very similar!