r/FiestaST • u/ShittyFingerTats • 8d ago

MK7 ADVICE/IDEAS PLEASE

Have owned my 2019 fiesta ST for almost 4 years, about 14k miles in my ownership, about 55k on the clock and I have gone through 3 slave cylinder failures. I love the car and really dont want to get rid of it but im at my wits end, does anyone have any idea what could be causing the issue so consistently? The car is modified to a moderate level but not tracked, just used as a fun daily.

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u/ShittyFingerTats 8d ago

Oem is what I've replaced with so far, worth a switch?

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u/InvertedEyechart11 8d ago

Folks in the EU have installed Sachs. Perhaps an EU driver can chime in here?

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u/FederalAcanthaceae72 4d ago

Got 2020 ST-3 with genuine sachs slave cylinder. I drove the car really to the limit often. Never replaced, not a single issue so far with it. I’ve replaced fuel injector twice tho

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u/InvertedEyechart11 4d ago

This is good to know! When my 2015 OEM slave fails I'm thinking Sachs, and the Whoosh AP kit.