The spurious part from 2018 cost just £18 and is made from cast aluminium. You can see it’s poorly made compared to the OEM part, which is made of high-quality plastic. The Febi part was £57 still in 2024, but you can clearly see the improvement in build-quality. For such a critical part as the slave-cylinder it’s worth just paying the extra and avoid having to redo a messy, fiddly job!
As you can see, the cast-alloy slave-cylinder does not have the same look of build quality that the OEM plastic one does. It lasted 5 years and only about 25k miles, but was still good value for the price!
*GUIDE: Clutch Slave-cylinder replacement and bleeding guide for E30 / E28 / early E34 and E34*