Symptom: slow clutch engagement in manual transmission models.
For E46, Z4, and X3, please [ CLICK HERE ] for correct part.
A particular example is a "power shift" where the revs hang for a moment before fully engaging.
Replacement of the valve with the no-restriction replacement Unlock Valve in these cars results in very crisp and firm shifts. With the lightweight flywheel, the engagement is so positive and quick that passengers are pushed into the seat with greater force than ever before. Installation is as simple as unscrewing the original lock valve from the slave cylinder line, replacing it with the Unlock Valve, and bleeding the slave hydraulics.
From Pelican of Millersburg, Ohio on 7/30/2016 .