Honda Civic Si Clutch Slave Cylinder 46930-S6M-003

This is an external clutch slave cylinder that replaces Honda part number 46930-S6M-003. It bolts to the outside of the transmission case and pushes the clutch fork, so it can be changed without pulling the transmission.

Listed fitment: 2006-2015 Honda Civic, 2008-2012 Honda Accord, 2005-2006 Acura RSX, 2009-2014 Acura TSX and 2013-2015 Acura ILX with a manual transmission. Check that the old unit is stamped or tagged 46930-S6M-003 before ordering.

On the K-series cars a slave that is starting to leak shows up as a wet boot and fluid on the transmission case under it, and the clutch starts engaging right at the top of the pedal or stops releasing when hot. A lot of these get changed because the pedal keeps going soft even after the system has been bled several times.

Signs the clutch hydraulics are failing: the pedal sinks slowly to the floor or stays down, the pedal feels soft or spongy, the reservoir level keeps dropping, fluid is wet on the firewall or the bottom of the bellhousing, or it grinds going into gear because the clutch no longer releases all the way. If bleeding brings the pedal back for a day and then it goes soft again, a seal is leaking and the part needs replacing, not more bleeding.

To install, crack the line fitting at the old slave, remove the two mounting bolts and set the new one in with the pushrod seated in the fork. Tighten the line, then bleed at the slave bleeder until no air comes out and the pedal is firm.