CM246
A worn or leaking master cylinder is one of the more common causes of a slowly sinking brake pedal on early-2000s Honda/Acura platforms, and the XUI1006L is built to correct exactly that.
Construction-wise, the housing is machined with a non-flanged body that locates on the OE support bracket instead of a flange, and it's dimensioned to a 20.64mm bore, a Φ41/80/2-Φ8.7 mounting pattern, and M14 x 1.5, M14 x 1.5 port threads.
On the fitment side, it's confirmed for 2004-2005 Acura TSX, 2003-HONDA ACCORD VII (CL), 2003-HONDA ACCORD VII Tourer (CM), 2002-HONDA ACCORD VII (CM), and Honda CM6 3.0. On the parts-number side, it cross-references to 46101-SDA-A01, 46101-SDD-A01, 46101-SDD-A02, and 46101-SDD-A03 (plus 1 additional OE number). It's also cross-listed under DORMAN part numbers for easier sourcing.