The 2004 Toyota Matrix typically has one air conditioning (AC) compressor. This compressor is responsible for circulating the refrigerant in the AC system to cool the air inside the vehicle. If you're referring to the number of bolts securing the compressor to the engine, it usually has three or four bolts, but it's best to consult a repair manual for exact specifications.
The 2005 Toyota Matrix has 16 valves.
The 2013 Toyota Matrix has 16 valves.
The 2008 Toyota Matrix has 16 valves.
The 2003 Toyota Matrix has 16 valves.
The 2006 Toyota Matrix has 16 valves.
The 2010 Toyota Matrix has 16 valves.
The 2009 Toyota Matrix has 16 valves.
The 2004 Toyota Matrix has 16 valves.
The 2011 Toyota Matrix has 16 valves.
The 2012 Toyota Matrix has 16 valves.
The 2007 Toyota Matrix has 16 valves.
The 2004 Toyota Matrix's engine produces 130 hp @ 6000 rpm.