The air conditioning compressor pressurizes or compresses the refrigerant allowing it to circulate and change temperature when pushed through the condenser. These two essential parts of the cooling system work together to produce the desired temperature inside your vehicle. If you are experiencing loud or strange noises, leaks around the ac unit, reduced air coming out or getting warm air instead of cold on your ac system then you may have a problem with your ac compressor unit. The AC Compressor can easily be located on the passenger side of the vehicle underneath the alternator and can be accessed by removing the alternator. Fits the following vehicles: 2003-2007 Accord 2.4L Replaces part numbers: 28003C, 10345430, 10349951, 2041606 This is a compatible replacement part manufactured by AA Ignition. This ac compressor assembly is NOT a genuine OEM part. Vehicle makes and their associated vehicle models and part numbers are used in this listing only to identify the vehicles this ac compressor fits.