The air conditioner compressor is responsible for both pressurizing the AC system and keeping the refrigerant flowing. It is subject to wear every time the AC is turned on. Just like any other component on a vehicle, it will eventually fail and need to be replaced.
Usually, when a compressor begins to fail it will produce a few warning signs like the AC no longer blowing as cold as it once did, loud noises when the AC is switched on, the compressor clutch not moving or visible leaks from the compressor front.
This is the same unit as supplied by Mazda (Genuine unit)
Suits NB 1998-2004 (May not fit SE TURBO models, please inspect part number on your unit and contact us)