Believe it or not, but only a fraction of the parts that make up your car were manufactured by the automaker. More often than not, specialized manufacturers will design and produce parts that end up being used by the automaker. These companies are known as OE Suppliers, and if you see a part listed that way it means that the part you are ordering was made by the original company that supplied the part when it was new. Reproduction parts are good, but nothing compares to the original equipment part when it comes to bringing your vehicle back to perfect form and functionality. The most famous and ubiquitous OE suppliers include companies like Denso, Continental, and TRW.
Until it stops working, most people will never appreciate how important the A/C compressor is. While all of the parts in the air conditioning system are important, arguably the most important is the compressor, without it you wouldn't have air conditioning. The compressor can fail for many reasons; the most common two are either the actual compressor motor wears out or the clutch stops working. Some compressors will let you change the clutch without replacing the whole compressor, others you have no choice but to replace the entire unit. If you are looking for a replacement, you can depend on OE Supplier A/C compressors.
OEM: 948 126 011 00, Item: 531894
OEM: 64 50 9 182 800, Item: 562478
OEM: 64 52 8 386 650, Item: 519045