In many cases, during the first generation of BMW, the first generation of ACs are responsible for failure of the primage of the compressor or the bearings of the bearings. Since it is expensive to replace the entire site, you can try to restore the compressor to a more expensive way. To do this, it is usually necessary to purchase a plate (find it hard enough) and bearings and replace them. As a result, the solution is approximately 20 to 100 times cheaper than the purchase of a new compressor.
