Help! Air conditioner hose, low side, from compressor toward evaporator. Current part number on hose looks to be 1 377 364 (faded though so I can't be sure). Dealership, using my vin #, says part number is 64531381944. Ordered this part a couple of weeks ago. The part has come in and it is obviously not the part I need (too much metal, too little hose)! Anyway, two trips to the dealership (with the car so that they can see the current hose configuration) and all I have succeeded in doing is having grown men look at me perplexed and scratch their heads. As the warm season is coming any help would be greatly appreciated (part number currently on your M5 / knowledge of numbers being changed/updated).