Experiencing a "spinning noise" underneath in the middle of the car,,,

Please let me know if you are open on Saturday and how long this might take to diagnose - I am in the Clear Lake area.

Just making sure - is this safe for a BMW? Most dealers tell you do NOT add anything non BMW - this could be to make money but just doublechecking,,,don't want them to then tell me I need a new transmission because I used this product.....I have a reputable mechanic but he doesn't have a diagnostic computer. The mechanic with the computer told me it was the battery, so I replaced that yesterday but nothing has changed.

I would *****NOT***** put ANYTHING in the transmission right now. Until its properly diagnosed, you're just shooting in the dark. We are open M-F 8-6, and honestly- If you have a reputable mechanic but doesn't have a scanner for this car, its not a reputable mechanic.

Thanks!!! I cannot take time off to drive up there and it's an hour North of me. Other than a BMW dealership out here, any suggestions? I have tried several places over the last thrre years since I moved here from Los Angeles but have yet to find someone who isn't shooting in the dark everytime I take it in,,,those shots are getting expensive! Just need the car for the next year til 2016 models come out!