320i Error Codes 47, 20, 34, 51 and 2

Here’s one, why on earth would you listen to a tech who tells you he’d get you a transmission the only trouble is that it is generating five error codes instead of just one. And, the one that is being raised by the diagnostic scanner — 46 — points to one of the solenoids which is a fairly quick and inexpensive (for the transmission). The shift solenoids are located either on the valve body or inside of it. Yes, getting to those inside does require a teardown of the transmission before you can insert a new solenoid. However, I think that when you look at the $700 or so bill you would receive to replace the solenoid versus the $3,400 bill you would receive to replace your current transmission with a rebuilt that it makes far more sense to invest in fixing the first transmission.

That’s my thinking anyway.

By the way, I would honestly be wary of a supposed tranny expert who finds you a transmission with more problems than your original had and then having the same expert telling you to find a rebuilt to fix the problem.

Please note that BMW service rates are among the highest in the business so be sure you can find out if your local dealership can do the work at an agreeable and affordable price.