Hello, Recently on my car my reverse just stopped engaging all together. Driv on 2001 BMW 325i

Engages and works perfectly. Ive been told its possibly not a whole new transmission needed and maybe a fairly simple fix . Ive also read in this car it is common in those years. I am at a point of trade in or fix car again!! Id rather fix it but wouldnt want to dump over another grand if so

Asked by for the 2001 BMW 325i
U can try to pull codes but I'm banking on reverse clutch is spanked....lotta miles?.