The wipers on my wife's '95 325 are really slow. She mentions that after about 10 minutes to resume operating at normal speed. I won't have a chance to troubleshoot until the weekend. Any suggestions on were to start?
current fleet - 96 328i (the wife's) | 93 525iT | 91 535iM | 85 635Csi
gone but not forgotten - 75 2002 | 77 530i | 79 528i | 86 535i | 95 325is
Could be the linkage that is seized up...
Try spraying tons of WD40 or similar product on the linkage to see if it is getting better.
You might have to change the linkage if it isn't getting better.
Could also be a dying motor...
'85 Euro 635csi Race Turbo, megasquirt, Group A
'92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
'02 Subaru WRX Wagon with STI springs, bigger sway bars