I have a 2005 Mini Cooper S; while on the way back from a short trip out of town she went into limp mode and the EML and Check engine lights came on. I've done a little research and have narrowed it down to the crank pulley. Does anyone know how much I should expect to pay to have the pulley replaced? I just need a ball park so that I can plan accordingly.

I will say do not replace with an OEM because the same problems can arise. Most people replace with the ATI. If you are handy with tools you can change it yourself there are DIY posts. best price I have seen is Summit.
http://www.summitracing.com/parts/ATI-917992/

Also, try Way.

Thanks for the info.