The Infiniti M lineup was thoroughly made over for 2011, with new technology and new engines packing more power and resulting in better fuel economy. As you could surely assume, all those improvements came at a cost, and Infiniti passed along some of the pain to customers. For example, the starting price of M56 variants were edged higher by $5,750 compared to the outgoing M45 and M45x. The price spike apparently wasn't enough money, though, as Infiniti has again upped the MSRP of all 2011 M models.
Effective immediately, the M56 and M56x are up by another $350, with a sticker price of $58,775 and $61,275, respectively. The M37 and M37x received a $250 bump, with a new starting price of $46,500 and $48,650, respectively. We're not exactly sure why the price of the M jumped, but it could have something to do with the fact that sales of the flagship Infiniti are up 45 percent on the year, with August 2010 sales more than doubling compared to the same month in 2009. Not a bad problem to have.