According to the M-obsessed boys and girls at M5Post.com BMW has issued an immediate stop sale on new M5 and M6 (both coupe and convertible) models. The problem stems from the engine oil pump; if the pump doesn't supply the correct amount of oil to the engine's moving parts, "severe engine damage" is the likely result. That's not good at all. BMW is also "contacting customers that have already taken delivery and recommending customers not drive their cars." Sad news for M5 and M6 owners, to be sure, but we think it beats a bunch of blown engines. Check out the official bulletin above and be sure to contact your local dealer if you happen to be lucky enough to own one of the possibly affected machines.