BMW issues stop sale of new M5, M6-prepares oil pump failure recall
According to the German high performance enthusiasts at M5post.com, this urgent stop sale order was sent to dealerships around the US on September 21st, instructing them to cease sales of 2013 BMW M5 sedans, 2013 BMW M6 Coupes and 2013 BMW M6 Convertibles due to a potential problem with the engine oil pump. These vehicles are all powered by the new twin turbocharged 4.4L V8 (engine name S63TU) which offers a stated output of 560 horsepower and 502lb-ft of torque – although the actual engine output has been found to be much higher. (Click here for a closer look at the actual dyno results of the 2013 M5)
Unfortunately, BMW has found that this monster boosted V8 in the 2013 M5 and M6 could be fitted with a faulty engine oil pump. The company reportedly discovered the problem during quality control procedures that some of the engine oil pumps were incorrectly manufactured and these faulty oil pumps could have their driveshaft separate from the rotor that drives the oil through the system. Should that happen, the S63TU engine will instantly lose oil pressure. While oil pump failure/ a loss of oil pressure is a sure fire recipe for disaster in any engine, having a high performance twin turbocharged engine run out of oil will quickly bring about catastrophic engine failure. Because of this potential risk of engine failure in the event that the oil pump system fails – BMW has asked that dealerships immediately stop selling these new models.