A potentially faulty engine oil pump has forced BMW to issue an official "stop sale" to its dealers, a move that will ground two of its highest-performance models. The automaker's customer relations department is also contacting owners of already delivered models to ask them to stop driving their vehicles until a recall can be performed.Â
The stop sale affects the 2013 BMW M5 and M6 coupe and convertible, two models that recently went on sale in the United States. About 700 M5s and M6s in the U.S. are affected.Â
According to a BMW service bulletin released on the automaker's DCSnet dealer network, the problematic pump could experience "a sudden loss of oil pressure which will result in severe engine damage." If the vehicle's oil pressure drops rapidly, BMW says that an indicator will be displayed on its instrument cluster.Â
Both the M5 and M6 use BMW's S63TU engine, a 4.4-liter V8 engine specifically designed for the company's M-badged products.
BMW will replace the incorrectly manufactured oil pump under the recall.Â
A list of affected vehicle identification numbers (VINs) has been posted on M5post.com. The recalled vehicles were built between July and September of 2012.Â
