Porsche M48.50 engine
The 4.5-liter turbocharged engine Porsche M48.50 was manufactured by the German company from 2002-2007 and used in the pre-facelift version of the first generation Cayenne crossovers with the 955 body. This engine is known for frequently experiencing cylinder scoring due to weak Alusil coating. The M48 series also includes models: M48.00, M48.01, M48.51, and M48.70.