Porsche 911 (997) Engine Numbers (All Years)

Porsche 911 (997) Engine Codes

In 2005, Porsche went from the 996 generation of the 911 to the 997 generation. Now while they did carry over the M96 power plant for the base Carrera, they actually offered a newer, redesigned version of the M96 engine in the Carrera S called the M97. The biggest change for this engine was the bump in displacement to 3.8L which was accomplished by increasing the bore size and fitting bigger pistons. This engine also had a decent power increase, taking the horsepower rating to about 355 BHP. The M97 engine would be the power plant for the Carrera S up until 2009 when Porsche came out with the 9A1 which would be the new direct injection engine to power the Carreras. Unfortunately, the M97 has been reported to have similar IMS issues, and while not as frequent, you do have to disassemble the entire engine to replace the bearing instead of just a simple retrofit like the M96. All problems aside, the M97 is a much different power plant than the M96.