BMW X5: Engine (N62TU V8)

 Emissions Management

The N54 and N52KP meet ULEV II requirements for 2007. There are not many changes to the emission systems on these engines. The N54 engine has 2 underbody catalysts in addition to the "near engine" catalysts already in use from the N52. The N51 engine, however, is a SULEV II compliant engine which

 Air Intake Ducting

With regard to the N54 engine, the air intake ducting plays a significant role due to the requirements of a turbocharged engine. In principle, the energy of the escaping exhaust gases is utilized to "pre-compress" the inducted fresh air and thus introduce a greater air mass into the engine. This