Question: what is the difference between bmw n42 and n46?
Answer: The BMW N46 is a naturally aspirated four-cylinder petrol engine which replaced the BMW N42 and was produced from 2004 to 2015. The N46 serves as the basis for the smaller BMW N45 engine (which does not have Valvetronic). In 2007, the N46's successor - the BMW N43 - was introduced.