BMW N53

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BMW N53 engine
Manufacturer	BMW, Bayerische Motoren Werke AG
Production	2007–
Predecessor	BMW N52
Class	Straight-6

The BMW N53 will be BMW's latest and most modern straight-6 engine, which will debut 2007 in the facelifted 5 series (E60/E61). It is an improvement on the N52 Naturally Aspirated (NA) engine mainly since it has gasoline direct injection technology and can burn stratified. However, it will not contain Valvetronic due to space limitations in the cylinder head.^{[citation needed]}

Specific vehicle models, engine sizes or other details are still sketchy at best. The 2.5 liter has unimproved power 215hp, but enhanced torque, to 199ft-lbs. The 3.0 liter has improved power to 268hp as well as improved torque. The N53 will be BMW's 14th generation production straight six engine.

Unfortunately the N53 engine series will not be sold in Australian and North American models due to the high sulphur content of the fuel available in these markets.^{[citation needed]}

Interestingly, unlike previous engine generations such as the M50 and the M52 which had the 'TU' designation for the updated versions, the N53 was not called 'N52TU' as it more approprietely should have been named as it is an update of the previous N52 engines and not a new generation of engine.