BMW N45

BMW N45
Overview
Manufacturer	BMW
Production	2004-2011
Combustion chamber
Configuration	straight-4 DOHC
Chronology
Predecessor	BMW N40
Successor	BMW N43

The BMW N45 is a straight-4 DOHC piston engine which replaced the N40 and was produced from 2004-2011. It was produced alongside the N46 and only sold in several countries, where vehicle taxes favoured small displacement engines.

The N45 is based on the N46, however it does not have valvetronic variable valve lift. As per the N42 and N46, the N45 has variable valve timing (called VANOS by BMW). In 2007, the N45 was updated, which was called the N45N.

In 2007, the N45's successor - the N43 - was introduced. However, the direct-injected N43 was not sold in countries with high-sulfur fuel, so the N45 continued to be produced alongside the N43. The N45 was phased out as new generation vehicles were released with the turbocharged N13.

Applications:

The N45 was enlarged to 2.0 litres, to homologate the E90 320si for the World Touring Car Championship. The N45 was chosen over the N46, because its lack of variable valve timing allows higher engine speeds.

Applications:

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