BMW N45

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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.[1] 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.[2] As per the N42 and N46, the N45 has variable valve timing (called VANOS by BMW).[1] 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.

Models[edit]

Engine Displacement Power Torque Years
N45B16 1,596 cc (97 cu in) 85 kW (114 hp)
@ 6000 rpm
150 N·m (111 lb·ft)
@ 4300 rpm
2004-2011
N45B20S 1,997 cc (122 cu in) 130 kW (174 hp)
@ 7000 rpm
210 N·m (155 lb·ft)
@ 4250 rpm
2006

N45B16[edit]

Applications:

N45B20S[edit]

The N45 was enlarged to 2.0 litres, to homologate the E90 320si for the World Touring Car Championship.[3] The N45 was chosen over the N46, because its lack of variable valve timing allows higher engine speeds.

Applications:

  • 2006 E90 320si (Limited production model)

See also[edit]

References[edit]

  1. ^ a b "Engine specifications for N45 engines". www.bmwheaven.com. Retrieved 3 June 2012. 
  2. ^ "BMW 116i now powered by 2.0L N46 Valvetronic". www.paultan.org. Retrieved 3 June 2012. 
  3. ^ "BMW 320si – A real driver’s car". www.bmwblog.com. Retrieved 14 April 2017.