BMW N53
| BMW N53 engine | |
|---|---|
 | |
| Overview | |
| Manufacturer | BMW, Bayerische Motoren Werke AG |
| Production | 2007–2014 |
| Combustion chamber | |
| Configuration | Straight 6 |
| Chronology | |
| Predecessor | BMW N52 |
| Successor | BMW N20, BMW N55 |
The BMW N53 is a straight 6 DOHC piston engine which was produced from 2006 to 2011. It is the final naturally aspirated straight-6 engine produced by BMW, ending a history of continuous production of this engine configuration since 1968. The N53 released in 2006 in the facelifted E60/E61 523i and 525i. Following the introduction of the N20 turbocharged straight-4 engine in 2011, the N53 began to be phased out. The N54 turbocharged straight-6 engine was produced alongside the N53, therefore the N54 took over as the highest performance six-cylinder engine.
Compared with its N52 predecessor which was port-injected, the N53 uses direct injection (consisting of Piëzo-electric injectors directly in the cylinder) with a stratified lean mixture operation.[1] The N53 has variable valve timing on both camshafts(called double vanos by BMW) and a magnesium alloy block.[2] Unlike the N52, the N53 does not contain variable valve lift (called valvetronic by BMW), due to space limitations in the cylinder head.[3][4]
BMW never sold the N53 engine in North American, Australian and Malaysian vehicles, due to the high sulphur content of the fuel available in these markets.[5] These regions continued to use the N52 port-injected naturally-aspirated and N54 direct-injection twin-turbo inline-6 engines for the 2007-2011 model years.
Models
| Engine Code | Displacement | Power | Torque | Bore | Stroke | CR | Year |
|---|---|---|---|---|---|---|---|
| N53B25-U0 | 2,497 cc (152 cu in) | 140 kW (190 hp) @ 6100 rpm | 235 N·m (173 lb·ft) @ 3500-5000 rpm | 82.0 | 78.8 | 12.0 | 2007 |
| N53B30 | 2,996 cc (183 cu in) | 150 kW (200 hp) @ 6700 rpm | 270 N·m (200 lb·ft) @ 1500-4250 rpm | 85.0 | 88.0 | 12.0 | 2010 |
| N53B30-U0 | 160 kW (210 hp) @ 6100 rpm | 270 N·m (200 lb·ft) @ 2400-4200 rpm | 85.0 | 88.0 | 12.0 | 2007 | |
| N53B30 | 200 kW (270 hp) @ 6100 rpm | 310 N·m (230 lb·ft) @ 1600-4250 rpm | 85.0 | 88.0 | 12.0 | 2010 | |
| N53B30-O0 | 200 kW (270 hp) @ 6700 rpm | 320 N·m (240 lb·ft) @ 2750-3000 rpm | 85.0 | 88.0 | 12.0 | 2007 |
N53B25-U0
The 2.5-litre N53B25-U0 is used in the E60/E61 523i [6] and produces 140 kW and 235 Nm.[4]
Applications:
- 2006-2010 E60/E61 523i
N53B30-U0
The E90/E91/E92 325i switched from the 2.5 litre N52 to the 3.0 litre N53B30-U0 in March 2007. Despite the increased displacement, the maximum power remained unchanged at 160 kW.[4]
Applications:
- 2007-2011 E90/E91/E92/E93 325i
- 2006-2010 E60/E61 525i
- 2009-2011 F10/F11 523i
- 2009-2011 F10/F11 528i
N53B30-O0
The N53B30-O0 increased power to 200 kW (270 hp) and torque to 320 N·m (240 lb·ft).[4]
Applications:
- 2007-2011 E90/E91/E92/E93 330i
- 2007-2010 E60/E61 530i
- 2010-2011 F10/F11 530i sedan
See also
References
- ↑ http://metric.or.kr/Common/download/download_file.asp?dpath=thesis&fname=car-j-1906-0082.pdf
- ↑ "BMW N53B25 Engine". mywikimotors.com.
- ↑ "BMW Straight 6 Engine - N Series". BMWInformation.com. Archived from the original on 21 April 2008.
- 1 2 3 4 "Engine specifications for N53 engines". www.bmwheaven.com.
- ↑ "BMW's N52 versus N53 - what are we missing?". paultan.org.
- ↑ "BMW Engine Codes". racingdynamics.com.
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| 4-cylinder petrol | << M10 | M40 | M43 | N40 / N42 | N43 / N45 / N46 >> | ||||||||||||||||||||||||||||||||||||
| M42 | M44 | ||||||||||||||||||||||||||||||||||||||||
| S14 | |||||||||||||||||||||||||||||||||||||||||
| 6-cylinder petrol | << M20 | M50 | M52 | M54 / M56 | N52 | N53 >> | |||||||||||||||||||||||||||||||||||
| N54 | N55 >> | ||||||||||||||||||||||||||||||||||||||||
| S50 / S52 | S54 | ||||||||||||||||||||||||||||||||||||||||
| << M30 | |||||||||||||||||||||||||||||||||||||||||
| << M88 / M90 | S38 | ||||||||||||||||||||||||||||||||||||||||
| M102 | M106 | ||||||||||||||||||||||||||||||||||||||||
| 8-cylinder petrol | M60 | M62 | N62 | N63 >> | |||||||||||||||||||||||||||||||||||||
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| S65 >> | |||||||||||||||||||||||||||||||||||||||||
| 10-cylinder petrol | S85 | ||||||||||||||||||||||||||||||||||||||||
| 12-cylinder petrol | M70 | M73 | N73 | N74 >> | |||||||||||||||||||||||||||||||||||||
| S70 | |||||||||||||||||||||||||||||||||||||||||