BMW N53
Encyclopedia
The BMW N53 is BMW
's 14th generation production straight 6 engine, released in 2007 in the facelifted BMW 5 Series
(E60/E61
) and the BMW 3 Series
(E90/E91/E92/E93
). It is an improvement on the N52 Naturally Aspirated (NA) engine mainly since it has gasoline direct injection
technology and can burn stratified. However, unlike its predecessor, it does not contain BMW's Valvetronic technology due to space limitations in the cylinder head.BMW does not plan to put the N53 engine for sale in Australian and North American models due to the high sulphur content of the fuel available in these markets.
The N53 makes use of HPI: High Precision Injection or Direct Injection, which consists of Piëzo-electric injectors directly in the cylinder.
The N53B30-O0 has improved maximum power to 272 bhp as well as maximum torque over the N52B30. The N53B30-O0 can be found in the 330i (E90/E91/E92/E93) and 530i (E60/E61).
The 325i (E90/E91/E92) switched from the N52B25-OL (2.5-litre) to the N53B30-U0 (3.0-litre) in September 2007 (March 2007 for the E93). Despite the increased displacement, the maximum power remained unchanged, and maximum torque
has increased just enough to compensate for a longer differential final drive ratio as a result of a shorter useful range (maximum power is given in the N53B30-U0 at only 640 rad/s instead of the 700 rad/s of the older N52B25-OL). The N53B30-U0 can also be found in the present 525i (E60/E61).
The 2.5-litre N53B25-U0 can be found in the present 523i (E60/E61).
U0 subcoded engines seem to be crippled versions of their equivalent displacement O0 versions as they share all internal dimensions and technology.
BMW
Bayerische Motoren Werke AG is a German automobile, motorcycle and engine manufacturing company founded in 1916. It also owns and produces the Mini marque, and is the parent company of Rolls-Royce Motor Cars. BMW produces motorcycles under BMW Motorrad and Husqvarna brands...
's 14th generation production straight 6 engine, released in 2007 in the facelifted BMW 5 Series
BMW 5 Series
The BMW 5 Series is a mid-size / executive car manufactured by BMW since 1972. The car, now in its sixth generation, is sold in sedan and touring body styles....
(E60/E61
BMW E60
The BMW E60 is the BMW 5 Series automobile, replacing the BMW E39 in 2003. It was replaced by the BMW F10 from March 2010. The E60 was available in both sedan and station wagon platforms....
) and the BMW 3 Series
BMW 3 Series
The BMW 3 Series is a compact executive car manufactured by the German automaker BMW since May 1975. Successor to the BMW New Class, it has been produced in five different generations and in no less than five different body styles. It is BMW's best-selling model, accounting for around 30% of the...
(E90/E91/E92/E93
BMW E90
The saloon model was the first model sold of the 5th generation BMW 3 series. Debuting in the US in 2006, the E90 came in two trims, the 325i/xi and 330i/xi models...
). It is an improvement on the N52 Naturally Aspirated (NA) engine mainly since it has gasoline direct injection
Gasoline direct injection
In internal combustion engines, gasoline direct injection , also known as petrol direct injection or direct petrol injection, is a variant of fuel injection employed in modern two-stroke and four-stroke gasoline engines...
technology and can burn stratified. However, unlike its predecessor, it does not contain BMW's Valvetronic technology due to space limitations in the cylinder head.BMW does not plan to put the N53 engine for sale in Australian and North American models due to the high sulphur content of the fuel available in these markets.
The N53 makes use of HPI: High Precision Injection or Direct Injection, which consists of Piëzo-electric injectors directly in the cylinder.
The N53B30-O0 has improved maximum power to 272 bhp as well as maximum torque over the N52B30. The N53B30-O0 can be found in the 330i (E90/E91/E92/E93) and 530i (E60/E61).
The 325i (E90/E91/E92) switched from the N52B25-OL (2.5-litre) to the N53B30-U0 (3.0-litre) in September 2007 (March 2007 for the E93). Despite the increased displacement, the maximum power remained unchanged, and maximum torque
Torque
Torque, moment or moment of force , is the tendency of a force to rotate an object about an axis, fulcrum, or pivot. Just as a force is a push or a pull, a torque can be thought of as a twist....
has increased just enough to compensate for a longer differential final drive ratio as a result of a shorter useful range (maximum power is given in the N53B30-U0 at only 640 rad/s instead of the 700 rad/s of the older N52B25-OL). The N53B30-U0 can also be found in the present 525i (E60/E61).
The 2.5-litre N53B25-U0 can be found in the present 523i (E60/E61).
U0 subcoded engines seem to be crippled versions of their equivalent displacement O0 versions as they share all internal dimensions and technology.
| Engine Code | Displacement | Subcode | Power | Torque | Redline | Year |
|---|---|---|---|---|---|---|
| N53B25 | 2497 cc (152 in³) | U0 | 140 kW Watt The watt is a derived unit of power in the International System of Units , named after the Scottish engineer James Watt . The unit, defined as one joule per second, measures the rate of energy conversion.-Definition:... (190 bhp) @ 640 rad/s Radian per second The radian per second is the SI unit of angular velocity, commonly denoted by the Greek letter ω... (6100 RPM Revolutions per minute Revolutions per minute is a measure of the frequency of a rotation. It annotates the number of full rotations completed in one minute around a fixed axis... ) |
240 Nm Newton metre A newton metre is a unit of torque in the SI system. The symbolic form is N m or N·m, and sometimes hyphenated newton-metre... (177 ft·lbf Foot-pound force The foot-pound force, or simply foot-pound is a unit of work or energy in the Engineering and Gravitational Systems in United States customary and Imperial units of measure. It is the energy transferred on applying a force of 1 pound-force through a displacement of 1 foot... ) @ 365-525 rad/s (3500-5000 RPM) |
680 rad/s (6500 RPM) | 2007 |
| N53B30 | 2996 cc (183 in³) | 160 kW (218 bhp) @ 640 rad/s (6100 RPM) | 270 Nm (200 ft·lbf) @ 250-440 rad/s (2400-4200 RPM) | |||
| O0 | 200 kW (272 bhp) @ 700 rad/s (6700 RPM) | 320 Nm (236 ft·lbf) @ 290-315 rad/s (2750-3000 RPM) | 735 rad/s (7000 RPM) | |||
Applications
- March 2007-Ferbruary 2010 BMW 5 SeriesBMW 5 SeriesThe BMW 5 Series is a mid-size / executive car manufactured by BMW since 1972. The car, now in its sixth generation, is sold in sedan and touring body styles....
(BMW E60BMW E60The BMW E60 is the BMW 5 Series automobile, replacing the BMW E39 in 2003. It was replaced by the BMW F10 from March 2010. The E60 was available in both sedan and station wagon platforms....
/E61): 523i, 525i, 525xi, 530i, 530xi - March 2007–present BMW 3 SeriesBMW 3 SeriesThe BMW 3 Series is a compact executive car manufactured by the German automaker BMW since May 1975. Successor to the BMW New Class, it has been produced in five different generations and in no less than five different body styles. It is BMW's best-selling model, accounting for around 30% of the...
Convertible (BMW E93): 325i, 330i - September 2007–present BMW 3 SeriesBMW 3 SeriesThe BMW 3 Series is a compact executive car manufactured by the German automaker BMW since May 1975. Successor to the BMW New Class, it has been produced in five different generations and in no less than five different body styles. It is BMW's best-selling model, accounting for around 30% of the...
(BMW E90BMW E90The saloon model was the first model sold of the 5th generation BMW 3 series. Debuting in the US in 2006, the E90 came in two trims, the 325i/xi and 330i/xi models...
/E91/E92): 325i, 325xi, 330i, 330xi - January 2009–present (European market) BMW X3BMW X3The BMW X3 is a compact crossover SUV marketed by the German automaker BMW, based on the BMW 3-Series automobile platform, and now in its second generation. BMW designed the X3 in conjunction with Magna Steyr of Graz, Austria — who manufactured all X3s under contract to BMW for the first...
(BMW E83BMW E83The first generation BMW X3 is a compact crossover SUV of the German automaker BMW. Marketed below the E53 and later E70, the X3 was presented at the IAA 2003 and is since January 2004 on the market.-Engines:...
): xDrive30i - January 2009–present (European market) BMW X5BMW X5The BMW X5 is a luxury crossover SUV introduced in 1999 as the first generation E53. It was BMW's first SUV also known as "Four-by-Four" in the UK. It features all-wheel drive which is branded as the "X" drive system and is available with either manual or automatic transmission...
(BMW E70BMW E70The BMW E70 is the development name for the current X5 Sports Activity Vehicle . It replaced the BMW X5 in November 2006. It is manufactured alongside the new, 2008 BMW X6 at BMW's Greer, South Carolina plant in the USA and BMW's facility in Toluca, Mexico.-Design:The new generation BMW X5 is ...
): xDrive30i - March 2010-August 2011 (European market)- BMW 5 seriesBMW 5 SeriesThe BMW 5 Series is a mid-size / executive car manufactured by BMW since 1972. The car, now in its sixth generation, is sold in sedan and touring body styles....
(BMW F10/F11): 523i,528i - August 2011-oresent (European market)- BMW 5 seriesBMW 5 SeriesThe BMW 5 Series is a mid-size / executive car manufactured by BMW since 1972. The car, now in its sixth generation, is sold in sedan and touring body styles....
(BMW F10/F11): 530i