The modern engines available at its launch are in line with the high standards the new
X5 sets itself. At its market launch, the E70 available with the N52B30O1 and
N62B48O1 gasoline engines, representing the best engines in their class.
The engines have been correspondingly adapted for use in the E70.
This Product Information only describes the new features and changes to the already
familiar systems and components. Specifically they are the following:
• N52B30O1 Engine
• N62B48O1 Engine
• Cooling system
• Exhaust system
• Fuel supply system
N52B30O1 Engine
The familiar 6-cylinder in-line engine N52B30O1 is the entry-level engine for the E70.
The N52 was introduced for the first time in 2005 in the E90. At that time, the engine
set new standards with its magnesium crankcase and VALVETRONIC II system.
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E70 Gasoline Engines
Gasoline Engines for E70
The engine underwent minor modifications in September 2006 and is now designated
N52K. With the introduction of the N52K, modifications were made in following areas:
• Cylinder head cover
• Camshafts
• Crankshaft
• Stem diameter of exhaust valves increased to 6 mm instead of 5 mm
• Torsional vibration damper
• Crankcase ventilation
• Hot-film air mass meter (HFM)
• Throttle valve
• Digital motor electronics
The following systems have been adapted on the N52K engine for the E70:
• Intake system
• Belt drive
• Oil pan
Technical Data Comparison
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E70 Gasoline Engines
Specification M54B30 (E53) N52B30O1 (E70)
Engine type
inline 6 inline 6
Displacement (cm
3
)
2979 2996
Stroke/bore (mm)
89.6/84 88.0/85
Power output (kW/bhp)
at engine speed (rpm)
170/231
5900
163/260
6600
Torque (Nm)
at engine speed (rpm)
300
3500
305
2500
Compression ratio
10.2 10.7
Valves/cylinder
4 4
F
uel type (RON)
98 98
Firing order
1-5-3-6-2-4 1-5-3-6-2-4
Engine management (DME)
MS43 MSV80
Emission standard
LEV ULEV II
N62B48O1 Engine
The high-end motorization at the launch of the E70 is the N62B48O1 engine. The N62
engine, which was introduced with the E65 in 2001, was already fitted in the predecessor
X5 E53.
The reengineered version N62TU which was also introduced in the E65 in 2005 is now
also fitted in the new X5.
Changes have been made to the following components for use in the E70:
• Intake system
• Belt drive
• Oil pan
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E70 Gasoline Engines
Technical Data Comparison
8
E70 Gasoline Engines
Specification N62B44 (E53) N62B48O1 (E70)
Engine type
V-8 90 degrees V-8 90 degrees
Displacement (cm
3
)
4398 4799
Stroke/bore (mm)
82.7/92 88.3/93
Power output (kW/bhp)
at engine speed (rpm)
235/320
6100
261/350
6300
Torque (Nm)
at engine speed (rpm)
440
3600
475
3500
Compression ratio
10.0 10.5
Valves/cylinder
4 4
Fuel type (RON)
98 98
Firing order
1-5-4-8-6-3-7-2 1-5-4-8-6-3-7-2
Engine management (DME)
ME9.2 with VVT ME9.2.3 with VVT
Emission standard
LEV ULEV II
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E70 Gasoline Engines
NOTES
PAGE
N52B30O1 Engine Features
The N52B30O1 engine was introduced in the E92 in September 2006. The engine has
been adapted for use in the E70. The changes and modifications to the N52K compared
to the N52 and the components specific to the E70 are described in the following.
Cylinder Head Cover
The cylinder head cover on the N52K is made from plastic therefore steel bolts are used
for the threaded connections. The ground connection of the ignition coils is made by
means of two stud bolts that are connected to the cylinder head.
The crankcase ventilation is now integrated in the cylinder head cover together with the
oil separator.
Oil Pan
The geometry of the cast aluminum oil pan has been correspondingly adapted to suit the
space conditions in the E70.
Crankshaft
The crankshaft has a higher degree of balance (92 % instead of 83 %) in order to reduce
the load on the engine-gearbox system.
Torsional Vibration Damper
The design layout of the torsional vibration damper is adapted to the crankshaft. In view
of the higher degree of crankshaft compensation, the first order vibrations are shifted into
a higher frequency range. The frequency range in which the torsional vibration damper is
effective has been correspondingly adapted.
The torsional vibration damper is designed as a composite damper. This means the
rubber layer that connects the masses is not vulcanized but rather takes the form of a
rubber band.
New bolts are used for mounting the torsional vibration damper. The tightening instruc-
tions have been changed accordingly. Mixing up the bolts can result in damage to the
belt drive.
Belt Driv
e
The basic belt drive has been adopted from the N52B30O1 engine in the E92. This belt
drive is a single belt system and consists of a ribbed V-belt with six V-ribs. Due to the
higher load, the belt drive is designed as a double belt system if the E70 is equipped with
at least one of the following options:
• Active steering system
•
Adaptive drive
• 220 A generator
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E70 Gasoline Engines
The main drive belt with seven V-ribs drives the power steering pump and generator.
An ELAST drive belt with four V-ribs provides the secondary drive for the A/C compressor.
In this case, the A/C compressor is correspondingly adapted to the modified belt drive.
Only fit the ELAST drive belt for the A/C compressor with the special tool specifically
provided for this purpose. Otherwise there is a risk of damage to the belt and the belt
pulley.
Camshafts
In contrast to the N52, a lightweight construction intake camshaft produced in an internal
high-pressure forming process is also fitted on the N52K. To date, this type of camshaft
was used on the N52 only for the exhaust camshaft.
F
or
production r
easons, cast camshafts can also be installed at the production plant.
For this reason, the engine can be fitted with any feasible combination of cast and
lightweight construction camshafts.
Valves
The stem diameter of the exhaust valves has been increased from 5 mm to 6 mm.
11
E70 Gasoline Engines
Index Explanation Index Explanation
A
Basic belt drive
4
Power steering pump
B
Double belt drive
5
Ribbed V-belt
1
Tensioning pulley
6
Torsional vibration damper
2
Generator
7
A/C compressor
3
Deflection pulley
8
ELAST drive belt for A/C compressor
Oil Supply
Electronic oil level measurement An oil quality-level-temperature sensor (QLT) is used for
the purpose of measuring the oil level in the N52B30O1 in the E70.
Although the QLT is a new component, it has the same functions as the previous sensor.
The QLT is longer to match the geometry of the oil pan in the E70.
Intake Air Control
For the first time at BMW, the intake air silencer is a fixed part of the engine. The unfil-
tered air duct is crash-optimized. An unfiltered air resonator and a double-chamber
filtered air resonator are used for the purpose of achieving the required sound quality.
12
E70 Gasoline Engines
Index Explanation Index Explanation
1
Hot-film air mass meter
6
Unfiltered air pipe
2
Filt
ered air pipe
7
Int
ake silencer
3
Double chamber
ed filtered air resonator
8
Air
cleaner
4
Bracket
9
Intake silencer cover
5
Unfilt
ered air resonator
Hot-film Air Mass Meter (HFM)
A digital hot-film air mass meter (HFM) is used in connection with the N52B30O1 engine
in the E70. This HFM is accommodated in the cover of the intake silencer.
Throttle Valve
The N52K is equipped with a new throttle valve. The throttle valve setting is now
measured in a contactless system by means of two redundant magnetoresistive sensors.
These sensors exhibit an extremely high degree of measuring accuracy. The magnetore-
sistive sensor is already known as the eccentric shaft sensor in the VALVETRONIC
system.
Compared to the potentiometers in the predecessor models, these sensors in the throttle
valve permit 100 times the power level. This power ensures reliable signal transfer to the
DME. The sensors are also non-wearing.
The signal is output in analog form by one sensor in the range from 0.3 to 4.6 V and
inverted by the other sensor from 4.6 to 0.3 V. By forming the differential value, the DME
evaluates the plausibility of the signal.
A new plug connector ensures the greatest possible contact quality. In this connector, the
contact force that acts on the pins is decoupled from the plug-in force. In this way, it has
been possible to increase the contact force by 10 times of that of a conventional plug
connector.
Note: The connector for the throttle valve can be plugged on twisted over the
first few millimeters. The connector may then be damaged if an attempt
is made to plug it in with force.
Engine Electronics (N52KP)
Digital Motor Electronics
The engine management MSV80 is used in connection with the N52K. This system is a
further development of the MSV70 and several details have been adapted accordingly.
The MSV80 now has a modified connection for the digital HFM as it requires one less
pin. The connection of the throttle valve sensors has a lower input resistance.
This facilitates the higher current for the magnetoresistive resistors.
The relay for the power supply to the fuel injectors in no longer required on the
N52B30O1 in the E70. The power is now supplied via terminal 87.
Generator
The basic generator for the M52B30O1 engine is the Bosch M2.5 with a rating of 180 A.
The Valeo TG23 at 220 A is used for equipment variants that have a higher power
consumption.
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E70 Gasoline Engines
MSV80 Overview
14
E70 Gasoline Engines
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