BMW X5 2004 E53 Owner's Manual

21
IHKA Air Flow
The micro filter for the IHKA system is installed in the engine compartment in the center of
the fire wall.
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Warm Air Flow
Stratified Air Flow
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22
Cargo Area
The cargo area of the X5 offers 450 liters/15.9 cuft of space and has a load capacity of 440
pounds. The retractable, removable cargo cover is standard equipment. Storage com-
partments are located on the left and right sides in the rear.
The left side storage compartment contains the NAV
computer when installed and the telephone transceiv-
er and CD changer.
The right side storage compartment
contains the rear power distribution
fuse box as well as the sub-woofer
for the stereo system. Mounted in
front of the right side storage com-
partment are two 12 volt accessory
power sockets.
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23
Cargo Area
The sliding load floor is available as an option on the
X5. It is mounted through two sliding bushing on two
steel rails
The load floor is held in position by the
locking bowden cable mechanism that
latches when closed to prevent the
floor for sliding while the vehicle is
moving. The load floor incorporates a
shear point that will cause the floor to
collapse upward in a rear collision.
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Bowden
Cables
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Cargo Area
The full size spare tire is mounted
below the load floor with the LVA air
supply system for the air springs
located beneath the spare.
The battery is mounted below the LVA
in a molded plastic battery box, along
with the EHC control module and the
PDC control module. If the optional
trailer towing package is installed, the
trailer module is also installed in the
module carrier.
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25
Tailgate
The tailgate on the X5 is two sections that
open up and down. The upper section has a
fixed bonded rear glass that incorporates the
rear window wiper and motor assembly. Two
gas strut pistons are used on the upper sec-
tion for opening. An electric actuator is incor-
porated in the upper section with the micro
switch for operation located between the two
license plate lights. The actuator locks into
the lower tailgate section when closed.
A micro-switch positioned in the center console switch
panel is used to open the tail gate from inside the
vehicle.
Operation of the upper tail gate is con-
trolled from the GM which locks the
operation of the gate when the vehicle
speed is over 5 MPH. A dealer installed
class three trailer hitch is available as an
option with a towing capacity of 6000
pounds.
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26
Tailgate
The lower tailgate section also uses an electric actuator for its operation. The actuator is
positioned in the center of the tailgate and operates two latches though bowden cables.
The latches are positioned on the left and right sides of the tailgate. Two springs are used
to dampen the operation of the lower tailgate section.
Adjustments of the rear tailgate are car-
ried out at the tailgate body latch on the
left and right sides.
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27
Tailgate (Emergency Opening)
Both sections of the tailgate incorporate emergency release mechanisms for opening the
tailgate in the event of electrical or component failures.
The upper tailgate release is a plastic pull tab positioned on the right side of the inner trim
cover. Pulling the release tab will mechanically release the upper actuator.
The lower tailgate emergency release is accessed by removing the trim cover on the tail-
gate section. With the gate closed, only the top section will be able to be loosened. The
mechanical release is actuated by inserting a small screwdriver into the opening and press-
ing the latch to the left.
Emergency Release
Emergency Release

28
Drivetrain
The transfer case, driveshafts, final drives and half shafts make up the drivetrain assembly.
The transfer case is always mounted in the same position on the X5. This applies to other
markets and future models that will utilize different transmissions for different engine con-
figurations. With these models, the transmission tail shafts will be modified to match up with
the transfer case.
The rear driveshaft is a two piece unit using a center bearing, while the front drive shaft is
a single piece that is splined to the transfer case and bolted to the front differential.
The breather vents for both differentials and the transfer case are mounted higher up on the
chassis to prevent water from entering if the vehicle is driven off road through water. The
front breather passes up into the engine compartment and is mounted under the left side
ignition coil cover. The rear breather passes along the under side of the body and is mount-
ed behind the left side wheel arch cover. The breather vent for the transfer case is mount-
ed up high in the driveshaft tunnel.
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29
Drivetrain-Transfer Case
The transfer case is manufactured by New Process Gear Division of New Venture Gear
Company. It is identified as model NV 125.
It incorporates a planetary gear set and chain to provide the torque split and all wheel drive.
The output torque of the transmission is applied to the planetary carrier of the gear set. The
rear drive shaft is connected to the annulus gear and the front drive shaft is connected to
the sun gear through the chain drive.
As the output shaft of the transmission turns, the planetary carrier rotates, causing the
planetary gears to drive the sun gear and annulus gear.
A torque split of 68% rear/ 32% front is provided through the gearing of the planetary set.
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Drivetrain-Final Drives
The final drives for the front and rear axles are conventional differentials. The DSC system
provides anti-spin/slip control for both the front and rear axles on the X5.
The rear differential is the HAG 188K
(compact) unit with a ratio of 3.64 : 1
The front differential is the VAG 174
unit with a ratio of 3.64 : 1.
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