2004 BMW Z4 2.5I fuel

Everything under control
50 4.Press button 1 repeatedly until the
required minutes are set
5.Press button 2 to confirm the settings.
The set time of day is transferred to the car
radio display or appears in the instrument
cluster display.
Display mode
In ignition key position 0:
Press button 1.
The time of day is displayed for several
seconds.
Computer*
Mode selection
With the ignition key in position 1 or higher,
you can use the button in the turn signal
lever to retrieve information from the com-
puter for display in the instrument cluster.
Every time you press the button briefly in
the direction of the steering column, a new
function is called up for display.
The displays appear in the following order:
time of day, outside temperature, average
fuel consumption, cruising range, average
vehicle speed.
With the ignition key in position 1 or higher,
the last active setting is displayed.
If you wish, you can have all the dis-
plays of the following functions
shown in another unit of measure.<
Outside temperature
To change the units of measure,
°F/°C
While the temperature display is active,
keep the button in the turn signal lever
pressed until the display changes.
Ice warning
If the outside temperature drops to approx.
37.57/36, the computer automatically
switches to the outside temperature dis-
play.
In addition, a signal sounds and the display
flashes for a brief period.
Clock
Setting the 12-hour or 24-hour
mode*
If the vehicle is equipped with a computer,
you can have the time displayed in either a
12-hour or 24-hour mode.
While the time display is active, press the
computer button in the turn signal lever
until the display changes.

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Mobility
51
Average fuel consumption
If you continue to press the button on the
turn signal lever, the average fuel con-
sumption last displayed is recalculated
from that point in time.
Any time spent when the vehicle is station-
ary and the engine shut off is ignored in the
calculation.
Cruising range
The computer bases its calculations of the
cruising range on the preceding driving
style and on the remaining fuel in the tank.
It is important that you refuel when
the cruising range falls below approx.
30 miles/50 km. Otherwise, the engine
cannot be guaranteed to operate properly
and damage may result.<
Average speed
If you continue to press the button on the
turn signal lever, the average fuel con-
sumption last displayed is recalculated
from that point in time.

Mobility
To ensure that you stay mobile,
the following chapter provides you with
important information on fuels and fluids,
tires and wheels, maintenance procedures
and steps to take in the event of a break-
down.

Refueling
74
Refueling
Fuel filler door
1.Open fuel filler door
2.Turn the gas cap in a counter-clockwise
direction
3.Place the gas cap in the bracket on the
filler door.
Releasing manually
If an electrical malfunction occurs, you can
unlock the fuel filler door manually:
1.Remove the covers of the tail lamps by
turning the lock to the right; refer also to
page 90
2.Pull the luggage compartment trim
panel slightly toward the interior.
The green button with the fuel pump
symbol is revealed
3.Undo the adhesive strip and pull off
4.Pull the button
The fuel filler door is released.
Pull on the button slowly and
carefully as it could otherwise be
torn off.<
Fuel gas cap
Close the gas cap carefully after refuel-
ing until a click is heard. While closing,
be sure not to squeeze the strap which is fas-
tened to the cap. A loose or missing cap will
activate the CHECK GAS CAP lamp
*.<
Check Gas Cap
*
This indicator lamp comes on when
the gas cap is loose or missing.
Close the gas cap tightly as described
above.
Tank capacity: approx. 14.5 gallons/
55 liters, of which approx. 2.1 gallons/
8 liters are reserve capacity.
Simple and environmentally friendly
When handling fuels, comply with all
of the applicable safety precautions
posted at the service station.<
When refueling, insert the filler nozzle com-
pletely into the filler pipe. Lifting the nozzle
during refueling
>results in premature shutoff
>and will reduce the effect of the vapor
recovery system on the pump.
The fuel tank is full when the filler nozzle
shuts off the first time.
Fill the fuel tank before it is com-
pletely empty. Driving to the last drop
of fuel can prevent the engine from operat-
ing properly and result in damage.<
Fuel specifications
The engine uses lead-free gasoline only.
Required fuel:
>Premium Unleaded Gasoline,
min. 91 AKI.
AKI = Anti Knock Index
Do not use leaded fuels. The use of
leaded fuels will cause permanent
damage to the system's oxygen sensor and
the catalytic converter.<

Reference
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Mobility
79
Wheel and tire replacement
Unprofessional attempts by laymen to
service tires can lead to damage and
accidents.
Have this work performed by skilled pro-
fessionals only. Any BMW center has the
required technical knowledge and the
proper equipment and will be happy to
assist you.<
The correct wheel and tire combination
also affects various systems that would
otherwise be impaired, for example ABS or
DSC.
Have the wheels balanced after each tire or
wheel replacement.
BMW advises against using retreaded
tires, since driving safety may be
impaired. This is due to possible variations
in casing structures and, in some cases, to
their extreme age, factors which can lead
to a decrease in their durability.<
The correct wheels and tires
BMW recommends using only wheels
and tires that have been tested and
approved by BMW for your particular vehi-
cle model, as otherwise body contact and
serious accidents can result despite the
use of the same nominal size, e.g. due to
manufacturing tolerances. If non-approved
wheels and tires are used, BMW cannot
evaluate their suitability, and therefore can-
not be held liable for driving safety.<
To maintain good handling and vehicle
response, use only tires of a single brand
and tread configuration. In the event of a
flat tire, remount the previous wheel and
tire combination as soon as possible.
Recommended tire sizes and brands
BMW tests certain tire brands for each tire
size, classifies them as road-safe and
approves them. You can best find out
about these at a specialized shop, particu-
larly your BMW center. Observe any coun-
try-specific regulations, e.g. on making a
corresponding entry in the vehicle docu-
ments.The factory-approved radial-ply tires are
matched to your vehicle and have been
selected to provide optimum safety and
driving comfort when used properly.
Run Flat tires fitted
Use only Run Flat tires, since no spare
wheel is available in the event of a flat.
Special characteristics of winter
tires
BMW recommends the use of winter tires
for operation under winter road conditions.
While all-season tires, with M+S designa-
tion, provide better winter traction than
summer tires, they generally do not achieve
the full performance of winter tires.
For mounting winter tires, refer to the
descriptions under Tire condition and
Wheel and tire replacement, pages 78, 79.
Run Flat tires fitted
Use only winter Run Flat tires, since no
spare wheel is available in the event of a
flat.
Observing speed ratings
Never exceed the maximum speed for
which the winter tires are rated.
Unprofessional attempts by laymen to ser-
vice tires can lead to damage and acci-
dents. Have this work performed by skilled
professionals only. The technicans at your
BMW center will be glad to assist you with
the required professional knowledge and
specialized equipment.<
Storage
Store tires in a cool, dry place, protecting
them against light whenever possible. Pro-
tect the tires from contact with oil, grease
and fuel. Do not exceed the maximum tire
inflation pressures specified on the tire
sidewall.

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83
Washer fluids for washer
systems
Headlamp* and windshield washer
system
Capacity of windshield washer system:
approx. 3.2 quarts/3 liters.
Capacity when equipped with headlamp
washer system: approx. 5.3 quarts/5 liters.
Fill with water and, if required, with an anti-
freeze agent according to the manufac-
turer's recommendations.
We recommend that you mix the
washer fluid before adding it to the
reservoir.<
Antifreeze agents for the washing
systems are highly flammable. For
this reason, keep them away from sources
of flame and store them only in their original
containers. Store them so that they are
inaccessible to children. Comply with the
instructions on the containers.<
Engine oil
Engine oil pressure
The indicator lamp lights up in red:
Stop the vehicle immediately and
switch off the engine. Check the
engine oil level and top off as required. If
the oil level is correct, please contact the
nearest BMW center.
Do not continue driving, as the engine
could sustain serious damage from
inadequate lubrication.<
Engine oil level
The indicator lamp lights up in yel-
low while driving:
The oil level is at the absolute mini-
mum; refill as soon as possible. Do not
drive more than 30 miles/50 km before
refilling.
The indicator lamp lights up in yel-
low after the engine has been
switched off:
Add engine oil at the earliest opportunity,
when you stop to refuel.
Engine oil sensor
The indicator lamp lights up in yel-
low within 20 seconds after the
engine is started:
The oil level sensor is defective. Please
have it checked by a BMW center.
Checking the oil level
1.Park the vehicle on a level surface
2.Switch the engine off after it has
reached normal operating temperature
3.After approx. 5 minutes, pull the dip-
stick out and wipe it off with a clean lint-
free cloth, paper towel, or similar mate-
rial
4.Carefully push the dipstick all the way
into the guide tube and pull it out again
5.The oil level should be between the two
marks on the dipstick
6.Return the dipstick to the guide tube,
inserting it as far as it will go.
As with fuel economy, oil consumption is
directly influenced by your driving style and
vehicle operating conditions.

Technical data
100
Technical data
Engine data
Z4 2.5iZ4 3.0i
Displacement
Number of cylinderscu in/cmµ152.1/2,494
6181.7/2,979
6
Maximum power output
at engine speedhp/kW
rpm184/141
6,000225/170
5,900
Maximum torque
at engine speedlb ft/Nm
rpm181/245
3,500221/300
3,500
Compression ratioε10.5 10.2
Stroke
Borein/mm
in/mm2.95/75
3.31/843.53/89.6
3.31/84
Fuel-injection system Digital electronic engine-management system DME

Reference
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103
Capacities
Notes
Fuel tank
reserve gal./liters
gal./litersapprox. 14.5/55
approx. 2.1/8Fuel specifications:
page 74
Windshield washer system/
Headlamp washer systemquarts/liters
quarts/litersapprox. 3.2/3
approx. 5.3/5For details: page 83
Cooling system including heat-
ing circuit
with manual transm. or SMG
with automatic transmissionquarts/liters
quarts/liters8.8/8.3
9.3/8.8For details: page 84
Engine with oil filter renewal quarts/liters 6.9/6.5 For details: page 84
Manual transmission, SMG,
automatic transmission and
differential quarts/liters –Lifetime lubricant, no oil
change required