engine BMW Z4 2.5I 2004 Owner's Guide

Reference
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Mobility
87
Laws and regulations
California Proposition 65
warning
California laws require us to state the fol-
lowing warning:
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the interior
furnishings in a vehicle, contain or emit
chemicals known to the State of California
to cause cancer and birth defects and
reproductive harm. In addition, certain flu-
ids contained in vehicles and certain prod-
ucts of component wear contain or emit
chemicals known to the State of CA to
cause cancer and birth defects or other
reproductive harm. Battery posts, terminals
and related accessories contain lead and
lead compounds. Wash your hands after
handling. Used engine oil contains chemi-
cals that have caused cancer in laboratory
animals. Always protect your skin by wash-
ing thoroughly with soap and water.<
OBD interface socket
The Onboard Diagnostic OBD interface
socket is located on the left of the driver's
side under the instrument panel and under
a cover.
The cover has the letters OBD on it.
The purpose of the OBD system is to
ensure proper operation of the emission
control system for the vehicle's lifetime. The system monitors emission-related
components and system for deterioration
and malfunction.
If the Service Engine Soon indicator
lamp comes on either continuously
or intermittently, this indicates a
fault in the emissions-related electronic
systems. Although the vehicle remains
operational, you should have the systems
checked by your BMW center at the earli-
est possible opportunity.
The illuminated indicator informs you of the
need for service, not that you need to stop
the vehicle. However, the systems should
be checked by your BMW center at the
next opportunity.
If the indicator blinks or flashes, this indi-
cates a high level of engine misfire. Reduce
speed and contact the nearest BMW center
immediately. Severe engine misfiring over
even a short period of time can seriously
damage emission control system compo-
nents, especially the catalytic converter.
Service Engine Soon warning lamp
for Canadian models.
If the gas cap is not on tight enough,
the OBD system can detect leaking
vapor and the indicator will light up. If the
gas cap is then tightened, the indicator will
usually go out after a short period of time.<

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1.Open the caps with a suitable object,
e.g. a coin or screwdriver
2.Fold up the protective cover in the
wheel well.
Headlamp cover
1.Pull the wire clamp out straight
2.Pull the wire clamp past the catches,
see arrows, and fold it down
3.Flip the headlamp cover open and
remove.
Reinstall the headlamp cover care-
fully. If it is not on tight, the headlamp
installation could be damaged.<
Reinstall the headlamp cover in reverse
order.
Low beams and high beams
Left side of engine compartment:
1Low beams
2High beams
H7 bulb, 55 watts
The H7 bulb is pressurized. There-
fore, wear safety glasses and protec-
tive gloves. Failure to comply with these
precautions could result in physical injury if
the bulb is damaged.<
1.Turn the bulb holder to the left and pull
out
2.Remove and replace the bulb
3.Install in the reverse order.
When cleaning the headlamps,
please observe the instructions in the
Caring for your vehicle brochure.<
Xenon lamps*
The service life of these bulbs is very long
and the probability of a failure is very low,
provided that they are not switched on and
off an unusual number of times. If one of
these bulbs should nevertheless fail, it is
possible to continue driving with great cau-
tion using the fog lamps, provided traffic
laws in your area do not prohibit this.
Because of the extremely high volt-
ages involved, any work on the xenon
lighting system, including bulb-changing,
should be carried out by technically quali-
fied personnel only. Otherwise, there is a
risk of fatal injury.<

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Please contact a BMW center in case of a
malfunction.
License plate lamps
5 watt bulb
1.Push out the lamp with a suitable object
and remove it
2.Replace the bulb.
Snap the lamp back into place.
Changing a wheel
Run Flat tires
Your BMW is equipped with Run Flat tires.
Therefore, the wheel no longer has to be
changed immediately in the event of a loss
in inflation pressure.
Run Flat tires are labeled on the sidewall
with a circular symbol containing the letters
RSC. Refer to page 80.
BMW recommends that you consult your
BMW center if you wish to replace the tires
of your BMW, or change from summer to
winter tires or vice versa.
Your BMW center knows how to work with
Run Flat tires and is equipped with the nec-
essary special tools.
When mounting or replacing summer
tires with winter tires, or vice versa,
use only Run Flat tires since no spare
wheel is available in the event of a flat.<
Jacking points
The jacking points are located at the posi-
tions indicated in the illustration.
Your BMW center can provide you
with a suitable jack.<
Battery
Maintenance
The battery is completely maintenance-
free. This means that the original electro-
lyte will normally last for the service life of
the battery under moderate climatic condi-
tions.
Please consult your BMW center
whenever you have any questions
concerning the battery.<
Indicator lamp
The indicator lamp for the battery
charge current lights up:
The battery is no longer being
charged. The alternator drive belt is defec-
tive or there is a malfunction in the charging
circuit of the alternator. Please contact the
nearest BMW center.
If the drive belt is defective, pull over
and switch off the engine immediately
to prevent overheating and serious engine
damage.
If the onboard supply voltage drops to a
very low level, increased steering effort
may also be necessary.<

Replacement procedures
92
Charging the battery
Charge the battery in the vehicle only when
the engine is not running. For information
on connections, refer to Jump-starting on
page 94.
Battery disposal
Return used batteries to a recycling
point or to your BMW center. Maintain
the battery in an upright position for trans-
port and storage. Secure the battery
against tilting when transporting.<
Fuses
You will find the fuses and information on
their respective allocation behind the glove
compartment.
1.Open the glove compartment
2.Press the lock on the left; see arrow 1
3.Press the lock on the right; see arrow 2
4.Swing the glove compartment down.
Spare fuses and plastic tweezers for grasp-
ing the fuses are found in the onboard tool
kit; refer to page 88.
Do not attempt to repair a burned fuse
or replace it with a fuse having a dif-
ferent color or amperage rating. To do this
could cause a fire in the vehicle as a result
of circuit overload.<

Giving and receiving assistance
94
Warning triangle*
The warning triangle is stored in the rear
luggage compartment panel.
Pull the ends of the rubber bands upward
and out of the fasteners.
Always observe all legal regulations
requiring a warning triangle to be car-
ried in the vehicle.<
First-aid kit*
The first-aid kit is located beneath the pas-
senger seat.
To open
Pull the handle and fold the cover down-
ward.
To close
Fold the cover up and press into the catch.
Some of the articles in the first-aid kit
have a limited period of use before
expiration. For this reason, check the expi-
ration dates of each of the items regularly,
and replace any whose expiration dates
have passed. You can acquire replace-
ments in any drugstore or pharmacy.
Always observe all legal regulations requir-ing a first-aid kit to be carried in the vehi-
cle.<
Jump-starting
When your battery is discharged you can
use two jumper cables to start your vehicle
with power from the battery in a second
vehicle. You can also use the same method
to help start another vehicle. Always use
jumper cables with fully insulated handles
on the terminal clamps.
Do not touch components carrying
current on a running engine. Contact
with these components can cause fatal
injury. Carefully observe the following
instructions to avoid personal injury and/or
damage to one or both vehicles.<
Preparations
1.Check whether the battery of the sup-
port vehicle has 12 volts and approxi-
mately the same capacity – measured in
Ah. This information is provided on the
battery
2.Stop the engine of the support vehicle
3.Switch off all electrical accessories in
both vehicles
Make absolutely certain that there is
no contact between the bodywork of
the two vehicles: short circuit hazard.<

Reference
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Connecting jumper cables
Always adhere to this sequence when
connecting jumper cables; failure to
observe this procedure can lead to sparks
at the battery terminals and pose an injury
hazard.<
The auxiliary jump-starting terminal located
in your BMW's engine compartment acts as
the positive battery terminal. Refer to the
engine compartment overview on page 82.
The cover is marked with a +.
1.Open the cover of the BMW auxiliary
jump-starting terminal. Do so by pulling
the tab
2.With the + jumper cable, connect the
positive terminal of the drained battery
and the positive terminal of the support
battery.
To do this:
Connect one terminal clamp to the pos-
itive terminal of the battery or to an aux-
iliary jump-starting terminal of the sup-
port vehicle.
Connect the second terminal clamp to
the positive terminal of the battery or to
an auxiliary jump-starting terminal of
the vehicle to be jump-started.
Your BMW is equipped with a special
nut, refer also to the engine compart-
ment overview on page 823.With the – jumper cable, connect the
negative terminals of both vehicles.
To do this:
Attach one cable clamp to the negative
battery terminal or to a suitable ground
on the engine or body work of the sup-
port vehicle.
Attach the second cable clamp to the
negative battery terminal or to a suit-
able ground on the engine or body work
of the vehicle to be jump-started.
Starting the engine
1.Start the engine of the support vehicle
and let it run for several minutes at a
slightly elevated engine idle speed
2.Start the engine of the other vehicle as
usual.
If the first start attempt is not success-
ful, wait a few minutes before another
attempt in order to allow the discharged
battery to recharge.
3.Allow the engines to run for several
minutes
4.Then disconnect the jumper cables in
reverse sequence.
Depending on the cause of the fault, have
the battery checked and recharged by your
BMW center.
Never use spray starter fluids to start
the engine.<

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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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

Everything from A to Z
104
A
ABS Antilock Brake
System 54
– indicator lamp 13
Accessories, refer to
– For your own safety 5
– Your individual vehicle 5
Accident, refer to
Emergency call 93
Activated-charcoal filter 63
Adaptive Transmission
Control ATC 40
Air, drying,
refer to Air conditioning
mode 59, 62
Airbags 56
– deactivation 33
– indicator lamp 13
– passenger airbags
indicator lamp 34
– reactivation 33
– safe seating position 27
Airbag switch 33
Air conditioning 58
Air conditioning mode
– air conditioning 59
– automatic climate
control 62
Air conditioning mode
switching on/off
manually 59, 62
Air distribution
– air conditioning 59
– automatic climate
control 62
Airing out, refer to
Ventilation 59, 63
Air outlets,
refer to Ventilation 59, 63
Air pressure, refer to Tire
inflation pressure 75
Air recirculation, refer to
Recirculated-air
mode 59, 63Air supply/blower
– air conditioning 59
– automatic climate
control 62
AKI, refer to Fuel
specifications 74
Alarm system
– avoiding unintentional
alarms 26
Antenna, refer to the
Caring for your vehicle
brochure
Antifreeze 83, 84
– coolant 84
– washing fluids 83
Antilock Brake System
ABS 54
– indicator lamp 13
Anti-theft alarm system,
refer to Alarm system 25
Anti-theft protection 25
Approved axle load, refer to
Weights 101
Approved engine oils 84
Approved gross vehicle
weight, refer to
Weights 101
Artificial leather, refer to the
Caring for your vehicle
brochure
Ashtray 65
Assistant systems, refer to
Dynamic Stability Control
DSC 52
ATC Adaptive Transmission
Control 40
AUC Automatic
recirculated-air
control 63Automatic
– air distribution 62
– air supply/blower 62
– cruise control 45
– headlamp control 46
– luggage compartment lid
operation 19
Automatic car wash, refer
to the Caring for your
vehicle brochure
Automatic climate
control 61
Automatic recirculated-air
control AUC 63
Automatic transmission
with Steptronic 39
– ignition 36
– indicator lamp 13
– interlock 36
– selector lever lock 39
– shiftlock 39
AUTO program,
refer to Automatic air
distribution 62
Average fuel
consumption 51
– setting units of
measure 50
Average speed 51
– setting units of
measure 50
Axle loads, refer to
Weights 101
B
Backrest, refer to Seat
adjustment 28
Backup lamps 38
– bulb replacement 90
Bandages, refer to First-aid
kit 94
Everything from A to Z
Index

Reference
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Battery 91
– disposal 92
– indicator lamp 13, 91
– jump-starting 94
– remote control 17
Belts, refer to Safety
belts 30
Belt tensioner, refer to
Safety belts 30
Beverage holders 65
Blower
– air conditioning 59
– automatic climate
control 62
Blower, refer to Air
supply 59, 62
BMW 5
Bore, refer to Engine
data 100
Bottle holders, refer to
Beverage holders 65
Brake fluid 85
– filling 85
– indicator/warning
lamp 13, 85
– level 85
Brake force display 53
Brake hydraulic system 85
– indicator/warning
lamp 13, 69, 85
Brake lamps
– bulb replacement 90
– indicator lamp, defective
lamp 13
Brake pads 70
– break-in procedures 68
– indicator lamp 70
Brake pad wear indicator
– brake pads 70
– indicator lamp 13
Brake rotors
– brake system 69
– break-in procedures 68
Brakes 69
– ABS 54
– brake fluid 85
– break-in procedures 68
– indicator/warning
lamps 13, 52, 53, 54
– parking brake 38Brake system 69
– brake fluid level 85
– brake pads 70
– break-in procedures 68
– disc brakes 69
– indicator lamp 13
Breakdown
– Flat Tire Monitor 54
Break-in procedures 68
Bulb replacement, refer to
Lamps and bulbs 88
Buttons in steering
wheel 11
C
California Proposition
65 warning 87
Can holders, refer to
Beverage holders 65
Capacities 103
Car battery 91
Car care, refer to the Caring
for your vehicle brochure
Car-care products, refer to
the Caring for your
vehicle brochure
Care, refer to the Caring for
your vehicle brochure
Cargo loading
– vehicle 70
Car keys, refer to Keys 16
Carpet care, refer to the
Caring for your vehicle
brochure
Car radio, refer to Owner's
Manual for Radio
Car telephone, refer to
Owner's Manual for
Telephone
Car wash, refer to the
Caring for your vehicle
brochure
Catalytic converter, refer to
High temperatures 69
CD player operation, refer
to Owner's Manual
for Radio
Center high-mount brake
lamp
– bulb replacement 90Central locking system 16
– interior 18
Changing a wheel 91
Charge indicator
lamp 13, 91
Check Gas Cap
– indicator lamp 13
Child-restraint mounting
system, LATCH 35
Child-restraint systems 33
Child seat, refer to Child-
restraint systems 33
Chrome parts, refer to the
Caring for your vehicle
brochure
Cigarette lighter 65
Cigarette lighter socket 65
Cleaning the rear window,
refer to the Caring for
your vehicle brochure
Cleaning the vehicle, refer
to the Caring for your
vehicle brochure
Cleaning the windshield 44
Clock 49, 50
– 12- or 24-hour mode 50
– refer to Owner's Manual
for Radio/Onboard
Computer
– setting 49
Clothes hooks 25
Clutch
– break-in procedures 68
Cockpit 10
Cold start, refer to
Starting the engine 36
Compact disc operation,
refer to Owner's Manual
for Radio
Compartments 64
Compression ratio, refer to
Engine data 100
Computer 50
– clock, 12- or 24-hour
mode 50
– refer to Owner's Manual
for Onboard Computer
Computer, refer to
Onboard Computer 50
Condensation, refer to Air
conditioning mode 59, 62