2005 BMW Z4 ROADSTER 3.0I maintenance

Z4 2.5i
Z4 3.0iCongratulations, and thank you for choosing a BMW.
Thorough familiarity with your vehicle will provide you with
enhanced control and security when you drive it. Therefore, we
have one request:
Please take the time to read this Owner's Manual and familiarize
yourself with the information that we have compiled for you
before starting off in your new BMW. The manual contains
important data and instructions intended to assist you in obtain-
ing maximum satisfaction from your BMW's unique array of
advanced technical features. It also contains information on vehi-
cle maintenance designed to enhance operating safety while
simultaneously helping you to maintain your BMW's value
throughout an extended service life. For additional information
refer to the supplemental manuals.
This Owner's Manual should be considered a permanent part of
this vehicle. It should stay with the vehicle when sold to provide
the next owner with important operating, safety and maintenance
information.
We wish you an enjoyable driving experience.
BMW AG

Reference
At a glance
Controls
Driving tips
Mobility
Contents
The fastest way to find information on special
topics is by using the index starting on
page106.
Using this Owner's Manual
4Notes
At a glance
10Cockpit
Controls
16Opening and closing
27Adjustments
33Transporting children safely
36Driving
46Everything under control
50Technology for safety and driving
convenience
56Lamps
58Controlling the climate for pleasant
driving
64Interior conveniences
Driving tips
68Special operating instructions
Mobility
76Refueling
78Wheels and tires
84In the engine compartment
89Maintenance
91Replacement procedures
96Giving and receiving assistance
Reference
102Technical data
106Everything from A to Z

Notes
6
For your own safety
Maintenance and repair
Advanced technology, e. g. the use of
modern materials and high-performance
electronics, requires specially adapted mainte-
nance and repair methods. Therefore, only have
corresponding work on your BMW carried out
by a BMW center or a workshop that works
according to BMW repair procedures with cor-
respondingly trained personnel. If work is car-
ried out improperly there is a danger of conse-
quential damage and the related safety risks.<
California Proposition 65 warning
California laws require us to state the following
warning:
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the interior fur-
nishings 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 fluids contained in vehicles and
certain products of component wear contain or
emit chemicals known to the State of CA to
cause cancer and birth defects or other repro-
ductive harm.
Battery posts, terminals and related accesso-
ries contain lead and lead compounds. Batter-
ies also contain other chemicals known to the
State of California to cause cancer. Wash your
hands after handling.
Used engine oil contains chemicals that have
caused cancer in laboratory animals. Always
protect your skin by washing thoroughly with
soap and water.<
Parts and accessories
For your own safety, use parts and acces-
sories approved by BMW.
When you purchase accessories tested and
approved by BMW and Original BMW Parts, you
simultaneously acquire the assurance that they
have been thoroughly tested by BMW to ensure
optimum performance when installed on your
vehicle. BMW warrants these parts to be free from
defects in material and workmanship.
BMW will not accept any liability for damage
resulting from installation of parts and accesso-
ries not approved by BMW.
BMW cannot test every product made by other
manufacturers to verify if it can be used on a
BMW safely and without risk to either the vehi-
cle, its operation, or its occupants.
Original BMW Parts, BMW Accessories and
other products approved by BMW, together
with professional advice on using these items,
are available from all BMW retailers.
Installation and operation of non-BMW
approved accessories such as alarms, radios,
amplifiers, radar detectors, wheels, suspension
components, brake dust shields, telephones,
including operation of any portable cellular
phone from within the vehicle without using an
externally mounted antenna, or transceiver
equipment, e.g. C.B., walkie-talkie, ham radio or
similar, may cause extensive damage to the
vehicle, compromise its safety, interfere with
the vehicle's electrical system or affect the
validity of the BMW Limited Warranty. See your
BMW center for additional information.
Do not use key or remote control to lock doors
or trunk with anyone inside the vehicle. Refer to
the Owner's Manual for more details.<
Maintenance, replacement or repair of
the emission control devices and sys-
tems may be performed by any automotive
repair establishment or individual using any cer-
tified automotive part.<

Reference
At a glance
Controls
Driving tips
Mobility
59
Air distribution
You can direct airflow onto the win-
dows , toward the upper body
and into the footwell . All interme-
diate settings are possible.
Air supply/blower
Turn the rotary control to adjust the
air supply. Both heating and ventila-
tion become more effective as the air
supply rate is increased.
Turn the rotary control toward zero:
The blower and the heating are turned off, and
the air supply is stopped.
Temperature
In order to increase the temperature
of the passenger compartment, turn
to the right toward the red zone.
Air conditioning
The air is cooled and dehumidified
and, depending on the temperature
setting, rewarmed.
Depending on the weather, the wind-
shield may fog over briefly when the engine is
started.
Condensation forms during operation of
the air conditioning system, which then
exits under the vehicle. Traces of condensed
water on the ground underneath the vehicle are
thus normal.<
Outside air/recirculated air mode
If there are unpleasant odors in the
outside air, you can temporarily block
the supply of incoming air. The sys-
tem then recirculates the air currently
within the vehicle.
If the windows fog over in the recirculated
air mode, switch this mode off and
increase the air supply as required. Do not use
the recirculated-air mode continuously over a
long period of time as this would otherwise
reduce the air quality in the interior of the vehi-
cle.<
Rear window defroster
The indicator lamp lights up when
the rear window defroster is active.
The rear window defroster switches
off automatically.
Ventilation
You can adjust the blower controls for the upper
body area to obtain the optimum airflow rates
and directions for your personal requirements:
1Rotary dials for opening and closing the
vents at any setting desired
2Slide for adjusting airflow direction
Microfilter
The built-in microfilter removes dust and pollen
from the incoming air and in the recirculated air
mode. Your BMW center will replace this filter
during the regularly scheduled maintenance. A
substantial reduction in airflow indicates that
the filter needs to be replaced earlier.

Reference
At a glance
Controls
Driving tips
Mobility
63
By repeatedly pressing the button, you can
select one of three different operating modes.
>Indicator lamps off: outside air flows into the
vehicle
>Left-hand indicator lamp on, AUC mode:
the system detects pollutants in the outside
air and responds by deactivating the out-
side airflow as required. The system then
recirculates the air currently within the vehi-
cle. Depending on air quality requirements,
the system automatically switches between
outside air supply and recirculation of the air
already within the vehicle
>Right-hand indicator lamp on: the flow of
outside air is permanently blocked. The
system recirculates the air already within
the vehicle.
If the windows fog over in the recirculated
air mode, switch this mode off and
increase the air supply as required. Do not use
the recirculated-air mode continuously over a
long period of time as this would otherwise
reduce the air quality in the interior of the vehi-
cle.<
Rear window defroster
The indicator lamp lights up when
the rear window defroster is active.
The rear window defroster switches
off automatically.
Ventilation
You can adjust the blower controls for the upper
body area to obtain the optimum airflow rates
and directions for your personal requirements:1Rotary dials for opening and closing the
vents at any setting desired
2Slide for adjusting airflow direction
Microfilter/activated-charcoal filter
The built-in microfilter removes dust and pollen
from the incoming air. The activated-charcoal
filter provides additional protection by filtering
gaseous pollutants from the outside air. Your
BMW center replaces this combined filter as a
standard part of your scheduled maintenance.
A substantial reduction in airflow indicates that
the filter needs to be replaced earlier.

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 breakdown.
Mobility

Reference
At a glance
Controls
Driving tips
Mobility
77
Minimum Octane Rating corresponds to the
Anti Knock Index AKI and is determined by the
so-called (R+M)/2 method.
Do not use leaded gasoline, as otherwise
the lambda probe and catalytic converter
will be permanently damaged.<
Use high-quality brands
Field experience has indicated significant dif-
ferences in fuel quality: volatility, composition,
additives, etc., among gasolines offered for sale
in the United States and Canada. Fuels contain-
ing up to and including 10 % ethanol or other
oxygenates with up to 2.8 % oxygen by weight,
that is, 15 % MTBE or 3 % methanol plus an
equivalent amount of co-solvent, will not void
the applicable warranties with respect to
defects in materials or workmanship.
The use of poor-quality fuels may result in
drivability, starting and stalling problems
especially under certain environmental condi-
tions such as high ambient temperature and
high altitude.
Should you encounter drivability problems
which you suspect could be related to the fuel
you are using, we recommend that you respond
by switching to a recognized high-quality
brand.
Failure to comply with these recommendations
may also result in unscheduled maintenance.<

Wheels and tires
78
Wheels and tires
Tire inflation pressure
Information for your safety
It is not merely the tire's service life, but also
driving safety and driving comfort that largely
depend on the condition of the tires and the
maintenance of the specified tire pressure.
Checking tire pressures
Check the tire inflation pressures only when the
tires are cold. This means after a maximum driv-
ing distance of 1.25 miles/2 km or if the vehicle
has been parked for at least 2 hours. Warm tires
have higher inflation pressures.
Check tire inflation pressures regularly
and correct them if necessary: at least
every two weeks and before every extended
journey. Otherwise, incorrect tire pressures can
cause driving instability or tire damage, ulti-
mately resulting in accidents.<
Reinitialize the Flat Tire Monitor after cor-
recting the tire inflation pressure. Refer to
page52.<
Inflation pressures for original tires
The specified inflation pressures for tires at
ambient temperature are provided on the plac-
ard on the B-pillar and are visible when the
driver's door is open.
Inflation pressures for other tire sizes
The following tire inflation pressure tables show
the inflation pressures for the specified tire
sizes at ambient temperature.To determine the correct tire inflation
pressure for your tires, observe the pres-
sures listed for the relevant tire sizes.<
Tire size
The inflation pressures in the table apply to
BMW-approved tire sizes and recommended
tire brands. Your BMW center will be glad to
supply this information.