2015 BMW Z4 tire pressure

ficiency and tire tread life, and may affect the
vehicle's handling and stopping ability.
Please note that the TPMS is not a substitute
for proper tire maintenance, and it is the driv‐
er's responsibility to maintain correct tire pres‐
sure, even if under-inflation has not reached
the level to trigger illumination of the TPMS
low tire pressure telltale.
Your vehicle has also been equipped with a
TPMS malfunction indicator to indicate when
the system is not operating properly. The
TPMS malfunction indicator is combined with
the low tire pressure telltale. When the system
detects a malfunction, the telltale will flash for
approximately one minute and then remain
continuously illuminated. This sequence will
continue upon subsequent vehicle startups as
long as the malfunction exists. When the mal‐
function indicator is illuminated, the system
may not be able to detect or signal low tire
pressure as intended. TPMS malfunctions may
occur for a variety of reasons, including the in‐
stallation of replacement or alternate tires or
wheels on the vehicle that prevent the TPMS
from functioning properly. Always check the
TPMS malfunction telltale after replacing one
or more tires or wheels on your vehicle to en‐
sure that the replacement or alternate tires and
wheels allow the TPMS to continue to function
properly.Brake force display
The concept▷During normal brake application, the brake
lamps light up.▷During heavy brake application, the turn
signals light up in addition.
The brake force display is not activated if the
turn signal function is switched on.
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Objects in the area around the pedalsNo objects in the area around the pedals
Keep floor mats, carpets, and any other
objects out of the area of motion of the pedals;
otherwise, the function of the pedals could be
impeded while driving
Do not place additional floor mats over existing
mats or other objects.
Only use floor mats that have been approved
for the vehicle and can be properly fixed in
place.
Ensure that the floor mats are securely fas‐
tened again when they are returned after being
removed, such as for cleaning.◀
Driving in wet conditionsWhen roads are wet or there is heavy rain,
briefly exert gentle pressure on the brake pedal
every few miles.
Ensure that this action does not endanger
other road users.
The heat generated in this process helps dry
the brake discs and pads.
In this way braking efficiency will be available
when you need it.
Hills
Drive long or steep downhill gradients in the
gear in which the least braking is required.
Otherwise, the brake system may overheat, re‐
sulting in a reduction in the brake system effi‐
ciency.
You can increase the engine's braking effect
by shifting down, going all the way to first gear,
if necessary.
Downshifting in manual mode of the 8-gear
Sport automatic transmission, refer to
page 67.
Downshifting in manual mode of the 7-gear
Sport automatic transmission with dual clutch,
refer to page 70.Avoid load on the brakes
Avoid placing excessive load on the
brake system. Light but consistent brake pres‐
sure can lead to high temperatures, brake wear
and possibly even brake failure.◀
Do not drive in neutral
Never drive with the transmission in neu‐
tral, with the engine switched off or with the
clutch depressed; otherwise, you will have nei‐
ther the braking action of the engine or nor its
power assistance when braking or steering.◀
Brake disc corrosion Corrosion on the brake discs and contamina‐
tion on the brake pads are furthered by:▷Low mileage.▷Extended periods when the vehicle is not
used at all.▷Infrequent use of the brakes.
Corrosion occurs when the minimum pressure
that must be exerted by the pads during brake
applications to clean the discs is not reached.
Should corrosion form on the brake discs, the
brakes will tend to respond with a pulsating ef‐
fect that generally cannot be corrected.
Condensation under the parked
vehicle
When using the automatic climate control,
condensation water develops that exits under‐
neath the vehicle.
Therefore, traces of condensed water under
the vehicle are normal.
Loading Overloading the vehicle
To avoid exceeding the approved carry‐
ing capacity of the tires, never overload the ve‐
hicle. Overloading can lead to overheating and
increases the rate at which damage develops
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inside the tires. This could result in a sudden
loss of tire inflation pressure.◀
Secure heavy objects
Never transport unsecured heavy or hard
objects in the passenger compartment, as they
could be thrown around and pose a safety haz‐
ard to the vehicle's occupants during abrupt
braking or evasive maneuvers.◀
No fluids in the cargo area
Make sure that fluids do not leak into the
cargo area; otherwise, the vehicle may be dam‐
aged.◀
Determining the load limit1.Locate the following statement on your ve‐
hicle's placard:▷The combined weight of occupants
and cargo should never exceed XXX kg
or YYY lbs. Otherwise, damage to the
vehicle and unstable driving situations
may result.2.Determine the combined weight of the
driver and passengers that will be riding in
your vehicle.3.Subtract the combined weight of the driver
and passengers from XXX kilograms or
YYY pounds.4.The resulting figure equals the available
amount of cargo and luggage load ca‐
pacity.
For example, if the YYY amount equals
1,400 lbs and there will be five 150 lbs pas‐
sengers in your vehicle, the amount ofavailable cargo and luggage load capacity
is 650 lbs: 1,400 lbs minus 750 lbs =
650 lbs.5.Determine the combined weight of lug‐
gage and cargo being loaded on the vehi‐
cle. That weight may not safely exceed the
available cargo and luggage load capacity
calculated in Step 4.6.If your vehicle will be towing a trailer, load
from your trailer will be transfered to your
vehicle. Consult the manual for transport‐
ing a trailer to determine how this may re‐
duce the available cargo and luggage load
capacity of your vehicle.
Load
The maximum load is the sum of the weight of
the occupants and the cargo.
The greater the weight of the occupants, the
less cargo that can be transported.
Stowing cargo
Cargo area
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Remove attached parts following use
Remove auxiliary mirrors or rear-mounted lug‐
gage racks after use.
Attached parts on the vehicle impair the aero‐
dynamics and increase the fuel consumption.
Close both windows
An open window causes higher air resistance
and thus increases fuel consumption.
Tires
General information
Tires can have varying effects on fuel con‐
sumption; for example, fuel consumption can
be influenced by the tire size.
Check the tire inflation pressure
regularly
Check and, if necessary, correct the tire infla‐
tion pressure, refer to page 228, at least twice
a month and before starting on a long trip.
Low tire inflation pressure increases rolling re‐
sistance and thus raises fuel consumption and
tire wear.
Drive away without delay Do not wait for the engine to warm-up while
the vehicle remains stationary. Start driving
right away, but at moderate engine speeds.
This is the fastest way for the cold engine to
reach its operating temperature.
Look well ahead when driving
Avoid unnecessary acceleration and braking.
By maintaining a suitable distance to the vehi‐ cle driving ahead of you.
Driving smoothly and looking ahead reduces
fuel consumption.
Avoid high engine speeds Use 1st gear to get the vehicle in motion. Be‐
ginning with 2nd gear, accelerate rapidly.When accelerating, shift up before reaching high engine speeds.
When you reach the desired speed, shift into
the highest applicable gear and drive with the
engine speed as low as possible and at a con‐
stant speed.
As a rule: driving at low engine speeds lowers
fuel consumption and reduces wear.
Use coasting conditions When approaching a red light, take your foot
off the accelerator and coast to a halt in the
highest applicable gear.
On a downhill slope, take your foot off the ac‐
celerator and coast in a suitable gear.
The flow of fuel is interrupted while coasting.
Switch off the engine during longer
stops
Switch off the engine during longer stops, e.g.,
at traffic lights, railroad crossings or in traffic
congestion.
Automatic Engine Start/Stop Function The Automatic Engine Start/Stop Function au‐
tomatically switches the engine off during a
stop.
If the engine is stopped and then started again,
fuel consumption and emissions drop com‐
pared to an engine that runs permanently.
Stopping the engine even for just a few sec‐
onds can result in savings.
Use of this system can cause premature wear
on certain vehicle components.
In addition, fuel consumption depends on
other factors as well, such as driving style, road
conditions, maintenance, and environmental
factors.
Additional information on the Automatic En‐
gine Start/Stop Function, refer to page 59.Seite 135Things to remember when drivingDriving tips135
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Wheels and tiresVehicle equipment
This chapter describes all series equipment as
well as country-specific and special equipment
offered for this model series. Therefore, it also
describes equipment that may not be found in
your vehicle, for instance due to the selected
special equipment or the country version. This
also applies to safety-related functions and
systems.
When using the features and systems descri‐
bed here, adhere to local regulations.
Tire inflation pressure Information for your safety
It is not merely the tires' service life, but also
driving comfort and, to a great extent, driving
safety that depend on the condition of the tires
and the maintenance of the specified tire pres‐
sure.
Check the tire inflation pressure regularly
Regularly check the tire inflation pres‐
sure and correct it as needed: at least twice a
month and before a long trip. If you fail to ob‐
serve this precaution, you may be driving on
tires with incorrect tire pressures, a condition
that may not only compromise your vehicle's
driving stability, but also lead to tire damage
and the risk of an accident.◀
Checking the pressure Tires naturally lose pressure uniformly across
all four tires.
Only check the tire inflation pressure when the
tires are cold. This means after a maximum of
1.25 miles/2 km driving or when the vehicle
has been parked for at least 2 hours. When the
tires are warm, the tire inflation pressure is
higher.Tires warm up during driving and the tire infla‐
tion pressure increases as the temperature
rises. The tire inflation pressure specifications
apply to cold tires or tires at ambient tempera‐
ture.
Only check the tire inflation pressure when the
tires are cold. This means after a maximum of
1.25 miles/2 km driving or when the vehicle
has been parked for at least 2 hours.
The values displayed by tire inflation stations
may be up to 0.1 bar, 2 psi too low.
For the Flat Tire Monitor: after adjusting the
tire inflation pressure to a new value, reinitialize
the Flat Tire Monitor, refer to page 94.
For the Tire Pressure Monitor: after adjusting
the tire inflation pressure to a new value, reset
the Tire Pressure Monitor, refer to page 97.
Pressure specifications The tables below provide all the correct infla‐
tion pressures for the specified tire sizes at
ambient temperature.
The inflation pressures apply to the tire sizes
approved and tire brands recommended by
BMW; a list of these is available from your
service center.
For correct identification of the right tire infla‐
tion pressures, observe the following:▷Tire sizes of your vehicle.▷Maximum allowable driving speed.
Tire inflation pressures for driving up
to 100 mph or 160 km/h
For normal driving up to 100 mph/160 km/h,
adjust pressures to the respective tire inflation
pressures listed on the following pages in the
column for traveling speeds up to 100 mph/
160 km/h to achieve optimum driving comfort.
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These tire inflation pressures can also be
found on the driver's side door pillar when the
driver's door is open.
Do not exceed the maximum permissible
speed
The maximum permissible speed for these tire
pressures is 100 mph/160 km/h Do not exceed
this speed; otherwise, tire damage and acci‐
dents could occur.◀
Tire inflation pressures for driving
above 100 mph or 160 km/h
Adjust the tire inflation pressures
To drive at maximum speeds in excess of
100 mph/160 km/h, adjust pressures to the re‐
spective tire inflation pressures listed on the
following pages in the column for traveling
speeds including those exceeding 100 mph or
160 km/h. Otherwise, tire damage and acci‐
dents could occur.◀
Observe all national and local maximum speed
limits; otherwise, violations of the laws could
occur.
Tire inflation pressures Z4 sDrive28i

Tire sizePressure specifications in bar/PSITraveling speeds of up
to 100 mph/160 km/hTraveling speeds in‐
cluding those exceed‐
ing 100 mph/160 km/hAll pressure specifications in the table are in‐
dicated in bar/psi with cold tires.
Cold = ambient temperatureWithout Sport Package:225/45 R 17 91 V RSC
225/45 R 17 91 H M+S RSC
225/45 R 17 94 V M+S XL RSC2.5/363.0/442.5/363.0/44Front: 225/45 R 17 91 V RSC2.5/36-2.5/36-Rear: 255/40 R 17 94 V RSC-2.7/39-2.7/39Front: 225/40 R 18 88 W RSC2.5/36-2.5/36-Rear: 255/35 R 18 90 W RSC-2.9/42-2.9/42Front: 225/35 R 19 88 Y XL RSC2.5/36-2.5/36-Rear: 255/30 R 19 91 Y XL RSC-2.9/42-2.9/42Seite 229Wheels and tiresMobility229
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Tire sizePressure specifications in bar/PSIWith Sport Package:225/45 R 17 91 W RSC
225/45 R 17 91 H M+S RSC
225/45 R 17 94 V M+S XL RSC2.5/363.0/442.5/363.0/44Front: 225/45 R 17 91 W RSC2.5/36-2.5/36-Rear: 255/40 R 17 94 W RSC-2.7/39-2.7/39Front: 225/40 R 18 88 W RSC2.5/36-2.6/38-Rear: 255/35 R 18 90 W RSC-2.9/42-3.1/45Front: 225/35 R 19 88 Y XL RSC2.5/36-2.5/36-Rear: 255/30 R 19 91 Y XL RSC-2.9/42-3.0/44More details on the permissible load and weights, refer to page 264.
Tire inflation pressures Z4 sDrive35i

Tire sizePressure specifications in bar/PSITraveling speeds of up
to 100 mph/160 km/hTraveling speeds in‐
cluding those exceed‐
ing 100 mph/160 km/hAll pressure specifications in the table are in‐
dicated in bar/psi with cold tires.
Cold = ambient temperatureWithout Sport Package:225/45 R 17 91 H M+S RSC
225/45 R 17 94 V M+S XL RSC2.5/363.0/442.5/363.0/44Front: 225/45 R 17 91 V RSC2.5/36-2.5/36-Rear: 255/40 R 17 94 V RSC-2.7/39-2.7/39Front: 225/40 R 18 88 W RSC2.5/36-2.5/36-Rear: 255/35 R 18 90 W RSC-2.9/42-2.9/42Front: 225/35 R 19 88 Y XL RSC2.5/36-2.5/36-Rear: 255/30 R 19 91 Y XL RSC-2.9/42-2.9/42Seite 230MobilityWheels and tires230
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Tire sizePressure specifications in bar/PSIWith Sport Package:225/45 R 17 91 H M+S RSC
225/45 R 17 94 V M+S XL RSC2.5/363.0/442.5/363.0/44Front: 225/45 R 17 91 W RSC2.5/36-2.5/36-Rear: 255/40 R 17 94 W RSC-2.7/39-2.8/41Front: 225/40 R 18 88 W RSC2.5/36-2.7/39-Rear: 255/35 R 18 90 W RSC-2.9/42-3.2/46Front: 225/35 R 19 88 Y XL RSC2.5/36-2.5/36-Rear: 255/30 R 19 91 Y XL RSC-2.9/42-3.0/44More details on the permissible load and weights, refer to page 264.
Tire inflation pressures Z4 sDrive35is

Tire sizePressure specifications in bar/PSITraveling speeds of up
to 100 mph/160 km/hTraveling speeds in‐
cluding those exceed‐
ing 100 mph/160 km/hAll pressure specifications in the table are in‐
dicated in bar/psi with cold tires.
Cold = ambient temperature225/45 R 17 91 H M+S RSC
225/45 R 17 94 V M+S XL RSC2.5/363.0/442.5/363.0/44Front: 225/40 R 18 88 W RSC2.7/39-2.7/39-Rear: 255/35 R 18 90 W RSC-3.2/46-3.2/46Front: 225/35 R 19 88 Y XL RSC2.5/36-2.5/36-Rear: 255/30 R 19 91 Y XL RSC-3.0/44-3.0/44More details on the permissible load and weights, refer to page 264.Tire identification marks
Knowledge of the labeling on the side of the
tire makes it easier to identify and choose the
right tires.Tire size
Example: 225/45 R 17 91 V
225: nominal width in mm
45: aspect ratio in %Seite 231Wheels and tiresMobility231
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