2006 BMW X3 3.0I tire size

Technology for comfort, convenience and safety
54 In the event of malfunctions, deactivation, or
triggering of the airbag restraint system, have
the testing, repair, removal, and disposal of air-
bag generators executed only by a BMW Sports
Activity Vehicle Center or a workshop that
works according to BMW repair procedures
with correspondingly trained personnel and has
the required explosives licenses. Unprofes-
sional attempts to service the system could
lead to failure in an emergency or undesired air-
bag activation, either of which could result in
personal injury.<
Airbag warnings and information are also pro-
vided on the sun visors.
Automatic deactivation of front
passenger airbags
By evaluating the pressure on the seat cushion
of the front passenger seat, the system detects
whether or not the seat is occupied. The front
and side airbags for the passenger are activated
or deactivated by the system accordingly.
The indicator lamp located above the
inside rearview mirror indicates whether
the front passenger airbag system is currently
deactivated or activated, refer to Status of pas-
senger airbag in the section below.<
Before transporting a child in the front
passenger seat, follow the safety notices
and instructions under Transporting children
safely, refer to page33.
When teenagers or adults assume certain sit-
ting positions, the front and side airbags on the
passenger side can deactivate; this causes the
indicator lamp for the front passenger airbag to
light up. If this happens, have them change their
sitting position so that the passenger airbag is
activated and the indicator lamp goes out. If the
desired status cannot be achieved by changing
their sitting position, then have the person ride
in the back. Do not attach seat covers, seat
cushion padding, ball mats or other items to the
passenger seat unless they are specifically rec-
ommended by BMW. Do not place any items
under the seat which could press against the
seat from below. Otherwise, a correct analysis
of the seat cushion is not ensured.<
Status of passenger airbags
The indicator lamp for the passenger airbag
indicates the operational readiness of the front
and side airbag on the passenger side depend-
ing on whether or not the seat is occupied. The
indicator lamp indicates whether the passenger
airbags are activated or deactivated.
>The indicator lamp lights up when a child
sitting as directed in a child restraint system
designed for this is detected.
The front and side airbags on the passenger
side are not activated.
>The indicator lamp does not come on as
long as a person of sufficient size and in a
correct sitting position is detected on the
seat. The front and side airbags for the pas-
senger are activated.
>The indicator lamp does not light up when
the seat is empty.
However, the front and side airbags for the
passenger are not activated.
Operational readiness of airbag system
As of ignition key position 1, the warning lamp
lights up briefly, thus indicating the operational
readiness of the entire airbag system and the
safety belt tensioners.

Wheels and tires
86
Wheels and tires
Tire inflation pressure
Information for your safety
The condition of the tires and the maintenance
of the specified tire pressure are crucial not only
to the tire's service life, but also to driving com-
fort and most importantly, driving safety.
Checking pressure
Only check 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 tires are
warm, the tire inflation pressure increases.
Check the tire inflation pressure regularly
and correct it as needed, even on the
compact wheel: at least twice a month and
before starting long trips. If you fail to observe
this precaution, you may be driving on tires with
incorrect tire pressures, a condition that can not
only compromise your vehicle's driving stability,
but also lead to tire damage and the risk of an
accident.
Do not drive with deflated, i.e. flat tires. A flat tire
will seriously impair your vehicle's handling and
braking response. Attempts to drive on a flat tire
can lead to loss of control over the vehicle.<
After correcting the tire inflation pressure,
reinitialize the Flat Tire Monitor
* or reset
the Tire Pressure Monitor
*, refer to pages51,
52.<
Pressure specifications
The table on the next page provides all the cor-
rect inflation pressures for the specified tire
sizes at ambient temperature.
The inflation pressures in the table apply
to BMW-approved tire sizes and recom-
mended tire brands. Your BMW Sports Activity
Vehicle Center will be glad to supply this infor-
mation. tion pressure for your tires, please note the fol-
lowing:
>Tire size for your vehicle
>Load status
>Maximum permissible driving speed
Tire inflation pressures for speeds
up to 100 mph/160 km/h
For normal driving at speeds of up to 100 mph/
160 km/h and to achieve an optimal driving
comfort, take note of the tire inflation pressures
listed on the following page in the column for
speeds up to max. 100 mph/160 km/h and
adjust your tire pressure as needed.
These tire inflation pressures are also listed on
the door pillar and can be seen with the driver's
door open.
The maximum permissible speed for
these tire inflation pressures is 100 mph/
160 km/h. Do not exceed this speed; failure to
heed this limit can lead to tire damage and acci-
dents.<
Tire inflation pressures for speeds
above 100 mph/160 km/h
In order to drive at maximum speeds
above 100 mph/160 km/h, take note of
the tire inflation pressures listed in the column
for speeds above 100 mph/160 km/h in the
table on the following page and adjust your tire
pressure as needed. Failure to due so can lead
to tire damage and accidents.<

Reference
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Mobility
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Observe all national and local maximum speed
limits; failure to do so could put you in violation
of the law.
X3 2.5i/3.0i
Tire sizePressure specifications in psi/kPa
Traveling speeds
of up to max.
100 mph/160 km/hTraveling speeds
including those above
100 mph/160 km/h
All pressure specifications in
the table are indicated in psi/
kilopascal with cold tires.
Cold = ambient temperature
235/55 R 17 99 H M+S 29/200 32/220 29/200 32/220 32/220 38/260
215/60 R 17 96 H M+S
235/50 R 18 97 H M+S32/220 35/240 32/220 35/240 35/240 41/280
Front: 235/50 R 18 97 V
Rear: 255/45 R 18 99 V32/220
––
32/22032/220
––
32/22035/240
––
38/260
Front: 235/45 R 19 95 W
Rear: 255/40 R 19 96W32/220
––
35/24032/220
––
35/24035/240
––
41/280
Compact wheel:
T 135/90 R 17 104 M61/420 61/420 61/420 61/420 61/420 61/420
More details on the permissible load and weights can be found on page116

Wheels and tires
88
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
Speed code letter
Q = up to 105 mph/160 km/h
T = up to 118 mph/190 km/h
H = up to 131 mph/210 km/h
V = up to 150 mph/240 km/h
W = up to 167 mph/270 km/h
Y = up to 186 mph/300 km/h
Tire Identification Number
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
DOT code:
Tire age
The tire's date of manufacture is indicated on
the sidewall:
DOT ... 0506 indicates that a tire was manufac-
tured in week 5 of the year 2006.BMW recommends that you replace all tires
after 6 years at most, even if some tires may last
for 10 years.
Uniform Tire Quality Grading
Quality grades can be found where applicable
on the tire sidewall between tread shoulder and
maximum section width.
For example:
Tread wear 200 Traction AA
Temperature A
DOT Quality Grades
Tread wear
Traction AA A B C
Temperature A B C
All passenger car tires must conform to
Federal Safety Requirements in addition
to these grades.<
Tread wear
The tread wear grade is a comparative rating
based on the wear rate of the tire when tested
under controlled conditions on a specified gov-
ernment test course.
For example, a tire graded 150 would wear one
and one-half (1γ) times as well on the govern-
ment course as a tire graded 100. The relative
performance of tires depends upon the actual
conditions of their use, however, and may devi-
ate significantly from the norm due to variations
in driving habits and service practices as well as
differences in road characteristics and climate.
Traction
The traction grades, from highest to lowest, are
AA, A, B, and C.
These grades represent the tire's ability to stop
on wet pavement as measured under controlled
conditions on specified government test sur-
faces of asphalt and concrete. A tire marked C
may have poor traction performance.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests, and does not include acceleration, cor-
nering, hydroplaning, or peak traction charac-
teristics.< e.g. 235/50 R 18 97 V
Nominal width in mm
Cross-sectional
relationship in Ξ
Radial tire code
Rim diameter in inches
Load rating,
not for ZR tires
Speed rating,
before R on ZR tires
e.g. DOT xxxx xxx 0506
Manufacturer code
for tire make
Tire size and tire design
Tire age

Wheels and tires
90 age and related safety hazards. Make sure that
the new wheels are balanced.<
Retreaded tires
BMW does not recommend the use of
retreaded tires; otherwise, driving safety
may be reduced. The causes for this include the
possibly different tire casing structures and the
often wide variations in their age, which can
result in a limited service life.<
The right wheels and tires
BMW recommends that you use only
wheel and tire combinations that BMW
has tested and approved for your particular
vehicle. Variations in factors such as manufac-
turing tolerances mean that even wheels and
tires with identical official size ratings could
actually have different dimensions than the
approved units – these differences could lead to
body contact and with it, the risk of severe acci-
dents. If non-approved wheels and tires are
used, BMW cannot evaluate their suitability,
and therefore cannot be held liable for driving
safety.<
You can ask your BMW Sports Activity Vehicle
Center for the correct wheel-and-tire combina-
tion.
The correct wheel-and-tire combination affects
various systems whose function would other-
wise be impaired, e.g. ABS, DSC or xDrive.
To maintain good handling and vehicle
response, use only tires of a single tread config-
uration from a single manufacturer. After a flat
tire, always have the original wheel-and-tire
combination remounted on the vehicle as soon
as possible.
Wheels equipped with electronics for
TPM Tire Pressure Monitor
When installing new tires or when changing
from summer tires to winter tires or vice versa,
only use wheels equipped with TPM electron-
ics; otherwise, the Tire Pressure Monitor can-
not detect a flat tire, refer to page52. Your
BMW Sports Activity Vehicle Center will be
happy to advise you in this regard.
Recommended tire brands
BMW recommends particular tire brands for
each tire size. You will recognize them by the
clearly visible BMW identification on the tire
sidewall.
With proper use, these tires meet the highest
standards for safety and handling characteris-
tics.
Special characteristics of winter tires
BMW recommends winter tires for use in cold
winter driving conditions. Although all-season
M+S tires do provide better winter traction than
summer tires, they generally fail to provide the
same levels of cold-weather performance as
winter tires.
Observing speed ratings
Never exceed the maximum speed for
which the winter tires are rated.<
Storage
Store wheels or tires in a cool, dry place, pro-
tecting them from light whenever possible. Pro-
tect the tires from contact with oil, grease and
fuel. Do not exceed the maximum tire inflation
pressure indicated on the side wall of the tire.

Reference
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Driving tips
Mobility
91
Snow chains*
Only certain fine-link snow chains are tested,
classified as road-safe, and recommended by
BMW. You can obtain a list of these from your
BMW Sports Activity Vehicle Center. It is only
permissible to use them in pairs and on the rear
wheels.
Follow the manufacturer's instructions when
installing snow chains.
Do not exceed a vehicle speed of 30 mph/
50 km/h with snow chains mounted.
It is not permissible to use snow chains on the
following tire sizes:
>255/45 R 18
>255/40 R 19
Do not initialize the Flat Tire Monitor
*
with snow chains installed; otherwise, the
instrument might issue an incorrect reading.
When you are driving with snow chains, it can
be beneficial to switch off DSC briefly, refer to
page49.<

Reference
At a glance
Controls
Driving tips
Mobility
105
2.Guide the jack head into the rectangular
recess of the jacking point when cranking
up, refer to drawing inset.
3.Jack the vehicle up until the wheel you are
changing is raised from the ground.
Mounting a wheel
1.Unscrew the lug bolts and remove the
wheel.
2.Remove accumulations of mud or dirt from
the mounting surfaces of the wheel and
hub. Clean the lug bolts.
3.Position the new wheel or compact wheel.
Secure the wheel by screwing at least two
lug bolts into opposite bolt holes. When you
mount wheels other than Genuine BMW
light-alloy wheels, different lug bolts may
also be required.
4.Screw in the remaining lug bolts. Tighten all
the bolts securely in a diagonal pattern.
5.Lower the jack and remove it from beneath
the vehicle.
After mounting
1.Tighten the lug bolts in a diagonal pattern.
To ensure safety, always have the lug
bolts checked with a calibrated
torque wrench as soon as possible to
ensure that they are tightened to the speci-
fied torque. The tightening torque is
101lbft/140Nm.<
2.Stow the defective wheel in the cargo area.
3.Check and correct the tire inflation pressure
at the earliest opportunity.
Protect valve stems and valve stem
seal caps from dirt and contamina-tion. Dirt in valve stems is a frequent source
of gradual air loss.<
4.Reinitialize the Flat Tire Monitor
* or reset
the Tire Pressure Monitor
*, refer to
pages51, 52.
Do not initialize the Flat Tire Monitor
when driving with a compact wheel.<
5.Replace the damaged tire with a new one as
soon as possible and have the new wheel
balanced.
Driving with compact wheel
Drive reservedly and do not exceed a
speed of 50 mph/80 km/h. Do not deacti-
vate DSC; otherwise, unstable driving condi-
tions may result.<
Mounting the compact wheel can change the
driving characteristics. For example, it can
reduce tracking stability during braking, extend
braking distances, and alter self-steering char-
acteristics in the limit range. With winter tires,
these characteristics are more pronounced.
Only one compact wheel may be
mounted. You should re-equip with
wheels and tires of the original size as quickly as
possible.<
Vehicle battery
Maintenance
The battery is 100 % maintenance-free, i.e., the
electrolyte will last for the life of the battery
when the vehicle is operated in a temperate cli-
mate. Your BMW Sports Activity Vehicle Center
will be happy to advise you on all questions con-
cerning the battery.
Warning lamp
The warning lamp lights up. The battery
is no longer being charged. The alterna-
tor V-belt is defective or there is a mal-
function in the charge current circuit of the
alternator. Have the system checked immedi-
ately.

Reference
At a glance
Controls
Driving tips
Mobility
127
Tire replacement89
Tires
– age88
– breaking-in76
– changing89
– changing, refer to Wheel
changes103
– coding88
– condition89
– damage89
– DOT Quality Grades88
– flat103
– inflation pressure86
– inflation pressure table87
– size, refer to The right
wheels and tires90
– storage90
– temperature89
– traction88
– tread89
– tread wear88
– Uniform Tire Quality
Grading88
– wear indicators, refer to
Minimum tread depth89
– winter tires90
Tools, refer to Onboard tool
kit99
Torque
– engine114
– lug bolts105
Touch signaling39
Tow bar110
Tow fitting109
Towing109
– with automatic
transmission109
Towing eye109
Towing the vehicle109
Tow rope110
Tow sockets for tow
fitting109
Tow starting109
TPM Tire Pressure
Monitor52
Track width, refer to
Dimensions115
Traction88Traction aid, refer to DSC48
Traction control, refer to DSC
Dynamic Stability
Control48
Transmission
– automatic transmission with
Steptronic38
– manual transmission38
Transmission locking
mechanism, refer to
PPark38
Transmission malfunction,
refer to Malfunction39
Transporting children
safely33
Transport securing device,
refer to Securing cargo79
Traveling on poor roads80
Tread depth, refer to Minimum
tread depth89
Tread wear88
Tread wear indicator in tires,
refer to Minimum tread
depth89
Trip-distance counter, refer to
Trip odometer43
Trip odometer43
Trunk, refer to Cargo area70
Trunk lid, refer to Liftgate21
Turning circle, refer to
Dimensions115
Turn signals39
– indicator lamp12
– replacing bulbs101
– side, replacing bulbs101
U
Units45
– outside temperature45
Universal garage-door
opener, refer to Integrated
universal remote control65
Universal remote control65
Unlocking
– from inside20
– from outside19
– hood92Upholstery care, refer to
Caring for your vehicle
brochure
V
Valve screw caps, refer to
After mounting105
Vehicle
– battery105
– breaking-in76
– care, refer to Caring for your
vehicle brochure
– cargo loading78
– dimensions115
– disposal, refer to Caring for
your vehicle brochure
– locking from inside20
– locking from outside19
– parking37
– washing, refer to Caring for
your vehicle brochure
– weights116
Vehicle battery105
Vehicle jack103
– jacking points104
Vehicle Memory32
Ventilation61,64
– draft-free61,64
Viscosity95
Voice control, refer to
separate Owner's Manual
W
Warning and indicator
lamps12
Warning triangle107
Warranty, refer to Service and
Warranty Information
Booklet for US models,
Warranty and Service Guide
Booklet for Canadian
models97
Warranty and service7
Washer fluid41
Washer fluid reservoir,
capacity, refer to Filling
capacities116