BMW X3 2018 Owners Manual

relevant table on the following pages. Otherjwise, tire damage and accidents could occur.'

Tire sizePressure specifications
in bar/PSIRear: 275/35 R 21
103 Y XL RSC-2.9 / 42Emergency wheel:
T 135/80 R 18
104 MSpeed up to a max. of
50 mph / 80 km/h
4.2 / 60
Tire
identification
marks
Tire
size 245/45 R 18 96 Y
245: nominal width in mm
45: aspect ratio in %
R: radial tire code
18: rim diameter in inches 96: load rating, not for ZR tires
Y: speed rating, before the R on ZR tires
Maximum
tire
load
Maximum tire load is the maximum permissible
weight for which the tire is approved.
Locate the maximum tire load on the tire sidejwall and the Gross Axle Weight Rating m GAWR
m on the certification label on the driver door B-
pillar. Divide the tire load by 1.1. It must be greater than one-half of the vehicless GrossAxle Weight Rating m GAWR. Note, front vs.
rear GAWR and tire loads, respectively.
Speed
letter
Q  up to 100 mph/160 km/h
R  up to 106 mph/170 km/h
S  up to 112 mph/180 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 DOT code: DOT xxxx xxx 3817
xxxx: manufacturer code for the tire brand
xxx: tire size and tire design
3817: tire age
Tires with DOT codes meet the guidelines of
the U.S. Department of Transportation.
Tire
age
Recommendation Regardless of the tire tread, replace tires at
least every 6 years.
Manufacture
date
You can find the manufacture date of the tire
on the tire's sidewall.DesignationManufacture dateDOT 

ernment test course. E.g., a tire graded 150
would wear one and one-half, 1 g, times as well
on the government course as a tire graded
100. The relative performance of tires depends
upon the actual conditions of their use, howj ever, and may depart significantly from the
norm due to variations in driving habits, service
practices and differences in road characterisj tics and climate.
Traction The traction grades, from highest to lowest,are AA, A, B, and C.
Those grades represent the tire's ability to
stop on wet pavement as measured under
controlled conditions on specified government test surfaces 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, cornering,
hydroplaning, or peak traction characteristics.
Temperature
The temperature grades are A, the highest, B, and C, representing the tire's resistance to the
generation of heat and its ability to dissipate heat when tested under controlled conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the maj
terial of the tire to degenerate and reduce tire
life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds to a level of performance which all passenger
vehicle tires must meet under the Federal Moj
tor Vehicle Safety Standard No. 109. Grades
Band A represent higher levels of performance
on the laboratory test wheel than the minimum
required by law.
WARNING
The temperature grade for this tire is esj
tablished for a tire that is properly inflated and
not overloaded. Excessive speed, underinflaj
tion, or excessive loading, either separately orin combination, can cause heat buildup and
possible tire failure.'

Tire
damage
General
information Inspect your tires regularly for damage, foreignobjects lodged in the tread, and tread wear.
Driving over rough or damaged road surfaces, as well as debris, curbs and other obstaclescan cause serious damage to wheels, tires andsuspension parts. This is more likely to occur
with low-profile tires, which provide less cushj
ioning between the wheel and the road. Be
careful to avoid road hazards and reduce your
speed, especially if your vehicle is equipped
with low-profile tires.
Indications of tire damage or other vehicle malj functions:'yUnusual vibrations.'yUnusual tire or running noises.'yUnusual handling such as a strong tenjdency to pull to the left or right.
Damage can be caused by the following situajtions, for instance:
'yDriving over curbs.'yRoad damage.'yTire inflation pressure too low.'yVehicle overloading.'yIncorrect tire storage.
Safety
information
WARNING
Damaged tires can lose tire inflation
pressure, which can lead to loss of vehicle control. There is a risk of an accident. If tiredamage is suspected while driving, immedijately reduce speed and stop. Have wheels andtires checked. For this purpose, drive carefully
to the nearest dealerss service center or anj
other qualified service center or repair shop.
Have vehicle towed or transported as needed.
Do not repair damaged tires, but have them rej
placed.'

WARNING
Incorrect wheel/tire combinations will
have a negative impact on the vehicle's hanj dling and on the function of a variety of sysj
tems, such as ABS or DSC. There is a risk of
an accident. To maintain good handling and
vehicle response, use only tires with a single
tread configuration from a single manufacturer.
The manufacturer of the vehicle recommends
that you use wheels and tires that have been
recommended by the vehicle manufacturer for your vehicle type. Following tire damage, have
the original wheel/tire combination remounted
on the vehicle as soon as possible.'

Rotating the tires is not permissible on vehij
cles with different tire sizes or rim sizes on the
front and rear axles.
Storing
tires
Air
pressure
Do not exceed the maximum tire inflation presj sure indicated on the side wall of the tire.
Storage Store wheels and tires in a cool, dry and dark
place.
Always protect tires against all contact with oil, grease, and solvents.
Do not leave tires in plastic bags.
Remove dirt from wheels or tires.
Run-flat
tires
Concept
Run-flat tires permit continued driving under restricted conditions even in the event of a
complete loss of tire inflation pressure.
General
information
The wheels consist of tires that are self-supj
porting, to a limited degree, and possibly spej cial rims.
The support of the sidewall allows the tire to
remain drivable to a restricted degree in the
event of a tire inflation pressure loss.
Follow the instructions for continued drivingwith a flat tire.
Safety
information WARNING
Your vehicle handles differently with a
run-flat with no or low inflation pressure; for inj stance, your lane stability when braking is rej
duced, braking distances are longer and theself-steering properties will change. There is a
risk of an accident.
Drive moderately and do not exceed a speed of 50 mph/80 km/h.'

side the immediate area in a safe place,
such as behind a guardrail.'yIf necessary, set up a warning triangle at an
appropriate distance.
Mobility
System
Concept
With the Mobility System, minor tire damage can be sealed temporarily to enable continued
travel. To accomplish this, sealant is pumped
into the tires, which seals the damage from the inside.
General
information
'yFollow the instructions on using the Mobij lity System found on the compressor and
sealant container.'yUse of the Mobility System may be ineffecj
tive if the tire puncture measures approx.
1/8 inches/4 mm or more.'yContact a dealerss service center or anj other qualified service center or repair
shop if the tire cannot be made drivable.'yIf possible, do not remove foreign bodies that have penetrated the tire. Only remove
foreign objects if they are visibly protruding from the tire.'yPull the speed limit sticker off the sealant
container and apply it to the steering
wheel.'yThe use of a sealant can damage the TPM wheel electronics. In this case, have theelectronics checked and replaced at the
next opportunity.'yThe compressor can be used to check the
tire inflation pressure.Overview
Storage
The Mobility System is located in the compartj
ment under the cargo floor panel.
Fold up the cargo floor panel.
Sealant
container
'ySealant container, arrow 1.'yFilling hose, arrow 2.
Observe use-by date on the sealant container.
Compressor
1Sealant container unlocking2Sealant container holderSeite 277Wheels
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3Tire pressure gage4Reduce tire inflation pressure button5On/off switch6Compressor7Connector/cable for socket8Connection hose
Safety
measures
'yPark the vehicle as far away as possible
from passing traffic and on solid ground.'ySwitch on the hazard warning system.'ySecure the vehicle against rolling away by setting the parking brake.'yTurn the steering wheel until the frontwheels are in the straight-ahead position
and engage the steering wheel lock.'yHave all vehicle occupants get out of the vehicle and ensure that they remain outjside the immediate area in a safe place,
such as behind a guardrail.'yIf necessary, set up a warning triangle at an
appropriate distance.
Filling
the
tire
with
sealant
Safety
information DANGER
If the exhaust pipe is blocked or ventilaj
tion is insufficient, harmful exhaust gases can
enter into the vehicle. The exhaust gases conj tain pollutants which are colorless and odorj
less. In enclosed areas, exhaust gases can also
accumulate outside of the vehicle. There is
danger to life. Keep the exhaust pipe free and
ensure sufficient ventilation.'

4.Screw the filling hose of the sealant conjtainer onto the tire valve of the nonworking
wheel.5.With the compressor switched off, insert
the plug into the power socket inside the
vehicle.6.With standby state switched on or the enj gine running, switch on the compressor.
Let the compressor run for max. 10 minutes tofill the tire with sealant and achieve a tire inflaj
tion pressure of approx. 2.5 bar.
While the tire is being filled with sealant, the
tire inflation pressure may sporadically reach
approx. 5 bar. Do not switch off the compresj
sor at this point.
Checking
and
adjusting
the
tire
inflation
pressure
Checking1.Switch off the compressor.2.Read the tire inflation pressure on the tire pressure gage.
To continue the trip, a tire inflation pressure of
at least 2 bar must be reached.
Removing
and
stowing
the
sealant
container
1.Unscrew the filling hose of the sealant conj
tainer from the tire valve.2.Press the red unlocking device.3.Remove the sealant container from the
compressor.4.Wrap and store the sealant container in suitable material to avoid dirtying the cargo
area.
Minimum
tire
inflation
pressure
is
not
reached
1.Pull the connector out of the power socket inside the vehicle.2.Drive 33 ft/10 m forward and back to disjtribute the sealant in the tire.3.Screw the connection hose of the comjpressor directly onto the tire valve stem.Seite 279Wheels
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4.Insert the connector into the power socket
inside the vehicle.5.With standby state switched on or the enj gine running, switch on the compressor.
If a tire inflation pressure of at least 2 bar
cannot be reached, contact your dealerss
service center or another qualified service
center or repair shop.
If a tire inflation pressure of at least 2 bar is
reached, see Minimum tire inflation presj
sure is reached.6.Unscrew the connection hose of the comj pressor from the tire valve.7.Pull the connector out of the power socketinside the vehicle.8.Stow the Mobility System in the vehicle.
Minimum
tire
inflation
pressure
is
reached
1.Unscrew the connection hose of the comj pressor from the tire valve.2.Pull the connector out of the power socketinside the vehicle.3.Stow the Mobility System in the vehicle.4.Immediately drive approx. 5 miles/10 km toensure that the sealant is evenly distribj
uted in the tire.
Do not exceed a speed of 50 mph/80 km/h. If possible, do not drive at speeds less than
12 mph/20 km/h.Adjustment1.Stop at a suitable location.2.Screw the connection hose of the comj pressor directly onto the tire valve stem.3.Insert the connector into the power socket
inside the vehicle.4.Correct the tire inflation pressure to at least 2.0 bar.'yIncrease tire inflation pressure: with
standby state switched on or the enj
gine running, switch on the compresj sor.'yReduce tire inflation pressure: press
the button on the compressor.5.Unscrew the connection hose of the comj pressor from the tire valve.6.Pull the connector out of the power socketinside the vehicle.7.Stow the Mobility System in the vehicle.
Continuing
the
trip
Do not exceed the maximum permissible
speed of 50 mph/80 km/h.
Reinitialize the run-flat tires, refer to page 288.
Seite 280MobilityWheels
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