2002 BMW Z3 width

112n
Tire replacementTractionThe 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 speci-
fied 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 charac-
teristics.<
TemperatureThe 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 condi-
tions on a specified indoor laboratory
test wheel.
Sustained high temperature can cause
the material 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 Motor Vehicle Safety
Standard No. 109. Grades B and A
represent higher levels of performance
on the laboratory test wheel than the
minimum required by law.
The temperature grade for this tire
is established for a tire that is
properly inflated and not overloaded.
Excessive speed, under-inflation, or
excessive loading, either separately or
in combination, can cause heat buildup
and possible tire failure.<
Uniform Tire Quality GradingQuality 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
Do not use retreaded tires as this
could negatively affect driving
safety. This is due to the possible varia-
tions in casing structures and, in some
cases, to their extreme age, factors
which can lead to a decrease in their
durability.<

114n
Wheel and tire combinationsThe right choice
Use only wheels and tires
approved by BMW for the corre-
sponding vehicle model, as otherwise
the tires may make contact with the
body as the result of tolerances despite
the same nominal size being used,
resulting in serious accidents. If non-
approved wheels and tires are used,
BMW cannot evaluate their suitability,
and therefore cannot be held liable for
driving safety.<
For wheel and tire specifications
approved by BMW, refer to the informa-
tion beginning on page 116.
The correct wheel and tire combi-
nation affects different systems
such as ABS and ASC+T/DSC
*. The
function of these systems is impaired if
improper wheel and tire combinations
are used.
For this reason, use only tires of the
same manufacture and tread configura-
tion. In the event of a flat tire, for
example, remount the approved wheel
and tire combination as soon as
possible.<
Codes on tires and wheelsThe code on the tires has the following
meaning.
Codes on radial tires:
The speed rating indicates the
approved maximum speed for the tire.
Summer tires:
S = up to 112 mph (180 km/h)
T = up to 118 mph (190 km/h)
H = up to 130 mph (210 km/h)
V = up to 149 mph (240 km/h)
W = up to 167 mph (270 km/h)
Y = up to 186 mph (300 km/h)
ZR = over 149 mph (240 km/h) Example:
Nominal width
in mm
Aspect ratio in %
Belt rating ID code
for radial tires
Wheel diameter in inches
Load rating
(not on ZR tires)
Speed rating
(before R on ZR tires)
205/60 R 15 91 H
All season and winter tires:
Q M+S = up to 100 mph (160 km/h)
T M+S = up to 118 mph (190 km/h)
H M+S = up to 130 mph (210 km/h)
Codes on light-alloy wheels:
Protect valve inserts against dirt by
using screw-on valve caps. Dirt in the
valve inserts frequently causes a slow
loss in tire pressure.Storage Store tires in a cool, dry place,
protecting them against light whenever
possible. Protect the tires against
contact with oil, grease and fuel. Example:
Rim width
in inches
Code letter for
flange type
Symbol for full-drop
center rim
Rim diameter in inches
Hump on the 2 rim shoulders
7x15H2
J

171n
IndexDataTechnologyRepairsMaintenanceControlsOverview
Z3 roadster 2.5i, 3.0i Z3 coupe 3.0i
Length in (mm) 159.4 (4,050) 158.5 (4,025)
Width in (mm) 68.5 (1,740) 68.5 (1,740)
Height (unloaded) in (mm) 50.9 (1,293) 51.4 (1,306)
Wheelbase in (mm) 96.3 (2,446) 96.3 (2,446)
Track, front in (mm) 55.6 (1,413) 55.6 (1,413)
Track, rear in (mm) 58.8 (1,494) 58.8 (1,494)
Min. turning circle dia. ft (m) 32.8 (10.0) 32.8 (10.0)
Dimensions

Everything from A to ZTrack width171
Traction Control System
refer to ASC+T/DSC
Transmission61, 62
Tread depth, tires111
Trip odometer68
Turn signals23, 64
bulb replace-
ment138t, 139t
Turning circle171
Two-way radios107UUniform Tire Quality
Grading112
Use of antifreeze126t
Used batteries154tVVacuum cleaner,
connecting92
Valve caps114
Vanity mirrors51
Vehicle battery153, 174
Vehicle Identification
Number127
Vehicle immobilizer31Vehicle jack146t
Vehicle keys30
Vehicle storage130
Ventilation80, 84
outlets80, 84
Ventilation, draft-free82, 87
Vents80, 84
Viscosity124
WWarm feet Ð cool
head82, 87
Warning lamps20
Warning triangle24
Warranty and Service Guide
Booklet (Canadian
models)129
Washer fluid, adding122t
Washer nozzles,
adjusting122t
Washer reservoir,
filling122t
Washers, headlamp66
Washing your vehicle, refer
to the "Caring for your
vehicle" manualWaxing your vehicle, refer to
the "Caring for your
vehicle" manual
Weights172
Wheel change146t
Wheelbase171
Wheels and tires114
Width171
Windows, convenience
closing mode32
Windshield washer122
filling reservoir122t
nozzles122
Windshield wipers65
blade replacement136t
Winter driving105
Winter tires115
Wiper blade
replacement136t
Wipers65
Wiper/Washer system65
Working in the engine
compartment118t