
Controls, Instruments
103
TPC
Tire pressure monitoringfPlease observe the chapter “TIRES, RIMS,
TRACKS” on Page 282.
The tire pressure monitoring continuously
monitors tire pressure and tire temperature on all
four wheels and warns the driver when the tire
pressure is too low.
The display as well as the settings for the tire
pressure monitoring take place on the on-board
computer.
However, you must still adjust the tire pressure on
the wheel.
fThe driver is responsible for filling the tires
correctly and making the correct settings on
the on-board computer.
The tire pressure monitoring offers the following
functions:
– Display of the actual tire pressure while the
vehicle is in motion
– Display of the deviation from the required
pressure (refilling pressure)
– Display of currently set tire size and type
– Tire pressure warnings in two stages
Safety notes!
Despite the advantages offered by the tire
pressure monitoring, it is still the driver’s
responsibility to update the corresponding
settings in the on-board computer and
maintain the pressure in the tires. Low tire
pressure reduces the road safety of the
vehicle and destroys the tire and wheel.
fWhen a flat tire has been displayed, immedi-
ately stop in a suitable place and check the
tires for damage. If necessary, remedy the
damage with a tire sealant.
fDo not by any means continue to drive with
defective tires.
fSealing the tire with tire sealant is only an
emergency repair, so you can drive to the next
authorized Porsche dealer. The maximum per-
mitted speed is 50 mph (80 km/h).
fDo not drive with tires whose tire pressure
drops again in a short period of time. In cases
of doubt, have tires checked by an authorized
Porsche dealer.
fDefective tires must be immediately replaced
by an authorized Porsche dealer.
Tire repairs are not permissible under any
circumstances.fIf the tire pressure monitoring is defective (e.g.
defective wheel transmitter), contact an
authorized Porsche dealer immediately and
have the damage repaired.
The tire pressure will not be monitored by a
defective tire pressure monitoring.
fTires lose air over time without a tire defect
being present. A tire pressure warning will then
appear in the on-board computer display.
Correct the tire pressure at the next oppor-
tunity.
fThe tire pressure monitoring gives a warning
about tire damage due to natural pressure loss
as well as about a gradual loss of pressure due
to foreign objects.
The tire pressure monitoring cannot warn you
about tire damage that occurs suddenly (e.g.
flat tire due to abrupt external effects).

Practical Tips, Emergency Service
221
Tires/Wheels The original equipment tires and wheel rims on
your Porsche comply with all applicable Federal
Motor Vehicle Safety Standards.
For your safety remember the following:
– Wheel rims and wheel bolts are matched to fit
your Porsche.
– If you intend to use other than original equip-
ment wheels, be sure that they conform to
Porsche specifications for your model.
Only tires with the same make and with the
same specification code (e.g. “N0”, “N1”...)
can be mounted.
– The use of wheel rims and wheel bolts that do
not meet specifications of the original factory
installed equipment will affect the safe opera-
tion of your vehicle.
– Before you plan on exchanging wheels, or
snow tires already mounted on the wheel rims,
consult your authorized Porsche dealer. Your
dealer has the technical information necessary
to advise you which wheel rims and wheel bolts
are compatible with the original factory instal-
lations.
Danger!
Risk of loss of control and serious personal
injury or death.
fIf while driving, your vehicle experiences a sud-
den vibration or ride disturbance, and/or you
suspect that possible damage to your tires or
vehicle has occurred, you should immediately
reduce your speed without excessive use of
the brakes.
fStop the vehicle as soon as possible, and in-
spect the tires.
If you cannot determine the cause for the dis-
turbance, have your vehicle towed to the near-
est Porsche or tire dealer to have your vehicle
or tire(s) inspected.
fContinuing to operate the vehicle without cor-
rection could result in a loss of control and se-rious personal injury.

228
Practical Tips, Emergency Service
Tire care fAvoid damaging tires and wheel rims.
fIf you must drive over a curb or other obstacle,
drive slowly and at an obtuse angle.
fCheck tires for uneven wear and damage
before driving off.
fRemove imbedded material.
fReplace worn or damaged tires immediately.
fKeep oil, fuel, brake fluid, etc. away from tires.
fReplace missing valve stem caps.
fKeep tires inflated correctly.
fWash tires when washing the vehicle.
Also clean inner side of wheels.
fDo not use abrasive cleaners when washing
the wheels.
fCheck wheel rims for corrosion.
fRemove road salt, if driving in winter.
Tire damage, puncture fCheck tires for imbedded material, cuts, punc-
tures, cracks and bulges (side wall) before driv-
ing off.
In case of tire damage, where it is uncertain wheth-
er there is a break in the ply with all its conse-
quences or tire damage caused by thermal or me-
chanical overloading due to loss of pressure or
any other prior damage, we recommend that the
tire be replaced for safety reasons.
I f o n e f a u l t y t i re i s re p l a c e d i t s h o u l d b e n o t e d t h a t
the difference in tread depth on one axle must not
exceed 30 %.
Handling inconsistencies may result.
fPerform a visual inspection if necessary.
Danger!
Risk of serious personal injury or death.
Driving the vehicle with low tire pressure
increases risk of a tire failure and resulting
loss of control. Furthermore, low tire pres-
sure increases rate of wear of the affected
tires.
fCheck tires – including sidewalls – regularly for
foreign bodies, nicks, cuts, cracks and bulges.
fAfter driving off road, examine tires for signs
of damage such as cuts, tears, bulges or for-
eign objects stuck in the tread. Replace a dam-
aged tire if necessary.
fCross curb edges slowly and at right angles if
possible.
Avoid driving over steep or sharp curbs.
fIn cases of doubt, have the wheel (particularly
the inner side) checked by an authorized Porsche dealer.

Practical Tips, Emergency Service
235
Loading InformationDefinitionsThe Curb weight - actual weight of your vehicle -
vehicle weight including standard and optional
equipment, fluids and emergency tools. This
weight does not include passengers and cargo.
The Gross Vehicle Weight is sum of the curb
weight and the weight of passengers and cargo
combined.
The Gross Vehicle Weight Rating is the maxi-
mum total weight of vehicle, passengers, luggage
and optional equipment.
The Gross Axle Weight Rating is the maximum
load limit for the front or the rear axle. This infor-
mation is located on the safety compliance sticker
located in the driver’s side door jamb.
For determining the compatibility of the tire and
vehicle load capabilities:
fPlease observe the chapter “TIRES, RIMS,
TRACKS” on Page 282.
The load capacity coefficient (e.g. “101”) is a min-
imum requirement.The Gross Combined Weight Rating is the
maximum total weight rating of vehicle, passen-
gers and cargo.
The Vehicle Capacity Weight - Load Limit - is
the maximum total weight limit specified of the
load (passengers and cargo) for the vehicle. This
is the maximum weight of passengers and cargo
that can be loaded into the vehicle. This informa-
tion can be found on the tire pressure plate.
The maximum loaded vehicle weight is the
sum of curb weight, accessory weight, vehicle ca-
pacity weight and production options weight.
The load rating is the maximum load that a tire
is rated to carry for a given inflation pressure.
The maximum load rating is the load rating for
a tire at the maximum permissble inflation pres-
sure.
The cargo capacity is the permissible weight of
cargo, the substracted weight of passengers from
the load limit.
fNever exceed the permissible limits.
Danger!
Risk of personal injury, loss of control and
damage to vehicle.
fNever exceed the specified axle loads. Over-
loading can shorten the service life of the tires
and car, as well as lead to dangerous vehicle
reactions and long braking distances. Damage
due to overloading is not covered by the vehi-cle warranty.

282
Vehicle Identification, Technical Data
Tires, Rims, Tracks Boxster Tires Rim Rim offset Track
Summer tiresfront 205/55 ZR 17 91Y 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 ZR 17 91Y 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 ZR 18 91Y 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear 265/40 ZR 18 101Y 9 J x 18 H2 43 mm 60.2 in./1528 mm
or front 235/35 ZR 18 87Y 8 J x 19 H2 57 mm 58.5 in./1486 mm
rear 265/35 ZR 19 94Y 9.5 J x 19 H2 46 mm 60.0 in./1522 mm
Snow tiresfront 205/55 R 17 91V M+S 6.5 J x 17 H2 55 mm 58.7 in./1490 mm
rear * 235/50 R 17 96V M+S 8 J x 17 H2 40 mm 60.4 in./1534 mm
or front 235/40 R 18 91V M+S 8 J x 18 H2 57 mm 58.5 in./1486 mm
rear * 255/40 R 18 95V M+S 9 J x 18 H2 43 mm 60.2 in./1528 mm
The load capacity coefficient (e.g. “91”) and maximum speed code letter (e.g. “V”) are minimum requirements.

Index
295
RRadiator fans .............................................. 187
Radio reception .......................................... 155
Rain sensor ................................................ 126
Range on remaining fuel ........................93
, 114
Rear fog light .....................................124, 269
Rear lid ...................................................... 148
Rear spoiler............................................68, 69
Rear view mirrors ......................................... 31
Rear window defogger.................................. 33
Rear wing
Retractable........................................... 68
Relays ........................................................ 246
Release button ........................................... 163
Remote control ............................................. 18
Replacement key .......................................... 17
Replacing bulbs .......................................... 259
Replacing wiper blades................................ 185
Retractable spoiler........................................ 68
Rims
Diameter ............................................ 234
Rim width ........................................... 234
Running in .................................................... 14
SSafety belts ..........................................42
, 217
Warning light ........................................ 43
Safety compliance sticker ........................... 278
Sealing set ................................................. 239
Seals, care of ............................................. 215
Seat ............................................................ 34
Adjustment ........................................... 34
Heating ................................................ 38Memory................................................36
Selector lever .............................................163
Selector lever position indicator ............ 87
, 165
Shifting gear ...............................................162
Shiftlock .....................................................163
Side lights ..................................................269
Side marker light ............................... 124, 268
Side vents ..................................................136
Snow chains .............................. 232
, 283
, 284
Snow tires ......................................... 231, 282
Sockets .....................................................140
Spacers .....................................................244
Spare key .....................................................17
Spare wheel ...............................................284
Speed code letter .......................................233
Speed control .............................. 82
, 129
, 130
Speed limit .......................................... 94, 233
Speedometer................................................84
Spoiler .........................................................68
Fixed ....................................................69
Retractable ...........................................68
Sport mode ..................................... 63
, 66, 67
Sports seat ..................................................34
Stability management system (PSM) ...............64
Starting ................................................. 74, 75
Starting and stopping the engine ....................74
Steering wheel
Adjustment ...........................................39
Buttons ................................................40
Lock ................................. 74
, 75, 76, 77
Rocker switches..................................163
Toggle switches ..................................163
Stopwatch ....................................................98
Storage options ..........................................142
Storing your Porsche..................................218Sun visors ................................................... 41
TTachometer ................................................. 85
Tail light ..................................................... 269
Tank .................................................. 196
, 197
cap ................................................... 197
Ventilation system.............................. 202
Telephone .................................................. 157
Temperature setting........................... 130, 133
Temperature, outside indicator ...................... 89
Test stand, measurements ............................ 66
Theft protection ........................................... 16
Tiptronic .................................................... 163
Indicator .............................................. 87
Tire pressure monitoring ............................. 103
Tires ................................... 14
, 221
, 282
, 283
Checking pressure............................. 241
Inscription .......................................... 233
Loading information ............................ 235
Pressure................................ 5
, 224
, 283
Pressure plate.................................... 279
Sealant .............................................. 239
Sidewall ............................................. 233
Size .................................................. 233
Tires and tire care ...................................... 221
Tools ......................................................... 152
Towing .............................................. 274, 275
Track ........................................................ 282
Transmission ............................. 161
, 162
, 281
Fluid .......................................... 208, 286
Trunk entrapment ....................................... 148
Turn signals ......................................... 85, 125