2012 Seat Mii inflation pressure

214Vehicle care and maintenance
Note
If you use tyres that are approved by SEAT, you can be sure that the true tyre
dimensions will be correct for your vehicle. For other tyre models, the tyre
vendor should provide the manufacturer's certificate with the tyre, indicat-
ing that this type of tyre is suitable for your vehicle. This certificate should
always be carried with the vehicle. 
Tyre pressures
Fig. 121 Position of tyre pressure specification plate
The correct tyre pressures for tyres fitted at the factory is shown on a label
and is valid for summer and winter tyres. This label ⇒ Fig. 121 is either in
the driver door strut or inside the fuel cap.
Under-inflation or over-inflation will reduce the life of the tyres considerably
and also impair the vehicle's handling ⇒ 
. It is essential to maintain the
correct tyre pressures, especially if driving at high speeds. Incorrect tyre
pressure causes premature wear and could cause tyre blow-out. The pressure should therefore be checked at least once a month and before
starting a journey.
As a general rule, the pressures given are for
cold tyres. When the tyres are
hot, the pressures are greater.
Never deflate a hot tyre in order to obtain the required pressure. This could
result in very low tyre pressures which may lead to sudden blow-outs. 

219
Vehicle care and maintenance
Radial
Rim diameter code
Load index & speed rating
DOT tyre identification number
Severe snow conditions
Tyre ply composition and materials used
Max. load rating
Treadwear, traction and temperature grades
Max. permissible inflation pressure
Passenger vehicle tyre
Nominal width of tyre in millimetres
Ratio of height to width (aspect ratio)
Tyre code (example)MeaningMake, logotypeManufacturerProduct nameName of tyre assigned by manufacturer.P255 / 55 R 18Size:PPassenger vehicle code.255Nominal width between walls, in mm.55Height/width ratio in %RTyre type (R indicates "radial").18Rim diameter in inches109 HLoad index ⇒ page 220 and speed rating
⇒ page 220.
XL(“Reinforced”) tyres.M+S or M/S or Winter tyres code (mud and snow tyres).RADIAL TUBELESSRadial tyre without inner tube.E4 ...E-mark certifying tyre complies with internation-
al legislation followed by a number denoting the
country granting the authorisation. The authori-
sation number ( several digits) is shown below.
123456789101112
Tyre code (example)MeaningDOT BT RA TY5 1709Tyre identification number (TIN a)
, may be only on
interior wall of wheel) and date of manufacture:
DOTThe tyre complies with the legal require-
ments of the US Department of Trans-
port, responsible for tyre safety regula-
tions.
BTPlace of manufacture code.RAInformation about manufacturer and tyre
size.
TY5Manufacturer's tyre specifications.1709Date of manufacture: Week 17 of 2009.TWIThis identifies the position of the Tread Wear In-
dicator ⇒ page 215.
Made in GermanyCountry of manufacture.MAX LOAD 615 KGUS load rating, indicating maximum permitted
load per tyre.
MAX INFLATION 350 KPA
(51 PSI)US limit, indicating maximum permitted tyre
pressure.
SIDEWALL 1 PLY RAYONInformation about tyre wall components:
1 layer of rayon (artificial silk).
TREAD 4 PLIES
1 RAYON + 2 STEEL +
1 NYLONInformation about tread components:
In the example, there are 4 layers below the
tread: 1 layer of rayon (artificial silk), 2 layers of
steel reinforcement and 1 layer of nylon.
Information for the end consumer concerning the comparative values of
the established base tyres (standardised test procedures) ⇒ page 233:
TREADWEAR 220Relative service life of the tyre, with respect to
specific US standard test.
TRACTION ABraking capacity of tyre on wet surface (AA, A, B
or C).
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data

259
Practical information
● Start the vehicle engine and leave it running.
● Attach the connector ⇒ Fig. 146 9
to a 12 volt socket of the vehicle
⇒ page 117.
● Connect the air compressor with the ON/OFF switch ⇒ Fig. 146 8
.
● Keep the air compressor running until it reaches 2.0 to 2.5 bar
(29-36 psi / 200-250 kPa) ⇒ 
. Maximum operation time 8 minutes ⇒ .
● Disconnect the air compressor.
● If it is not possible to achieve an air pressure of 2.0 to 2.5 bar
(29-36 psi / 200-250 kPa), unscrew the tyre inflator tube from the tyre valve.
● Move the vehicle some 10 metres forwards or backwards so that the
sealant is evenly distributed in the tyre interior.
● Securely screw the compressor tyre inflator tube into the tyre valve and
repeat the inflation process.
● If the indicated pressure can still not be reached, the tyre is too badly
damaged. The tyre cannot be sealed with the anti-puncture kit. Do not con-
tinue driving. You should obtain professional assistance ⇒ 
.
● Disconnect the air compressor and unscrew the flexible inflator tube
from the tyre valve.
● When the tyre pressure is between 2.5 and 2.0 bars, immediately con-
tinue driving without exceeding 80 km/h (50 mph).
● After 10 minutes, Check the pressure again ⇒ page 259.
WARNING
When inflating the wheel, the air compressor and the inflator tube may
become hot.
● Protect hands and skin from hot parts.
● Do not place the hot flexible inflator tube or hot air compressor on
flammable material.
WARNING (Continued)
● Allow them to cool before storing the device.
● If it is not possible to inflate the tyre to at least 2.0 bars (29 psi /
200 kPa), the tyre is too badly damaged. The sealant is not in a good con-
dition to seal the tyre. Do not continue driving. You should obtain profes-
sional assistance.
CAUTION
Switch off the air compressor after a maximum of 8 operational minutes to
avoid overheating! Before switching on the air compressor again, let it cool
for several minutes. 
Check after 10 minutes of driving
Screw the inflator tube ⇒ Fig. 146 5 again and check the pressure on the
gauge 6.
1.3 bar (19 psi / 130 kPa) and lower:
● Stop the vehicle! The tyre cannot be sealed sufficiently with the tyre mo-
bility set.
● You should obtain professional assistance ⇒ 
.
1.4 bar (20 psi / 140 kPa) and higher:
● Set the tyre pressure to the correct value again ⇒ page 210.
● Carefully resume your journey until you reach the nearest specialised
workshop without exceeding 80 km/h (50 mph).
● Have the damaged tyre replaced. 
Vehicle diagramPrior to a journey...While drivingCare, cleaning and mainte-
nanceIf and whenTechnical Data