Tire pressure monitor tpm, Technology for driving comfort and safety – BMW 328i Coupe 2011 User Manual

Page 86

Technology for driving comfort and safety

Indication of a flat tire

The warning lamps come on in yellow
and red. In addition, an acoustic sig-
nal sounds. There is a flat tire or sub-
stantial loss of tire pressure.

What to do in case of a flat tire

Run-flat tires

With a damaged tire, is possible to continue
driving at speeds of up to 50 mph/80 km/h.

Do not continue driving if the vehicle is
not equipped with run-flat tires, refer to

page

142

; continued driving could result in a

severe accident.

When continuing to drive with a damaged tire:

Avoid sudden braking and steering maneu-
vers.

Do not exceed a speed of 50 mph/80 km/h.

At the next opportunity, check the air pres-
sure in all four tires.

If all four tires are inflated to the cor-
rect pressures, the Flat Tire Monitor

might not have been initialized. The system
must then be initialized.

Possible travel distance with complete tire
pressure loss:

With a light load:
1 to 2 persons without luggage:
Approx. 155 miles/250 km

With a medium load:
2 persons, cargo area full, or 4 persons
without luggage:
Approx. 94 miles/150 km

With a full load:
4 persons, cargo area full:
Approx. 30 miles/50 km

Drive cautiously and do not exceed a
speed of 50 mph/80 km/h.

When there is a tire pressure loss, the handling
characteristics change, e.g. there will be
reduced directional stability during braking,
braking distances will be longer, and self-steer-
ing response will change.

Vibrations or loud noises during driving
may indicate the final failure of the tire.

Reduce your speed and bring the vehicle to a
stop; otherwise, tire components may become
detached, which could result in an accident. Do
not continue driving; instead, contact your
BMW center.

Tire Pressure Monitor TPM*

The concept

Check the inflation pressure in the four installed
tires. The system notifies you if there is a signif-
icant loss of pressure in one or more tires.

Functional requirement

The system has to have been reset at the cor-
rect inflation pressure; otherwise, a reliable
reporting of a flat tire is not assured.
Always use wheels with TPM electronics to
assure a trouble-free function of the system.

Each time a tire inflation pressure has
been corrected or a wheel or tire has been

changed, reset the system.

System limitations

It is impossible to provide advance warn-
ing of sudden, severe tire damage caused

by outside influences.

The system does not function correctly if it has
not been reset. For example, a flat tire may be
indicated even though the tire inflation pres-
sures are correct.
The system is inactive and cannot indicate a flat
tire:

when a wheel without TPM electronics is
installed.

when other systems or devices that use the
same radio frequency interfere with TPM.