2021 BMW 3 SERIES Owners Manual

Warning
If
a
rear
seat
backrest
is
not
locked,
unsecured cargo
can
be
thrown
about
the
car#ss
interior;
for
instance,
in
the
event
of
an
accident,
braking or
an
evasive
maneuver.
There
is
a
risk
of
injury.
Make
sure
that
the
rear
seat
backrest
is
locked
after
folding
it
back.
Warning
The
stability
of
the
child
restraint
system
is
lim#j
ited
or
compromised
with
incorrect
seat
adjust#j
ment
or
improper
installation
of
the
child
seat.
There
is
a
risk
of
injuries
or
danger
to
life.
Make
sure
that
the
child
restraint
system
fits
securely against
the
backrest.
If
possible,
adjust
the
backrest
tilt
for
all
affected
backrests
and
cor#j
rectly
adjust
the
seats.
Make
sure
that
seats
and
backrests
are
securely
engaged
or
locked.
If
possible,
adjust
the
height
of
the
head
re#j
straints
or
remove
them.
NOTICE
Vehicle
parts
can
be
damaged
when
folding down
the
rear
backrest.
There
is
a
risk
of
dam#j age
to
property.
Make
sure
that
the
area
ofmovement
of
the
rear
backrest
including
headrestraint
is
clear
when
folding
down.
Folding
down
the
rear
seat
backrest
from
the
cargo
area1.Unlock
the
belt
lock
of
the
center
safety
belt
in
the
rear
using
the
latch
plate
of
another safety
belt.2.Insert
the
latch
plate
at
the
end
of
the
beltinto
the
specially
designated
fixture
on
therear
window
shelf.3.Push
the
corresponding
head
restraint
downas
far
as
it
will
go.4.Pull
the
corresponding
lever
in
the
cargo
areato
release
the
rear
seat
backrest.
The
un#jlocked
rear
seat
backrest
moves
forward
slightly.5.Fold
the
rear
seat
backrest
forward.Seite
297Cargo
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Folding
back
the
backrest
Return
the
rear
seat
backrest
to
the
seat
position
and
engage
it.
Folding
down
the
center
section1.Fold
down
the
center
head
restraint.2.Pull
lever
and
fold
the
center
section
forward.
With
an
emergency
wheel:enlarging
the
cargo
area
Concept
The
emergency
wheel
and
any
related
compo#j nents
can
be
temporarily
removed
to
enlarge
the cargo
area.
Removing
the
emergency
wheel
and
the
storage
compartments
1.To
remove
the
cargo
area
floor,
pull
it
upward directly
behind
the
rear
backrests.2.Remove
tool
holder
and
emergency
wheel,
refer
to
page
344.3.Loosen
the
ratchet
strap
from
the
lashing
eyes.4.Remove
the
storage
compartment.5.Remove
the
storage
well.6.Insert
the
cargo
floor
panel.
Inserting
the
emergency
wheel
and
the
storage
compartments
Proceed
in
reverse
order
to
insert
the
emergencywheel
and
the
storage
compartments.
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Seite
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Things
to
remember
when
drivingVehicle
features
andoptions
This
chapter
describes
all
standard,
country-spe#jcific
and
optional
features
offered
with
the
series. It
also
describes
features
and
functions
that
are
not
necessarily
available
in
your
vehicle,
e.g.,
due to
the
selected
options
or
country
versions.
Thisalso
applies
to
safety-related
functions
and
sys#j
tems.
When
using
these
functions
and
systems,
the
applicable
laws
and
regulations
must
be
ob#j
served.
Breaking-in
period
General
information Moving
parts
need
to
begin
working
together
smoothly.
The
following
instructions
will
help
you
to
ach#j ieve
a
long
vehicle
life
and
good
efficiency.
During
break-in,
do
not
use
the
Launch
Control.
Safety
information
Warning
Due
to
new
parts
and
components,
safety
and driver
assistance
systems
can
react
with
a
de#j
lay.
There
is
a
risk
of
accident.
After
installing new
parts
or
with
a
new
vehicle,
drive
conser#jvatively
and
intervene
early
if
necessary.
Ob#j
serve
the
break-in
procedures
of
the
respective parts
and
components.
Engine,
transmission,
and
axle
drive
Up
to
1,200
miles/2,000
km
Do
not
exceed
the
maximum
engine
and
road
speed:'xFor
gasoline
engine
4,500
rpm
and
100
mph/160
km/h.
Avoid
full
load
or
kickdown
under
all
circumstan#j ces.
From
1,200
miles/2,000
km
The
engine
and
vehicle
speed
can
gradually
be increased.
Tires Tire
traction
is
not
optimal
due
to
manufacturing
circumstances
when
tires
are
brand-new;
they achieve
their
full
traction
potential
after
a
break-intime.
Drive
conservatively
for
the
first
200
miles/300
km.
Brake
system Brake
discs
and
brake
pads
only
reach
their
full
effectiveness
after
approx.
300
miles/500
km. Drive
moderately
during
this
break-in
period.
Following
part
replacement Observe
the
break-in
procedures
again,
if
com#j
ponents
mentioned
above
are
replaced.
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General
driving
notes
Closing
the
trunk
lid
Safety
information
Warning
An
open
trunk
lid
protrudes
from
the
vehicle and
can
endanger
occupants
and
other
trafficparticipants
or
damage
the
vehicle
in
the
event
of
an
accident,
braking
or
evasive
maneuvers.
In
addition,
exhaust
fumes
may
enter
the
vehi#j
cle
interior.
There
is
a
risk
of
injury
or
risk
of damage
to
property.
Do
not
drive
with
the
trunklid
open.
Driving
with
the
trunk
lid
open
If
driving
with
the
tailgate
open
cannot
beavoided:
'xClose
all
windows
and
the
glass
sunroof.'xGreatly
increase
the
air
flow
from
the
vents.'xDrive
moderately.
Hot
exhaust
gas
system
Warning
High
temperatures
can
occur
underneath
the body,
for
instance
caused
by
the
exhaust
gassystem,
while
driving.
Contact
with
the
exhaust
gas
system
can
cause
burns.
There
is
a
risk
of
injury.
Do
not
touch
the
hot
exhaust
gas
sys#j tem,
including
the
exhaust
pipe.
Warning
If
combustible
materials,
such
as
leaves
or
grass,
come
in
contact
with
hot
parts
of
the
ex#j
haust
gas
system,
these
materials
can
ignite.
There
is
a
risk
of
fire
and
injuries.
Do
not
re#j move
the
heat
shields
installed
and
never
apply
undercoating
to
them.
Make
sure
that
no
com#j
bustible
materials
can
come
in
contact
with
hot
vehicle
parts
in
driving
operation,
idle
or
during
parking.
Mobile
communication
devices
in
the
vehicle
Warning
Vehicle
electronics
and
mobile
phones
can
in#j
fluence
one
another.
There
is
radiation
due
to
the
transmission
operations
of
mobile
phones.
There
is
a
risk
of
injury
or
risk
of
damage
to
property.
If
possible,
in
the
car's
interior
use
only
mobile
phones
with
direct
connections
to
an
exterior
antenna
in
order
to
exclude
mutual
interference
and
deflect
the
radiation
from
the
car's
interior.
Hydroplaning
On
wet
or
slushy
roads,
a
wedge
of
water
can
form
between
the
tires
and
road
surface.
This
phenomenon
is
referred
to
as
hydroplaning.
It
is
characterized
by
a
partial
or
complete
loss
of
contact
between
the
tires
and
the
road
surface,
ultimately
undermining
your
ability
to
steer
and
brake
the
vehicle.
Driving
through
water
General
information When
driving
through
water,
follow
the
following:
'xDeactivate
Auto
Start/Stop
function.'xDrive
through
calm
water
only.'xDrive
through
water
only
if
it
is
not
deeper
than
maximum
9.8
inches/25
cm.'xDrive
through
water
no
faster
than
walking
speed,
up
to
3
mph/5
km/h.Seite
301Things
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Safety
information
NOTICE
When
driving
too
quickly
through
too
deep
wa#j
ter,
water
can
enter
into
the
engine
compart#j ment,
the
electrical
system
or
the
transmission.There
is
a
risk
of
damage
to
property.
When
driving
through
water,
do
not
exceed
the
maxi#j mum
indicated
water
level
and
the
maximum
speed
for
driving
through
water.
Braking
safely
General
information The
vehicle
is
equipped
with
an
Antilock
Braking
System
ABS
as
a
standard
feature.
Perform
an
emergency
stop
in
situations
that
re#j
quire
such.
Steering
is
still
responsive.
You
can
still
avoid
any
obstacles
with
a
minimum
of
steering
effort.
Pulsation
of
the
brake
pedal
and
sounds
from
the
hydraulic
circuits
indicate
that
the
Antilock
Brak#j ing
System
ABS
is
in
its
active
mode.
In
certain
braking
situations,
the
perforated
brake
discs
can
emit
functional
noises.
However,
func#j
tional
noises
have
no
effect
on
the
performance
and
operational
reliability
of
the
brake.
Objects
in
the
area
around
the
pedals
Warning
Objects
in
the
driver's
floor
area
can
limit
the pedal
distance
or
block
a
depressed
pedal.
There
is
a
risk
of
accident.
Stow
objects
in
the vehicle
such
that
they
are
secured
and
cannotenter
into
the
driver's
floor
area.
Use
floor
matsthat
are
suitable
for
the
vehicle
and
can
be
safely
attached
to
the
floor.
Do
not
use
loose
floor
mats
and
do
not
layer
several
floor
mats. Make
sure
that
there
is
sufficient
clearance
for
the
pedals.
Ensure
that
the
floor
mats
are
se#j
curely
fastened
again
after
they
were
removed,
for
instance
for
cleaning.
Driving
in
wet
conditions
When
roads
are
wet,
salted,
or
in
heavy
rain,
gen#j
tly
press
the
brake
pedal
every
few
miles.
Ensure
that
this
action
does
not
endanger
other
traffic.
The
heat
generated
during
braking
dries
brake discs
and
brake
pads
and
protects
them
againstcorrosion.
In
this
way
braking
efficiency
will
be
available when
you
need
it.
Hills General
information
Drive
long
or
steep
downhill
gradients
in
the
gear
that
requires
least
braking
effort.
Otherwise,
the
brakes
may
overheat
and
reduce
brake
effi#j
ciency.
You
can
increase
the
engine's
braking
effect
by shifting
down,
going
all
the
way
to
first
gear,
if
needed.
Safety
information
Warning
Light
but
consistent
brake
pressure
can
lead
to
high
temperatures,
brakes
wearing
out
and possibly
even
brake
failure.
There
is
a
risk
of
accident.
Avoid
placing
excessive
stress
on
the
brake
system.
Warning
In
idle
state
or
with
the
engine
switched
off,
safety
functions,
for
instance
engine
braking
ef#j fect,
braking
assistance
and
steering
assis#jtance,
may
not
be
available.
There
is
a
risk
ofaccident.
Do
not
attempt
to
drive
in
idle
state
or
with
the
engine
switched
off.
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Brake
disc
corrosion
Corrosion
on
the
brake
discs
and
contamination
on
the
brake
pads
are
increased
by
the
following
circumstances:'xLow
mileage.'xExtended
periods
when
the
vehicle
is
not
used
at
all.'xInfrequent
use
of
the
brakes.'xAggressive,
acidic,
or
alkaline
cleaning
agents.
Corrosion
buildup
on
the
brake
discs
will
cause
a pulsating
effect
on
the
brakes
in
their
response
-
generally
this
cannot
be
corrected.
Condensation
water
under
the
parked
vehicle
When
using
the
automatic
climate
control,
con#j
densation
water
develops
and
collects
under#j
neath
the
vehicle.
M340i
with
M
Technology
package:
ground
clearance
NOTICE
If
the
ground
clearance
is
insufficient,
e.g., curbs
or
underground
garage
entrances,
con#j tact
with
vehicle
parts,
e.g.,
spoiler,
and
the
un#j
derbody
may
occur.
There
is
a
risk
of
damage to
property.
Ensure
that
there
is
sufficientground
clearance
available.
Roof-mounted
luggage
rack
General
information Roof
racks
are
available
as
special
accessories.
Safety
information
Warning
When
driving
with
a
roof
load,
for
instance
with
roof-mounted
luggage
rack,
the
vehicle's
cen#j
ter
of
gravity
is
higher,
which
increases
the
risk of
the
vehicle
tipping
in
critical
driving
situa#j
tions.
There
may
be
a
risk
of
accident
or
risk
of damage
to
property.
Do
not
deactivate
DSC
Dynamic
Stability
Control
when
driving
with
roof
load.
Roof
drip
rail
with
flaps
The
fixing
points
are
located
in
the
roof
drip
rail
above
the
doors.
Fold
the
cover
outward.
Mounting
Follow
the
installation
instructions
of
the
roof rack.
Be
sure
that
adequate
clearance
is
maintained for
tilting
and
opening
the
glass
sunroof.
Loading Because
roof-mounted
luggage
racks
raise
thevehicle's
center
of
gravity
when
loaded,
they
have
a
major
effect
on
vehicle
handling
and
steering
response.
Therefore,
note
the
following
when
loading
and driving:
'xDo
not
exceed
the
approved
roof/axle
loads and
the
approved
gross
vehicle
weight.Seite
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'xBe
sure
that
adequate
clearance
is
main#j
tained
for
tilting
and
opening
the
glass
sun#j
roof.'xDistribute
the
roof
load
uniformly.'xThe
roof
load
should
not
extend
past
the loading
area.'xAlways
place
the
heaviest
pieces
on
the
bot#j
tom.'xSecure
the
roof
luggage
firmly,
for
instance
using
ratchet
straps.'xDo
not
let
objects
project
into
the
opening path
of
the
trunk
lid.'xDrive
cautiously
and
avoid
sudden
accelera#jtion
and
braking
maneuvers.
Take
corners
gently.
Driving
on
racetracks
Warning
The
vehicle
is
not
designed
for
use
in
M
Sport or
motor
sport
type
competition.
There
is
a
risk
of
accident.
Do
not
use
the
vehicle
for
M
Sport or
motor
sport
type
competitions.
Higher
mechanical
and
thermal
loads
during
racetrack
operation
lead
to
increased
wear.
This
wear
is
not
covered
by
the
warranty.
Have
vehicle
checked
by
a
dealer#ss
service
cen#j
ter
or
another
qualified
service
center
or
repair
shop
before
and
after
driving
on
a
racetrack.
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