Wheel nut BMW 318i 1997 E36 Repair Manual

510-4



EXTERIOR
TRIM,
BUMPERS

Fig
.
8
.



Bumper
cover
retaining
screws
(arrows)
in
left
wheel
weil
.

7
.
Disconnect
harnessconnectors
at
outside
temperature



0013052

sensor
at
rear
of
left
side
of
bumperand
temperatura



Fig
.
9
.



Front
bumper
impact
absorber
mounting
nuts
(A)
and

switch
at
rear
of
right
side
of
bumper
(if
applicable)
.



bumper
bracket
hardware
(B)
.

8
.
Slide
bumper
straight
off
sida
brackets
.

9
.
Installation
is
reverse
of
removal,
notingthe
following
:



When
removing
and
installing
therear
bumper
or
its
compo-

"
Slide
side
brackets
on
bumper
and
body
carefully
to-



nents,
referto
Fig
.
10
.

gether
.

"
Make
sure
tabs
on
trim
strip
engage
slots
in
bumper



1
.
Raise
and
properly
support
vehicle
.

correctly
.

Tightening
Torque

"
Bumper
to
bumper

bracket
(M8
nut)
............
...
.
.
22
Nm
(16
ft-Ib)

2
.
Working
under
bumper,
remove
screws
or
expansion

Front
bumper
impact
absorber,replacing



rivetsat
corners
and
middle
of
lower
bumper
panel
.
Pull

panel
backward,
uncoupling
it
from
bumper
cover
.
See

Thebumper
mounting
bracket
and
impact
absorber
mount-



Fig
.
11
.

ing
hardware
are
accessible
with
the
Font
bumper
removed,
as
described
above
.
See
Fig
.
9
.



3
.
Remove
bumper
cover
expansion
rivets
and
screws
in-

side
left
and
right
rear
wheel
wells
.

NOTE
-

Install
the
bumper
bracket
boltwith
thread
locking
com-
pound
suchas
Loctite
8
270
or
equivalent
.

Tightening
Torques

"
Bumper
bracket
to
impact
absorber

(M10
nut)
.
..
.
...
.............:.
55
Nm
(41
ft-Ib)
"
Impact
absorber
to
chassis
(M6
nut)
...
9
Nm
(7
ft-Ib)

BUMPERS

Rear
bumper,
removing
and
installing

WARNING
-

Make
sure
that
the
car
is
firmly
supported
on
jack

stands
designad
for
the
purpose
.
Place
the
jack

stands
beneath
a
structural
chassis
point
.
Do
not

place
jack
stands
under
suspension
parts
.

4
.
Remove
left
and
right
bumper
bracket
mounting
bolts

and
remove
bumper
.
See
Fig
.
12
.

5
.
Installation
is
reverse
of
removal
.

NOTE-

Install
the
bumper
bracket
bolt
with
thread
locking
com-
pound
suchas
Loctite®270
or
equivalent
.

513-2



INTERIOR
TRim

DASHBOARD

Dashboard
removal
is
a
complex
operation,
involving
dis-

connection
and
dismantling
of
a
number
of
electrical
and
dash

structural
components
.

The
BMW
E36
is
equipped
with
SRS
airbags
mounted
in

the
steering
wheel,
in
the
dashboard
(1994
and
later)
on
the

passenger
side,
and
in
the
front
doors(1997
and
later)
.
Air-

bags
units
are
pyrotechnic
devices
and
should
be
treated
with

extreme
caution
.
Improper
handling
of
the
airbags
could

cause
serious
injury
.

WARNING
-

"
The
BMW
Supplemental
Restraint
System
(SRS)
is
complex
and
special
precautions
must
be
ob-
served
when
servicing
.
Serious
injury
may
result
if
system
service
is
attempted
by
persons
unfa-
miliar
with
the
BMW
SRS
and
its
approved
ser-vice
procedures
.
BMW
specifies
that
all
inspection
and
service
shouldbe
performed
byan
authorized
BMW
dealer
.

"
Beforeperforming
any
work
involving
the
steering
wheel
or
interior
trim
in
the
vicinity
of
the
airbags,
disconnect
the
negative
()
battery
cable
.
See
721
Airbag
System
(SRS)
.

"
SRS
contains
aback-up
power
supply
within
the
SRS
control
module
.
A
10
minute
díscharge
peri-
od
should
be
allowed
after
the
battery
cable
has
been
disconnected
.

Glove
compartment,
removing
and
installing

1.
Open
glove
compartment
door
.

2
.
Remove
glove
compartment
mounting
screws
.
See
Fig
.
2
.

3
.
Pull
glove
compartment
out,
disconnecting
electrical

harness
connectors
as
necessary
.

4
.
Installation
is
reverse
of
removal
.

DASH80ARD

Fig
.
2
.



Glove
compartment
mounting
screws
(arrows)
.

Lower
left
dash
panel,

removing
and
installing

0013107

1
.
Remove
lower
dash
panel
retaining
screws
.
See
Fig
.
3
.

0013155

Fig
.
3
.



Lower
left
dash
panel
retaining
screws
(arrows)
.

2
.
Pull
lower
dash
panel
left
and
back
to
disengagefrom
driver's
footwell
retaining
clips
.

3
.
Installation
is
reverse
of
removal
.

1
.
Disconnect
negative
(-)
cable
from
battery
and
cover

negative
terminal
with
insulating
material
.

CA
UTION-

Prior
to
disconnectiog
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
viii
.

2
.
Remove
driver
sideairbag
from
steering
wheel
.
See

Driver
side
airbag,
removing
and
installing
in
this

repair
group
.

3
.
With
wheels
facing
straight
ahead
and
steering
wheel

centered,
remove
steering
wheel
.
See320
Steering
and
Wheel
Alignment
.

4
.
Remove
contact
ring
cover
(flat
plastic
ring
containing

warning
text)
from
steering
wheel,
íf
applicable
.

5
.
Disconnect
ground
wire,
if
applicable

6
.
Lift
out
plastic
lock
from
steering
wheel,
if
applicable
.

See
Fig
.
2
.

0011903

Fig
.
2
.



Airbag
contact
ring
lock(arrow)
.
Pry
out
lock
and
remove
spríng
from
behind
lock
.
Some
airbag
steering
wheels
are
not
equipped
with
contact
ring
lock
.

WARNING
-

"
The
contact
ring
lock
holds
the
contact
ring
in
the
centered
position
.
Once
the
lock
is
removed,
the
contact
ring
is
free
to
rotate
.
Do
not
allow
the
con-

tact
ring
to
rotate
once
the
lock
is
removed
.

"
If
the
contact
ring
is
accidentally
rotated
outof
center,
turn
the
ring
either
fully
clockwise
orcoun-
terclockwise,
then
turn
in
the
opposite
direction
3
complete
revolutions
until
the
alignment
arrow
canbe
seen
through
the
lock
opening
.

AIRBAG
SYSTEM
(SRS)



721-
3

Airbagcontact
ring,
replacing



7
.
Remove
mounting
nutsor
screws
from
contact
ring
.

See
Fig
.
3
.
Disconnect
wire
lead(s)
andremove
contact

The
airbag
contact
ring
is
mounted
to
the
rear
of
the
steer-



ring
from
rear
of
steering
wheel
.

ing
wheel
and
is
made
up
of
a
wireribbon
that
cofs
and
un-

coils
as
the
steering
wheel
is
tumed
.
The
contact
ring
assures
continuous
electrical
contact
to
the
driver
side
airbag
unit
.

Fig
.
3
.



Airbag
contact
ring
mounting
fasteners(arrows)
.

8
.
Installation
is
reverse
ofremoval,noting
the
following
:

"
Coat
horn
slip
ring
(electrical
contact
ring)
with
CRC
®
copper
paste
before
installing
steering
wheel
.

"
Press
on
lower
lock
until
it
ís
fully
engaged
.

"
When
installing
contact
ringlock,
make
sure
lock

spring
engages
pins
on
lock
and
lock
cover
.

"
Special
instructions
apply
when
installing
airbag

equipped
steering
wheel
.
See320
Steering
and

Wheel
Alignment
.

Early
cars
(through
1993)
:

"
Route
wiring
lead
for
horn
through
squareopening
in

steering
wheel
.

"
When
installing
a
new
contact
ring
from
BMW,
remove

locking
screw
after
installing
the
contact
ringto
steer-

ing
wheel
.
See
Fig
.
4
.

"
Lock
contact
ring
mounting
fasteners
in
place
using

lacquer
paint
or
varnish
.

0011904

Fig
.
4
.



Airbag
contact
ring
locking
screw
(arrow),
as
installed
on
new

replacement
part
from
BMW
(early
production
cars)
.

AIRBAG
SENSORS
AND
ELECTRONICS

Fig
.
8
.



Airbag
crash
sensor
mountingscrews
(arrows)
on
early
cars
.
Note
Torx
screws
with
anti-tamper
pin
in
screw-head
.

ZAE
control
module,
replacing

NOTE-

Some
versions
of
early
ZAE
control
modules
are
no
longer
available
from
BMW
.
When
replacing
control
modules
on
cars
built
between
September
1993
and
June
1994,
consulta
BMW
parts
department
for
the
lat-
est
information
on
retrofitting
the
later
module
.
3
.
Remove
orange
SRS
connector
from
its
holder
and
carefully
separate
connector
.
Refer
to
Fig
.
7
.
1
.
Disconnect
negative
(-)
cable
from
battery
and
cover

negative
terminalwith
insulating
material
.



4
.
Working
behind
steering
wheel,
completely
loosen
Torx

screws
(T30)
while
holdingairbag
in
place
.
See
Fig
.
9
.
2
.
Lift
rearseat
cushion
.
Unplug
harness
connectors
and



Support
airbag
unit
toprevent
it
from
falling
out
.
remove
ZAE
airbag
control
module,
which
is
bolted
to

top
of
driveshaft
tunnel
.

3
.
Installation
is
reverse
of
removal
.

Front
side-impact
airbag
crash
sensor,

removing
and
installing

1
.
Disconnect
negative
(-)
cable
from
battery
and
cover

negative
terminal
with
insulating
material
.

2
.
Remove
front
seat
.
See520
Seats
.

3
.
Convertible
:
remove
rear
seat

4
.
Remove
plastic
door
sill
trim
.

5
.
Fold
up
carpet
in
back
of
front
seat
.

6
.
Pull
off
connector
from
crash
sensor,
which
is
located

under
rugnext
to
door
si¡¡
.

7
.
Remove
sensorby
removing
screws
.
Note
direction
ar-

row
before
removing
sensor
.

8
.
Installation
is
reverse
of
removal,noting
direction
arrow

on
sensor
.

AIRBAGS

AIRBAG
SYSTEM
(SRS)



721-
5

Driver
side
airbag,

removing
and
installing

1
.
Disconnect
negative
(-)
cable
from
battery
and
cover
negative
terminal
with
insulating
material
.

WARNING
-

On
cars
with
ZAE
system
:
If
theairbag
system
has
detected
a
fault
(SRS
indicator
illuminated),
a
wait-
ing
period
ofat
least
ten
minutes
must
be
observed
before
removing
the
airbag
from
the
steering
wheel
.
This
will
allow
the
system
capacitor
to
discharge,
re-
ducing
the
possibility
of
a
trigger
pulsebeinggener-
ated
to
the
airbag
.

CAUTION-

Prior
to
disconnecting
the
battery,
read
the
battery
disconnection
cautions
given
at
the
front
of
this
manual
on
page
vi¡¡
.

2
.
Remove
lower
steering
column
trim
mounting
screw

andremove
lower
trim
.
Refer
to
Fig
.
6
.

Fig
.
9
.



Driver
sideairbag
unit
mounting
screws
(arrows)
.

0011893

AIRBAGS