1995 BMW M3 Recommend gas

Non-returnable
Parts

FUNDAMENTALS
FOR
THEDO-ITYOURSELF
OWNER
010-
7

Many
independent
repair
shops
make
a
point
of
using
genu-



Original
body
paneis
and
other
large
components
are
identi-

ine
BMW
parts,
even
though
they
may
at
times
be
more
expen-



fied
by
a
label
bearing
the
VINand
two
BMW
roundellogos
.
Re-

sive
.
Theyknow
the
value
of
doing
thejob
right
with
the
right



placement
parts
have
a
similar
label,
bearing
one
BMW
roundel

parts
.
Parts
from
other
sources
can
beas
good,
particularly
if



logo
and
the
letters
DOT-R
.
See
Fig
.
6
.
Parts
or
assemblies

manufactured
by
one
of
BMWs
original
equipment
suppliers,



bearing
the
label
arethe
engine,
transmission,
front
and
rear

but
it
is
often
difficult
to
know
.



bumpers,
front
fenders,
rear
quarter
paneis,
hood,
trunk
lid
and

doors
.
These
labels
shouldnot
be
removed
as
they
will
tear

BMW
is
constantly
updating
and
improving
their
cars,
often



apart
.

making
improvements
during
a
given
model
year
.
BMW
may

recommend
a
newer,
improved
part
as
a
replacement,
and

your
authorized
dealer's
parts
department
will
know
about
it

and
provide
it
.
The
BMW
parts
organization
is
best
equipped
to
deal
with
any
BMW
parts
needs
.

Some
parts
cannot
be
returned
for
credit,
even
if
they
arethe

wrong
parts
forthe
car
.
The
best
example
is
electrical
parts,

which
are
almost
universally
considered
non-returnable
be-



,
..

cause
they
are
so
easily
damaged
internally
.

Buy
electrícal
parts
carefully,
and
beas
sure
as
possible
that
P-
DOT~
R

a
replacement
is
needed,
especially
for
expensive
parts
such
as
electronic
control
units
.
It
may
bewise
to
let
an
authorized



B328FUN

BMW
dealeror
other
qualified
shop
confirm
your
diagnosisbe-

fore
replacing
an
expensive
part
that
cannot
be
retuned
.



Fig
.
6
.



Labels
used
to
identiy
parts
.
Original
equipment
labelwith

VIN
number
and
roundel
logos
(top)
and
replacement
part
la-

bel
with
one
roundel
logos

Information
You
Need
to
Know

Engine
.
3-Seriescars
covered
in
this
manualare
powered

Model
.
When
ordering
parts
it
is
important
that
you
know
the



by
either
a
4-or
6-cylinder
engine
.
For
information
-
on
engine

correct
model
designation
for
your
car
.
Models
covered
in
this



codes
and
engine
applications,
see100
Engine-General
.

manual
are
E36
3
Series
in
both
4-
and
6-cylinderconfigura-

tions
.



Transmission
.
The
transmissiontype
with
its
identifying

code
may
be
important
when
buying
clutch
parts,
seals,
gas

Moda¡
Year
.
This
is
not
necessarily
the
same
as
date
of



kets,
and
othertransmission-relatedparts
.
For
information
on

manufacture
or
date
of
sale
.
A
1997
model
may
havebeen



transmission
codes
and
applications,
see200
Transmission

manufactured
in
late
1996,
and
perhaps
not
sold
until
early



General
.

1997
.
It
is
still
a1997
model
.
Model
years
covered
by
this
man-

ual
are
1992
to
1998
.

SERVICE
Date
of
Manufacture
.
This
information
is
helpful
when
or-

dering
replacement
parts
or
determining
if
any
of
the
warranty



BMW
dealers
are
uniquely
qualified
to
provide
service
for
recalls
are
applicable
to
your
car
.
The
label
on
the
driver's
door



BMW
cars
.
Their
authorized
relationship
with
the
large
BMW
below
the
door
latch
will
specify
the
month
and
year
that
the
car



serviceorganization
means
that
they
are
constantly
receiving
was
built
.



new
tools
and
equipment,
together
with
the
latest
and
most
ac-

curate
repair
information
.
Vehicle
Identification
Number
(VIN)
.
This
is
a
combination

of
letters
and
numbers
that
identify
the
particular
car
.
TheVIN

appears
on
the
state
registration
document,
and
on
thecar
it-

self
.
One
location
isin
the
rear
of
the
engine
compartment,
en-

other
in
the
lower
left
comer
of
the
windshield
.

The
National
Highway
Traffic
Safety
Administration
(NHT-

SA)
requires
passenger
cars
with
a
high
theftrateto
have
the

VINmarked
on
specific
parts
of
thecar
when
manufactured
.
On

BMW
cars,
these
parts
are
identified
byan
adhesive
label
.

)WBADK00000000

0
000
0

The
BMW
dealers
service
technicians
are
highlytrained
and

very
capable
.
Unfke
most
independent
repair
shops,
autho-

rized
BMW
dealers
are
intensely
committed
tosupporting
the

BMW
product
.
They
share
the
owners
interest
in
BMW
value,

performance,
and
reliability
.
On
the
other
hand,
there
are
many

independent
shops
that
specialize
in
BMW
service
and
are
ca-

pable
of
doing
high
quality
repair
work
.
Checking
with
other

BMW
owners
for
recommendations
on
service
facilitiesis
a

good
way
to
leam
of
reputable
BMW
shops
in
yourarea
.

SERVICE

Fig
.
16
.
Multimeter
or
Digital
Volt/Ohmmeter
(DVOM)
.

BMW
Special
Tools

FUNDAMENTALS
FOR
THE
DO-ITYOURSELF
OWNER
010-11

0012223

Some
of
the
more
challenging
repairs
covered
in
this
manual

cal¡
for
the
use
of
BMW
special
tools
.
This,
however,
does
not

automatically
mean
that
thejob
is
too
complicated
or
out
of

reach
of
thenovice
.

Many
of
the
BMW
special
tools
mentioned
in
this
manual
are
simplythe
best
thing
to
use
to
do
thejob
correctly
.
In
these
cas-

es,
the
tool
is
identified
with
a
BMW
part
number
.
See
your
au-

thorized
BMW
dealer
parts
department
for
information
on
how

to
order
special
tools
.

There
are
some
jobs
for
which
expensive
special
tools
are

essential,
and
not
a
cost-effective
purchase
for
one-time
repair

by
the
do-it-yourself
owner
.
This
manual
includes
such
repairs

for
the
benefit
of
these
with
the
necessary
experience
and
ac-

cess
to
tools
.
For
the
do-it-yourselfer,
the
need
for
special
tools

is
noted
in
the
text,
and
whether
or
not
BMW
dealer
service
is

recommended
.

EMERGENCIES

Changing
a
Tire

Stop
thecar
onas
flat
a
surface
as
possible,
in
a
place
where

you
canbe
easily
seen
by
other
drivers
.
Avoid
stopping
just

over
the
crest
of
a
hill
.
Turnon
the
emergency
flashers,
and
set

out
(lares
or
emergency
markers
well
behindthecar
.
Chock
the

wheel
(wheel
chock
located
in
trunk)
diagonally
opposite
to
the
one
being
changed
.
Passengers
shouldgetout
of
thecar
and

stand
well
away
from
the
road
.
Remove
the
spare
tire
from
the
spare
tire
storage
tray,
as
described
later
.

WARNING
-

If
a
tire
goes
fíat
while
drtving,
pull
well
off
the
road
.
Changing
a
tire
ona
busy
street
or
highway
is
very
dangerous
.
If
necessary,
drive
a
short
distance
on
the
fíat
tire
to
get
to
a
sale
place
.
tt
is
much
better
to
ruin
a
tire
or
rim
than
to
risk
being
hit
.

Take
the
jack
and
tools
from
the
tool
area
beneath
the
trunk

mat
.
Remove
the
spare
tire
from
the
tire
storage
tray
.

Loosen
the
wheel
bolts
while
the
car
is
on
the
ground,
but

leave
them
a
little
snug
.
Placethe
jack
in
the
lifting
point
nearest

the
wheel
beingchanged,
lifting
points
are
shown
in
Fig
.
1
and

Fig
.
2)
.
Use
a
board
to
provide
a
firm
footing
for
the
jack
if
the

ground
is
soft
.
Raise
the
car
only
lar
enough
so
that
the
wheel
is

fully
off
the
ground
and
then
remove
the
wheel
nuts
and
the

wheel
.

Insta¡¡
the
spare
wheel
.
Install
the
wheel
nuts
and
tighten

them
by
hand,
then
lower
the
car
.
With
all
wheelson
the

ground,
fully
tighten
the
nuts
in
a
crisscross
pattern
.
Torque
the

wheel
nuts
when
installing
the
wheel
.
Check
the
inflation
pres-

sure
of
the
spare
tire
.

Tightening
torques

"
Wheel
to
wheel
hub
.....
100
t
10
Nm
(74
t
7
ft-Ib)

Car
Will
Not
Start

If
the
engine
tucos
over
slowly
or
not
at
all,
especially
on
cold

mornings,
the
battery
may
not
be
sufficiently
charged
.
Jump-

starting
the
battery
from
another
car
may
help
.

WARNING
-

On
carswith
manual
transmisston,
push
starting
(or

tow
starting)
acar
ts
not
recommended
by
BMW
.

NOTE-

Be
sure
to
read
the
cautions
underJump
Starting
Car
prior
boosting
a
low
battery
.
Fatlure
to
followthe
cau-

tions
may
result
in
damage
to
the
electronic
compo-
nents
in
the
car
.

If
the
engine
is
turning
over
at
normal
speed
with
the
starter

motor,
the
battery
and
starter
are
fine
.
Check
to
make
sure
that

there
is
fuel
in
the
tank
.
Do
not
rely
on
the
fuel
gauge,
it
may
be

faulty
.
Instead,
remove
the
gas
filler
cap
and
rock
thecar
.
If

there
is
gas
in
the
tank,
you
should
hear
a
sloshing
sound
at
the

filler
neck
.
lf
there
is
plenty
offuel
in
the
tank,
see100
Engine-

General
for
in-depth
diagnostics
and
troubleshootingproce-

dures
.

EMERGENCIES

130-
6



FUEL
INJECTION

Warnings
and
Cautions

For
personal
safety,
as
well
as
the
protection
of
sensitive

electronic
components,
the
following
warnings
and
cautions

should
be
adhered
to
when
working
on
the
engine
manage-

ment
system
.

GENERAL
WARNING
-

"
The
ignition
system
produces
high
voltages
that

can
be
fatal
.
Avoid
contact
with
exposed
termi-

nals
.
Use
extreme
caution
when
working
onacar
with
the
ignition
switched
on
or
the
engine
run-
ning
.

"
Do
not
touch
or
disconnect
any
high
voltage
ca-

bles
from
the
coils
or
spark
plugs
while
the
engine

is
running
or
beingcranked
by
the
starter
.

"
Connect
and
disconnect
the
DME
system
wiring
and
test
equipment
leads
only
when
the
ignition
is
switched
off
.

"
Gasoline
is
highly
flammable
and
fts
vaporsare

explosive
.
Do
not
smoke
or
work
on
a
car
near
heaters
or
other
fire
hazards
when
diagnosing
and
repalring
fuel
system
problems
.
Have
a
tire
extinguisher
avaílable
in
case
of
an
emergency
.

"
When
working
onan
open
fuel
system,
wear
suit-
able
hand
protection,
asprolonged
contact
wfth
fuel
can
cause
illnesses
and
skin
disorders
.

"
Renew
fuel
system
hoses,
clamps
and
O-rings
any
timethey
are
removed
.

"
Before
makingany
electrical
tests
that
require
the
engine
to
be
cranked
using
the
starter,
disable
the
ignition
system
as
described
in
120
Ignition
System
.

CAUTION-

"
Prior
to
disconnecting
the
battery,
read
the
bat-
tery
disconnectinn
cautions
given
at
the
front
of
this
manual
onpage
vifi
.

"
Do
not
connect
any
test
equipment
that
delivers

a
12-volt
power
supply
to
terminal
15
(+)
of
the
ig-

nitioncoil
.
The
current
flow
may
damage
the

ECM
.
In
general,
connect
test
equipment
only
as

speclfied
by
BMW,
this
manual,
or
the
equipment

maker
.

"
Only
use
a
digital
multlmeter
for
electrical
test
.

"
Only
use
an
LED
test
light
for
quick
tests
.

"
Disconnecting
the
battery
may
erase
fault

code(s)
stored
in
memory
.
Check
for
fault
codes

prior
to
disconnecting
the
battery
cables
.
ff
the

Check
Engine
light
ís
illuminated,
see100En-
gine-General
for
DME
fault
code
information
.
ff
any
other
system
faults
have
been
detected
(indi-
catedbyan
illuminated
warning
light),
see
an
au-
thorized
BMW
dealer
.
Additional
systems
with
self-diagnostic
capabilities
include,
ABS
(Anti-
lock
brakes),
SRS
(Airbags),
EML
and
ASC+T
and
AST
(Traction
Control)
.

"
Do
not
run
the
engine
wfth
any
of
the
spark
plug
wires
dlsconnected
.
Catalytic
converter
damage
may
result
.

"
Always
waitat
least
40
seconds
afterturning
off
the
ignition
before
removing
the
engine
control
module
(ECM)
connector
.
ff
the
connector
isre-
moved
before
this
time,
residual
power
in
the
sys-
tem
relay
may
damage
the
control
module
.

"
Cleanliness
is
essential
when
working
onan
open
fuel
system
.
Thoroughly
clean
fuel
line
con-
nections
and
surroundlng
areas
before
loosen-
ing
.
Avoid
moving
the
car
.
Only
fnstall
cleanparts
.

"
Fuel
system
cleaners
and
other
chemical
addi-
tives
other
than
those
specifically
recommended
by
BMW
may
damage
the
catalytic
converter,
the
oxygensensor
or
other
fuel
supply
components
.

NOTE-



NOTE-
"
The
Ole
speed
control
valve
signal
can
be
checked



The
intake
manifold
is
held
in
place
with
7
nuts
from
using
a
duty
cycle
meter
(or
dwellmeter)
.
Connect
the



above
and
2
support
bracket
bolts
from
undemeath
.
On
meter
to
the
valve
following
the
manufacturer's
in-



DME
3
.1
cars,
carefully
disconnect
the
idleair
hose
from
structions
.
Turn
on
the
WC
or
create
a
larga
air
leak



theintake
manifold
when
lifting
the
manifold
off
.
For
more
and
check
that
the
meter
reading
reacts
while
the
idle



information,
sea
113
Cylinder
HeadRemovaland
In-
speed
remainssteady
.



stallation
.

"
There
are
some
additional
inputs
to
the
control
mod-
ule
that
affect
idle
speed
(Le
.
throttle
position,
AIC-on



5
.
Disconnect
al¡
necessary
hoses
andremove
idle
speed
signals,
andAIT
Drive
position)
.
Check
these
signals



control
valve
.
if
idle
problems
persist
.
See
Tabla
i
orTable
j
.

Idle
speed
control
valva,
replacing

The
idle
speed
control
valve
is
mounted
beneath
the
intake
manifold
.
Accessing
the
valva
is
best
accomplishedby
first
re-
moving
the
intake
manifold
.

NOTE-

¡tis
recommended
that
the
intake
manifold
gaskets
be
replaced
whenever
the
intake
manifold
is
removed
.

1
.
Remove
top
enginecovers
from
engine
.
See
Fig
.
31
.

FUEL
INJECTION



130-21

6
.
Installation
is
reverse
of
Removal
.
Use
new
gaskets
when
installing
intake
manifold
.

NOTE-

Poor
driveability
may
be
noticed
afterinstalling
a
re-
placement
idle
speed
control
valve
.
After
about
10
min-
utes
of
driving,
the
system
will
adapt
the
base
setting
of
the
valva
and
the
idle
speed
should
retum
to
normal
.

Tightening
Torque

"
Intakemanifold
to

cylinder
head
(M7)
........
..
.
15±2
Nm
(11
ti
ft-Ib)

BOSCH
DME
M5
.2

COMPONENT
REPLACEMENT

On-Board
Diagnostics
11
(OBD
II)
is
incorporated
into
the

Bosch
DME
M5
.2
engine
management
systems
used
on
the

M44
engine
.
OBD
II
is
capable
of
detecting
a
full
range
of

faults
.
When
faults
are
detected,
a
Diagnostic
Trouble
Code
(DTC)
is
stored
in
the
system
ECM
.
The
Check
Engine
warn-
ing
light
will
also
come
on
if
an
emissions-relatad
fault
is
de-
tected
.

The
most
efficient
way
to
diagnose
the
Bosch
OBD
II
sys-

tem
is
by
using
a
specialized
scan
tool
.
The
OBD
II
system
is

capable
of
storing
hundreds
of
faults,
making
diagnostics
with

a
scan
tool
the
only
viable
method
.
Therefore,
system
diag-
nostics
is
not
covered
here
.

Fi



31
.
Remove
to
en
ine
covers
b



in
out
caPs
and
removin



NOTE-

nuts
(A)
9
.



P



g



y
Pry
g



g



"
The
OBD
11
fault
memory
(including
an
iiluminated
Note

14


L-te
at
cover
edge
(arrows)
.
Check
Engine
light)
can
only
be
reset
using
the
spe-
cial
scan
tool
.
Removing
the
connector
from
the
ECM
2
.
Remove
two
hold
down
nuts
from
fuel
injector
wiring



or
disconnecting
the
battery
will
not
arase
the
fault
duct
.
Pry
back
injector
connector
retainers
and
lift
off



memory
.

wiring
duct
.



"
The
16-pin
OBD
Il
diagnostic
connector
is
located
on
the
lower
left
dash
panel
.
Refer
to
Fig
.
1
.
3
.
Disconnect
intake
air
bootfrom
throttle
housing
.
Where

applicable
disconnect
accelerator
cable
and
cruise



"
BMW
special
scan
tool
ora
`generic"OBD
II
scan
tool

control
cable
from
their
brackets
.



must
be
used
to
access
DTCs
.

4
.
Unbolt
intake
manifold
and
move
it
out
of
way
enough

to
access
idle
speed
control
valva
.

"
Tablak
lists
engine
control
module
(ECM)
pinouts
for
the
DMEM5
.2
system

BOSCH
DME
M5
.
2
COMPONENT
REPLACEMENT

330-
4



REAR
SUSPENSION

7
.
Installation
is
reverse
ofremoval,
noting
the
following
:

"
Make
sure
all
threaded
bolts,
nuts
and
makng
surfaces

are
clean
.

"
Instan
shock
absorber
finto
shock
tower
using
a
new

uppermounting
gasket
and
new
self-locking
nuts
.

"
Tighten
lower
boltto
its
final
torque
oncecar
is
on
ground
.

Tightening
Torques

"
Road
wheel
to
hub
.........
100±10
Nm
(74±7
ft-Ib)

"
Shock
absorber
to
trailing
arm

(car
in
normalloaded
position)
......
77
Nm
(57
ft-Ib)

"
Shock
absorber
to
upper
mount
.....
14
Nm
(10
ft-Ib)

"
Shock
absorber
upper
mount
to
body
(M8
self-locking
nuts)
.............
24
Nm
(17
ft-Ib)

Coil
spring,
removing
and
installing

WARNING
-

"
The
coil
spring
is
undercompressive
force
and
ís
extremely
dangerous
until
compression
isre-
moved
.

"
lt
is
recommended
that
a
restraining
chain
be
in-
stalled
between
the
bottomof
the
coil
spring
and
the
upper
control
arm
to
retain
the
spring
in
case
of
accidental
release
.
Personal
injury
can
result
if
the
compressed
coil
spring
is
not
released
slowly
and
carefully
.

"
Make
sure
that
the
car
is
firmly
supported
on
jack
standsdesigned
for
the
purpose
.
Place
the
jack
standsbeneatha
structural
chassis
point
.
Do
not
place
jack
stands
under
suspension
parts
.

1
.
Raise
car
and
remove
rear
wheel
.

2
.
Support
suspension
arm
from
below
using
a
transmis-

sion
jack
orequívalent
.
Tightening
Torques

3
.
Remove
drive
axle
from
final
drive
.
See
Fig
.
6
.
Suspend



"
Drive
axle
to
final
drive
flange

drive
axle
from
chassis
using
stiff
wire
.



M8
Torx
bolt
.
..
...
.
.............
64
Nm
(47
ft-Ib)

M10
Torx
bolt
...................
83
Nm
(62
ft-Ib)

4
.
Disconnect
shock
absorber
from
traíling
arm
.



"
Road
wheel
to
hub
.........
100±10
Nm
(74±7
ft-Ib)

"
Shock
absorber
to
trailing
arm
......
77
Nm
(57
ft-Ib)
5
.
Lower
suspension
slowly
and
carefully
until
the
com-
pressed
coil
spring
is
fully
unloaded
.

CAUTION
-

The
shock
absorber
prevents
the
drive
axle
and
trailíng
arm
from
drooping
too
far,
so
always
sup-port
the
trailing
arm
before
removing
the
shock
.
Damage
to
drive
axle
CV
joints
can
result
.

6
.
Remove
restraining
chain
and
remove
coi¡
spring
.

REAR
WHEEL
BEARINGS

Fig
.
6
.



Driveaxle
to
final
drive
mounting
bolts
(arrows)
.

0012103

7
.
If
spring
is
to
be
reused,
carefully
inspect
it
for
any
sur-

face
damage
or
corrosion
.
Inspect
spring
mounts
for

any
signs
of
damage
.
Replace
any
parts
showing
evi-

dence
of
wear
or
damage
.

8
.
Fit
coil
springtospring
mountsand
insta¡¡
restraíning

chaina

9
.
Slowly
lift
suspensionback
into
position,
making
sure

coil
spring
is
correctly
seated
in
upper
and
lower
coil

spring
mounts
.

10
.
When
suspension
has
been
lifted
sufficiently,
instan

shock
absorber
to
trailing
arm
.
Remove
restraining

chain
.

11
.
The
remainder
of
installation
is
reverse
of
removal
.

REAR
WHEEL
BEARINGS

The
rear
wheel
bearing
is
a
unitized
assembly
and
is
not
re-

pairable
separately
.
See
Fig
.
7
.

Special
press
tools,
to
be
used
with
the
trailing
arm
at-
tached
to
the
car,
are
requiredto
replace
the
wheel
bearings
.
Read
the
procedure
through
before
beginning
thejob
.

To
access
the
rear
window
blower
relay,
remove
the
glove
compariment
.
See
Fig
.
32
.

Fig
.
32
.
Rear
window
blower
relay
located
in
frontof
glove
compart-
ment
(arrow)
.

AIR
CONDITIONING

Thissection
covers
removal
and
installation
of
air
condition-

ing
refrigerant
components
.
A/C
testing
and
diagnosis,
refrig-

erantdischarge,
evacuatíon
and
recharge
are
not
covered

here
.

The
subassemblies
and
lines
of
the
air
conditionerare
filled

with
either
refrigerant
R12
(1992
cars)
or
R-134a
(1993
and

later
cars)
.
The
major
components
of
the
A/Csystem
are

shown
in
Fig
.
33
.

A/CSystem
Warnings
and
Cautions

WARNING
-

"
Always
be
careful
that
refrigerant
does
not
come
in
contact
with
your
skin
.
Always
wearhand
andeye
protection
(gloves
and
goggles)
when
work-

ing
around
the
AIC
system
.
If
refrigerant
does
come
in
contact
with
your
skin
oreyes
:
-Do
not
rub
skin
oreyes
;

-Immediately
flush
skin
oreyes
withcool
water
for
15
minutes
;
-Rush
to
a
doctor
orhospital
;
-Do
not
attempt
to
treat
yourself
.

"
Work
in
a
wefl
ventilated
area
.
Avoid
breathing
re-
frigerant
vapors
.
Exposure
may
irrítate
eyes,

nose,
and
throat
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
Do
not
expose
any
component
of
the
AIC
system
to
high
temperatures
(Above
80°Cl176°F)or

open
flames
.
Excessive
heat
will
cause
a
pres-

sureincrease
whichcould
burst
the
system
.

HEATING
AND
AIR
CONDITIONING



640-
1
1

0013015

WARNING
-

"
Keep
refrigerant
away
from
open
llames
.
Poison-
ous
gas
will
be
produced
if
it
bums
.
Do
not
smoke
near
refrigerant
gases
for
the
same
reason
.

"
The
AICsystem
is
filled
with
refrigerant
gas
which
is
under
pressure
.
Pressurized
refrigerant
in
the
presenceof
oxygen
may
forma
combusti-
ble
mixture
.
Never
introduce
compressed
air
finto
any
refrigerant
container
(full
or
empty),
capped
off
AIC
component,
or
piece
of
service
equip-
ment
.

"
Refrígerant
gases
are
heavier
than
air,
displace
oxygen
and
may
cause
suffocation
in
areas
of
poor
círculation,
for
example
under
a
car
.
Switch
on
exhaustlventilation
systems
when
working
on
the
refrigerant
system
.

"
State
and
local
governments
may
have
additional
requirements
regarding
air
conditioning
servic-
ing
.
Alwayscomply
with
state
and
local
laws
.

"
Electric
welding
near
refrigerant
hoses
causes
R-134a
to
decompose
.
Discharge
system
before
welding
.

CA
UTION
-

-As
of
January
1,
1992,
any
person
who
services
a
motor
vehicle
air
conditioner
must,
by
law,
be
properly
trained
and
certified,
and
use
approved
refrigerant
recycling
equipment
.
Technicians
must
complete
an
EPA-approved
recycling
course
to
be
certified
.

"
It
is
recommended
that
al¡
system
refrigerant
AIC
refrigerant
be
left
to
an
authorized
BMW
dealer
or
other
qualified
AIC
service
facility
.

"
Do
not
top
off
a
partially
charged
refrigerant
sys-
tem
.
Dischargesystem,evacuate
and
then
re-
charge
system
.

"
R-134a
and
R-12
refrigerants
and
refrigerant
oils
and
system
components,
including
hoses
and
sealing
O-rings,
are
NOT
compatible
.
Compo-
nent
damage
andlor
system
contamination
will

result
.

"
The
mixture
of
refrigerant
oil
(PAG
oil)
and
refrig-
erant
R-134a
attacks
some
metals
and
alloys
(for
example,copper)
and
breaks
down
certain
hose
materials
.
Use
only
hoses
and
lines
that
are
iden-
tified
with
a
green
mark
(stripe)
or
the
lettering
R-
134a"
.

"
Immediately
plug
open
connections
on
AIC
com-
ponents
to
prevent
dirt
and
moisture
contamina-
tion
.

"
Do
not
steam
clean
condensers
or
evaporators
.

Use
only
cold
water
or
compressed
air
.

AIR
CONDITIONING