BMW 3 (E46). Manual — part 251
Component
Year, model
Location
Refer to
Headlight vertical
aim load sensor,
front
1999 - 2001
Front subframe, right side
Fig. 59
Headlight vertical
aim load sensor, rear
1999 - 2001
Rear subframe, right side
Headlight washer
pump
1999 - 2001
Front of washer tank, right front
engine compartment
Heater blower
see A/C blower entries
Heater core
temperature sensor
1999 - 2001
Behind center console below radio
Fig. 45
Heater recirculation
distribution motor
see Air distribution motors
Heater regulator air
distribution motor
see Air distribution motors
Heater valve
assembly
1999 - 2001
Mounted on inner side of left strut
tower
Fig. 27
Heating-A/C
see A/C entries
High beam switch
see Turn signal/headlight dimmer
switch (stalk switch)
Hood switch
see Engine hood security switch
Horn button
1999 - 2001
On steering wheel pad
Horn relay
1999 - 2001
Main relay panel behind glove
compartment
Fig. 14
,
Fig. 15
Horn (left/right)
1999 - 2001
Next to front bumper impact
absorber (left/right)
Hot-film mass air
flow sensor
see Mass air flow sensor
Idle speed control
valve
1999 - 2001
Under intake manifold
Fig. 23
Ignition coils
1999 - 2001
Top of cylinder head, under plastic
cover
Fig. 25
Ignition relay
see Unloader relay
Ignition switch
1999 - 2001
Right side steering column
IHKA
see A/C entries
Component
Year, model
Location
Refer to
Individual control
intake system valve
see Resonance valve, intake
manifold
Inflator assembly,
airbag
see Airbag entries
Instrument cluster
control unit
1999 - 2001
In instrument cluster
Intake air
temperature (IAT)
sensor
1999 - 2001
Center top of engine, between intake
manifold and cylinder head
Fig. 25
Intake manifold
resonance valve
see Resonance valve, intake
manifold
Interior protection
control module
(SDR)
Convertible
On center tunnel below console
Interior protection
control module (UIS)
Sedan, Coupe,
Sport Wagon
In headliner
Interior temperature
intake fan
1999 - 2001
In A/C control module in center
console
Keyless entry
antenna
see Antenna, FZV (keyless entry)
Kickdown switch,
automatic
transmission
see Accelerator pedal sensor (PWG)
Knock sensors
1999 - 2001
Under intake manifold
Fig. 24
Lateral acceleration
sensor
see ABS/DSC lateral acceleration
sensor entries
LDP
see Fuel tank leakage diagnosis
pump (LDP or DMTL)
Leakage diagnosis
pump (LDP)
see Fuel tank leakage diagnosis
pump (LDP or DMTL)
Light control module
1999 -2001
In light switch center (LSZ)
Light switch
assembly
1999 - 2001
In light switch center (LSZ)
Light switch center
(LSZ)
1999 - 2001
In dashboard, left of steering wheel
Load-reduction relay
see Unloader relay
Component
Year, model
Location
Refer to
Lumbar support air
compressor
1999 - 2001
Under each seat equipped with
support system
Lumbar support
control switch
1999 - 2001
Below seat base trim
Lumbar support
switch
1999 - 2001
Four-way toggle switch at base of
seat, near seat control switches
Main fuse panel
see Fuse panel, main
Main relay panel
see Relay panel, main
Main harness fuse
see Fuse for main harness F108
(200 amp)
Mass air flow sensor
1999 - 2001
Left side engine compartment
Fig. 17
Mixing actuators
see Air distribution motors
MRS module
see Airbag control module
Multi-function clock
1999 - 2001
In dash cluster below speedometer
and tachometer
Multiple restraint
system (MRS)
module
see Airbag control module
Navigation computer
1999 - 2001
Left side of trunk
Neutral safety switch
see Automatic transmission range
switch
OBD II connector
(16-pin DLC)
1999 - 2001
In left footwell top trim, under left
side of instrument cluster (see also
Data link connector)
Oil pressure switch
1999 - 2001
Left front of engine at oil filter
housing
Fig. 26
Oil temperature
sensor
1999 - 2001
Left front of engine at oil filter
housing
Fig. 26
On-board computer
1999 - 2001
In instrument cluster
On-board monitor
1999 - 2001
In center of dashboard
Outside air
temperature sensor
1999 - 2001
Under left side of front bumper
Outside mirror
control switch
1999 - 2001
On left front door arm rest
Component
Year, model
Location
Refer to
Oxygen sensor
connector,
post-catalyst
1999 - 2001
Top of engine, between intake
manifold and cylinder head cover
Fig. 25
Oxygen sensor
connector,
precatalyst
1999 - 2001
Top of engine, between exhaust
manifold and cylinder head cover
Fig. 25
Oxygen sensor,
post-catalyst
1999 - 2001
Bottom of exhaust manifold (access
from below)
Fig. 58
Oxygen sensor,
precatalyst
1999 - 2001
Top of exhaust manifold
Fig. 25
Park angle/tilt sensor 1999 - 2001
In right side trunk behind trim
Park distance control
(PDC) module
1999 -2001
In right side trunk above battery
Park distance control
sensors
1999 - 2001
Rear bumper trim strip
Fig. 67
Park distance control
warning speaker
1999 - 2001
Right rear speaker, rear parcel shelf
Parking brake
warning switch
1999 -2001
Under center console, rear of
parking brake handle
Fig. 49
Pedal position
sensor
see Accelerator pedal sensor (PWG)
Pinch protection,
window
see Window anti-trap strip
Power socket, 12-volt Sport Wagon
Cargo compartment behind left rear
seat
Fig. 57
Power window
motors
see Window motors
Power window
switches
see Window switches
Pressure sensitive
finger guard
see Window anti-trap strip
Radiator fan
see Engine cooling fan (electric)
Radio antenna
see Antenna entries
Radio controls
(steering wheel)
1999 - 2001
On steering wheel left keypad
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