2004 BMW X3 3.0I check engine light

Under the engine hood
96
Checking coolant level and topping
up coolant
Check the coolant level with the engine
cold, approx. 687/206:
1.Turn the cap of the expansion tank
counterclockwise to allow any accumu-
lated pressure to escape, then continue
turning to open
2.The coolant level is correct if the upper
end of the red float bar is at least at the
same height as the top edge of the filler
neck, refer to arrow. The bar end may
only protrude by a maximum of i in/
2 cm, i.e. up to the second mark on the
float bar, refer also to sketch beside the
filler neck
3.If necessary, add coolant. Slowly add
coolant until the correct level is reached
Ð do not overfill.
Always observe all applicable rules
and regulations for environmental
protection when disposing of used anti-
freeze and anticorrosion agents.<
Brake system
Malfunction
Brake fluid
The warning lamp lights up red
despite the handbrake being
released: stop immediately.
The brake fluid in the reservoir has fallen to
below the minimum level. At the same time,
a considerably longer brake pedal travel
may be noticeable. Contact the nearest
BMW Sports Activity Vehicle Center.During continued driving increased
brake pedal pressure may be neces-
sary, and considerably longer braking dis-
tances may result. Please adapt your driv-
ing style accordingly.<
Warning lamp for Canadian models.
Brake pads
The indicator lamp comes on.
The brake pads have reached their
minimum pad thickness. See your
BMW Sports Activity Vehicle Center imme-
diately to have the pads replaced.
For your own safety: use only brake
pads that BMW has released for your
particular vehicle model. As BMW cannot
assess the suitability of other brake pads
for use on your vehicle, we are unable to
assume continued responsibility for the
vehicle's operating safety if non-approved
pads are installed.<
For additional information on the brake sys-
tem, refer to page 77.

Laws and regulations
98
Laws and regulations
California Proposition 65
Warning
California laws require us to state the fol-
lowing warning:
Engine exhaust and a wide variety of
automobile components and parts,
including components found in the interior
furnishings in a vehicle, contain or emit
chemicals known to the State of California
to cause cancer and birth defects and
reproductive harm. In addition, certain flu-
ids contained in vehicles and certain prod-
ucts of component wear contain or emit
chemicals known to the State of California
to cause cancer and birth defects or other
reproductive harm. Battery posts, terminals
and related accessories contain lead and
lead compounds. Wash your hands after
handling. Used engine oil contains chemi-
cals that have caused cancer in laboratory
animals. Always protect your skin by wash-
ing thoroughly with soap and water.<
OBD connector
The interface socket for the Onboard Diag-
nostic is located on the left of the driver's
side at the bottom of the instrument cluster
and under a cover. The cover has the let-
ters OBD on it.
The most important components for the
composition of the emissions can be
checked by a device across this interface. If the Service Engine Soon indicator
lamp comes on either continuously
or intermittently, this indicates a
fault in the emissions-related electronic
systems. Although the vehicle remains
operational, you should have the systems
checked by your BMW Sports Activity
Vehicle Center at the earliest possible
opportunity.
The illuminated indicator lamp informs you
of the need for service, not that you need to
stop the vehicle. However, the systems
should be checked by your BMW Sports
Activity Vehicle Center at the next opportu-
nity.
If the indicator lamp blinks or flashes, this
indicates a high level of engine misfire.
Reduce speed and contact the nearest
BMW Sports Activity Vehicle Center imme-
diately. Severe engine misfiring over even a
short period of time can seriously damage
emission control system components,
especially the catalytic converter.
Service Engine Soon indicator lamp
for Canadian models.
If the fuel filler cap is not on tight
enough, the OBD system can detect
leaking vapor and the indicator lamp will
light up. If the fuel filler cap is then tight-
ened, the indicator lamp will usually go out
after a short period of time.<

Reference
At a glance
Controls
Driving tips
Mobility
105
Mounting compact wheel
1.Unscrew the lug bolts and remove the
wheel
2.Remove accumulations of mud or dirt
from the mounting surfaces of the
wheel and hub. Clean the lug bolts
3.Position the new wheel or compact
wheel. Secure the wheel by turning at
least two lug bolts into opposite bolt
holes
4.Screw in the remaining lug bolts.
Tighten all the bolts securely in a diag-
onal pattern
5.Lower the jack and remove it from
beneath the vehicle
6.Tighten the lug bolts in a diagonal pat-
tern
7.Check and correct the tire inflation
pressure at the earliest opportunity.
Protect valve stems and valve stem
seal caps against dirt and contamina-
tion. Dirt in valve stems is a frequent source
of gradual air loss.<
After mounting the compact wheel or cor-
recting the inflation pressure, reinitialize
the Flat Tire Monitor, refer to page 53.
The vehicle jack is designed for
changing wheels only. Do not attempt
to raise another vehicle model with it or to
raise any load of any kind. To do so could
cause accidents and personal injury.
To ensure safety, always have the lug bolts
checked with a calibrated torque wrench to
ensure that they are tightened to the spec-
ified torque of 101 lb ft/140 Nm as soon as
possible.<
Stow the defective wheel in the luggage
compartment.
When you mount wheels other than Genu-
ine BMW light-alloy wheels, different lug
bolts may also be required.
Replace the defective tire as soon as pos-
sible and have the new wheel/tire bal-
anced.
Driving with the compact wheel
Drive reservedly and do not exceed a
speed of 50 mph/80 km/h. Do not
deactivate DSC, as otherwise unstable
driving conditions may result.<
The driving characteristics change, for
example reduced track stability on braking,
extended braking distance, and altered
self-steering characteristics in the limit
range. In conjunction with winter tires,
these characteristics are more pro-
nounced.
Only one compact wheel may be
mounted. You should re-equipping to
wheels and tires of the original size as
quickly as possible.<
Battery
Battery care
The battery is 100% maintenance-free, i.e.,
the electrolyte will last for the life of the bat-
tery when the vehicle is operated in a tem-
perate climate.
Please contact your BMW Sports
Activity Vehicle Center with any ques-
tions concerning the battery.<
Do not disconnect the battery when
the engine is running. If you do so, the
ensuing voltage surge will damage the
vehicle's onboard electronics.<
Indicator lamp
The battery charge-current indica-
tor lamp lights up:
The battery is no longer being
charged. There is a defect on the alternator
V-belt or charge current circuit of the alter-
nator. Contact the nearest BMW Sports
Activity Vehicle Center.
Do not continue driving if the V-belt is
defective. The engine could be dam-
aged due to overheating.
Moreover, an increased amount of force is
required for steering if the onboard supply
voltage falls dramatically.<

Everything from A to Z
120 Bottle holder, refer to
Beverage holders 67
Brake fluid 96
Ð indicator lamp 96
Ð level 96
Ð replacing 96
Brake force display 54
Brake lamps
Ð defect 57
Ð indicator lamp 12
Ð replacing the bulbs 102
Brake pads and rotors
Ð breaking-in procedure 76
Brakes 77, 96
Ð ABS 77
Ð brake fluid 96
Ð break-in procedure 76
Ð handbrake 38
Ð indicator/warning
lamp 38
Brake system
Ð brake-fluid level 96
Ð brake pads 96
Ð corrosion 77
Ð disc brakes 76, 77
Ð indicator lamp 96
Ð rotors 76, 77
Brake wear warning
Ð brake pads 96
Ð indicator lamp 96
Break-in procedures 76
Bulbs and lamps 99
Buttons in steering
wheel 14
C
California Proposition
65 Warning 98
Capacities 117
Car care, refer to Caring for
your vehicle brochure
Car-care products, refer to
Caring for your vehicle
brochure
Care, refer to Caring for
your vehicle brochureCargo area 71
Ð capacity 116
Ð cover 71
Ð floor cover 72
Ð folding rear seat
backrest 71
Ð increasing volume 71
Ð lashing eyes 73
Ð manual unlocking 21
Ð opening, remote
control 19
Ð opening/closing 21
Ð opening from the
outside 21
Ð sockets 73
Ð volume 116
Cargo bay, refer to Cargo
area 71
Cargo loading 78
Caring for leather, refer to
Caring for your vehicle
brochure
Caring for the carpet, refer
to Caring for your vehicle
brochure
Caring for the vehicle finish,
refer to Caring for your
vehicle brochure
Car keys, refer to Key
set 18
Car phone preparation 70
Car wash 77
Car wash, refer to Caring
for your vehicle brochure
Catalytic converter, refer to
High temperatures 76
Central locking system 18
Ð interior 20
Changes, technical, refer to
For your own safety 6
Changing a wheel 103
Check Gas Cap
Ð indicator lamp 12, 84
Checking inflation
pressure 86
Child's seats, refer to
Child-restraint
systems 34
Child-restraint systems 34
Child-safety locks 36
Chock 103Chrome parts, care, refer to
Caring for your vehicle
brochure
Cigarette lighter
Ð front 69
Ð rear 69
Circulation of air, refer to
Recirculated-air
mode 61, 64
Cleaning, vehicle, refer to
Caring for your vehicle
brochure
Cleaning the windshield 42
Cleaning windows,
reservoir 94
Clean the rear window 42
Clock 46
Ð 12/24 hour mode 48
Ð setting, refer also to
Owner's Manual for
Radio/Onboard
computer 46
Clutch 76
Ð breaking in 76
Cockpit 10
Cold start, refer to Starting
the engine 37
Comfort operation
Ð panorama glass roof 20
Compact wheel
Ð wheel changes 103
Compression ratio, refer to
Engine data 114
Computer 47
Computer, functions 48
Condensation, refer to A/C
operation 61, 64
Connecting a vacuum
cleaner, refer to Lighter
socket 69
Consumption, refer to
Average fuel
consumption 48
Consumption indicator,
refer to Fuel gauge 45
Contents 3
Controls, refer to
Cockpit 10
Convenience operation
Ð from outside 20
Ð windows 20