Page 145 of 217
145n
RepairsIndexOverview Controls Car care Technology Data
Engine compartment Ð BMW 528i1 Engine oil dipstick149
2 Reservoir for brake fluid (under the
housing of the microfilter)152
3 Auxiliary terminal for jump
starting182
4 Coolant expansion tank151
5 Engine oil filler neck149
6 Reservoir for intensive-cleaning
system
*
148
7 Reservoir for headlamp washer
* and
windshield washer system148
Page 146 of 217
146n
Engine compartment Ð BMW 540i
390us621
Page 147 of 217
147n
RepairsIndexOverview Controls Car care Technology Data
Engine compartment Ð BMW 540i1 Reservoir for brake fluid (under the
housing of the microfilter)152
2 Auxiliary terminal for jump
starting182
3 Engine oil dipstick149
4 Engine oil filler neck149
5 Coolant expansion tank151
6 Reservoir for intensive-cleaning
system
*
148
7 Reservoir for headlamp washer
* and
windshield washer system148
Page 148 of 217

148n
Washer fluids Washer nozzlesHeadlamp
* and windshield
washer system
Capacity in US quarts (liters).
Windshield washer:
approx. 3.7 (3.5) Ð sedan
approx. 6.3 (6.0) Ð sport wagon
Incl. headlamp-washing system:
approx. 6.3 (6.0)
Fill with water and Ð if required Ð with a
washer antifreeze (according to manu-
facturer's recommendations).
We recommend that you mix the
washer ßuid before adding it to the
reservoir.< 390de082
Intensive-action washer
reservoir
*
Capacity approx. 1.1 US quarts
(1.0 liter).
Fill with intensive-action washer fluid.
It resists freezing to approx. -177
(-276) and is available from your
authorized BMW center.
Antifreeze agents or intensive-
action washer fluids for the
washer systems are highly flammable.
For this reason, keep them away from
sources of flame and store them only in
their original containers. Store them so
that they are inaccessible to children.
Comply with the instructions on the
containers.< 390de083
Windshield washerWindshield:
The spray from the nozzles should
be directed so as to ensure effective
cleaning, even at high speeds. Use
a needle to adjust the nozzles as
required, or have them adjusted at your
authorized BMW center.
Rear window:
Have this system adjusted by your
BMW center as required.Headlamp washer systemHave the nozzles adjusted by your
BMW center as required.
Page 149 of 217

149n
RepairsIndexOverview Controls Car care Technology Data
Engine oilChecking oil level1 Park the vehicle on a level surface.
2 Shut the engine off after it has
reached normal operating
temperature.
3 After approx. 5 minutes, pull the
dipstick out and wipe it off with a
clean lint-free cloth, paper towel, or
similar material.
4 Push the dipstick all the way into the
guide tube and pull it out again.
5 The oil level should be in between the
two graduations on the dipstick.
As with fuel economy, oil consumption
is directly influenced by your driving
style and vehicle operating conditions.390de076
The oil volume between the two marks
on the dipstick corresponds to approx.
1.1 US quarts (1 liter). Do not fill beyond
the upper mark on the dipstick. Excess
oil will damage the engine.460de189
To add oilWait until the level has dropped to just
above the lower mark before adding oil.
However, do not wait until the oil level
drops below the lower mark.
BMW engines are designed to op-
erate without oil additives; the use
of additives could lead to damage in
some cases. This is also true for the
manual transmission, the automatic
transmission, the differential, and the
power steering system.< 390de077
Page 150 of 217

150n
Engine oilSpecified engine oils The quality of the engine oil selected
has critical significance for the opera-
tion and service life of an engine. Based
on extensive testing, BMW has ap-
proved only certain engine oils.
Use only approved "BMW High Perfor-
mance Synthetic Oil."
If you are unable to obtain "BMW High
Performance Synthetic Oil," you may
use small amounts of synthetic oil in
between oil changes. Only use oils with
the specification API SH or higher.
Ask your authorized BMW center
for details concerning the specific
"BMW High Performance Synthetic Oil"
or "synthetic oils" which have been ap-
proved.<
You can also call BMW of North
America at 1-800-831-1117 or visit
this website: www.bmwusa.com to
obtain this information.
Viscosity ratingsViscosity is the oil flow rating as estab-
lished in SAE classes.
The selection of the correct SAE class
depends on the climatic conditions in
the area where you typically drive your
BMW.
Approved oils are in SAE classes
5W-30 and SAE 5W-40.<
These oils may be used for driving in all
ambient temperatures.
530us050
Page 151 of 217

151n
RepairsIndexOverview Controls Car care Technology Data
Engine oil Coolant
Comply with the applicable envi-
ronmental laws regulating the dis-
posal of used oil.<
Recommendation: Have the oil
changed by your BMW center.
Continuous exposure to used oil
has caused cancer in laboratory
testing. For this reason, any skin areas
that come into contact with oil should
be thoroughly washed with soap and
water.
Always store oil, grease, etc., out of
reach of children. Comply with all warn-
ing labels and information on lubricant
containers.<
Do not add coolant to the cooling
system when the engine is hot. If
you attempt to do so, escaping coolant
can cause burns.
To avoid the possibility of damage later
on, never use anything other than fac-
tory-approved, nitrite and amino-free
extended-duty antifreeze with corrosion
inhibitor. Your authorized BMW center
is familiar with the official specifica-
tions.
Antifreeze and anticorrosion agents are
hazardous to health. You should always
store them in their original container
and in a location which is inaccessible
to children.
Extended-duty antifreeze with corrosion
inhibitor contains the flammable sub-
stance ethylene glycol. For this reason,
do not spill antifreeze with corrosion in-
hibitor on hot engine parts. It could
catch fire and cause serious burns.<
Comply with the applicable envi-
ronmental laws regulating the dis-
posal of extended-duty antifreeze with
corrosion inhibitor.<
Checking coolant levelCorrect coolant level when the engine
is cold (approx. 687/206):
Unscrew the cap from the expansion
tank.
The coolant level is correct when the
end of the red float is aligned with the
upper edge of the filler opening (refer
to the arrow in the illustration), or max.
0.8 in (2 cm) higher, for instance up
to the mark on the float (see also the
schematic diagram next to the cap).380de081
Page 152 of 217

152n
Coolant Brake fluidAdding coolantWait until the engine cools before re-
moving the cap from the expansion
tank. The needle of the coolant gauge
in the instrument cluster must be lo-
cated in the blue zone; otherwise, there
is a danger of scalding.
1 Start by turning the cap counter-
clockwise. Pause to allow any
accumulated pressure to escape,
then open.
2 If the coolant is low, slowly add
coolant until the correct level is
reached Ð do not overfill.
The coolant is a mixture of water and
extended-duty antifreeze with corrosion
inhibitor. Always maintain the pre-
scribed all-season 50:50 mixture ratio
for year-round protection against inter-
nal corrosion. No other additives are re-
quired.
Replace the coolant every four years.If the indicator lamp for the
brake hydraulic system appears
or if the "CHECK BRAKE FLUID"
warning appears in the Check
Control: The brake fluid level is
too low in the reservoir.
The brake fluid reservoir is located
under the microfilter housing on the
driver's side of the car. Should you de-
termine that the brake fluid is low, refer
the problem to your BMW center, who
can trace and rectify any sources of
leakage when refilling the reservoir.
Your BMW center is familiar with the
specifications for approved brake fluids
(DOT 4).
Brake fluid loss results in extended
pedal travel. For this situation, refer to
the notes on page 130.
Brake fluid is hygroscopic, that is,
it absorbs moisture from the air
over time.
In order to ensure the safety and
reliability of the brake system, have the
brake fluid changed every two years by
an authorized BMW center. Refer also
to the Service and Warranty Information
Booklet (US models) or to the Warranty
and Service Guide Booklet (Canadian
models).
Brake fluid is toxic and damages the
vehicle's paint. You should always store
it in its original container and in a loca-
tion which is out of reach of children.
Do not spill the fluid and do not fill the
brake fluid reservoir beyond the "MAX"
mark. The brake fluid could ignite upon
contact with hot engine parts and cause
serious burns.<
Comply with the applicable
environmental laws regulating the
disposal of brake fluid.<