BMW Z4 Technical Information download pdf (Page 6)

Maintenance Program

The BMW Maintenance Program has been

devised with the following objectives: to maxi-

mize vehicle safety, reliability, and resale value by

minimizing breakdowns resulting from wear, and

minimizing cost and inconvenience by comput-

ing maintenance intervals based upon the spe-

cific manner in which each individual vehicle is

driven.

Maintenance intervals on motor vehicles have

conventionally been specified based upon

accumulated mileage. However, the type of

driving conditions has a major influence on

routine maintenance requirements; distance

traveled is only one of the significant factors.

A vehicle driven for 50,000 miles of short trips

in the city with numerous cold starts, pro-

longed periods of idling, stop-and-go driving,

and high engine speeds during acceleration

requires more frequent maintenance intervals

than a vehicle driven for 50,000 miles for long

distances at low engine speeds primarily at

operating temperature.

The advanced technologies at BMW have led to

the development of the unique BMW service

interval indicator which computes the actual opti-

mum maintenance requirements based not only

upon the accumulated mileage, but taking into

account important factors such as engine cool-

ant temperatures, high or low engine speeds,

short or long trip driving, and number of vehicle

starts. The maintenance interval may therefore

be maximized with considerable savings to own-

ers of vehicles subjected to light duty.

The Service Interval Indicator consists of a

mileage reading, and the inscriptions “OIL SER-

VICE” and “INSPECTION”.

Whenever the ignition is switched on, the display

shows the next scheduled type of service and the

remaining distance until the service should be

performed. The distance is based on your driving

style.

If the maintenance interval has been exceeded, a

“--” symbol reminds you of the urgent need for

servicing. In the interests of road safety and reli-

ability, you should avoid driving your BMW

when the “--” symbol is showing, and have the

essential maintenance work performed without

delay.

After each maintenance is performed the service

indicator is reset in order to compute the next

service interval.

If the Service Interval Indicator displays an illogi-

cal reading, or if there is no display, consult a

BMW center.

If the speedometer, tachometer or coolant tem-

perature gauge should develop a fault, the ser-

vice interval indicator will probably cease to

operate correctly as well, since it depends on

correct speed, distance and temperature read-

ings. The fault must be located and rectified by a

BMW center.

A detailed list of all maintenance operations

included in each of the elements of the BMW

Maintenance Program is found on pages3-13.

These elements are as follows:

Quality Certification I will be performed by your

selling center and certified on the following page.

The performance of certain subsequent mainte-

nance elements, as required by the BMW New

Vehicle Limited Warranty, will be specified at

intervals computed by the BMW service interval

indicator as follows:

– Oil Service: Engine oil changed with the

engine at operating temperature.

Note: change oil at least once a year.

Your BMW is factory-equipped with a newly-

developed synthetic engine oil. At the time of

the printing of this booklet the only approved

engine oils are: Castrol TWS Motorsport SAE

10W-60 Synthetic, or Castrol Formula RS

10W-60 Synthetic (BMW part number 07 51 0

009 420).

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