The BMW Maintenance System helps maintain your vehicle's road safety and operational safety. Comfort-related aspects, such as the timely change of filters for the air inside the vehicle, are taken into consideration. The goal is to optimize maintenance with respect to low total cost of ownership. If you should sell your BMW one day, consistent service and maintenance will prove to your advantage.
The service interval display shows you when an oil service, an inspection – always alternating between I and II – or a brake fluid change is due. The special feature is that the service intervals are calculated according to your BMW's individual driving conditions instead of from fixed mileage increments.
The technology developed for this takes your personal driving style into account, as well as your BMW's driving conditions. After all, short distance driving, i.e. frequent cold starts, or driving off at high engine speeds, affect your BMW differently from long-distance driving with the engine at consistent operating temperature.
The calculation of the service intervals covers practically every kind of operating situation. If you drive very rarely, however, you should have the oil changed at least every two years, since engine oil deteriorates over time regardless of use.
For additional information on required maintenance intervals and procedures, please refer to the Service and Warranty Information Booklet for US models, or the Warranty and Service Guide Booklet for Canadian models.
As a precaution against rust, it is advisable to have the body checked for damage from rocks or gravel at the same time, depending upon operating conditions.
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BMW 2004 325Ci Coupe Owner's Manual
