Emission System - Descriptions/Operation: Overview

Bulletin Number:
00 01 81 (2001)

Date:
February, 1982

Group: 00
Maintenance and General Hints

Subject:
BMW 528e, 733iA/633CSiA - 50 STATES VERSION


BMW of North America is proud to announce the new BMW 528e, 733i and 633CSi models. The engineering of these models meets the latest emission standards.

In order to simplify maintenance and through the utilization of modern micro-processing techniques, BMW has developed the so-called Motronic, micro-computer control system for regulating ignition timing and fuel ignition quantity which, in addition, has been laid out in such a way as to reduce the harmful exhaust emissions to a minimum.

All other components of the emission control system have been retained.

These are:


- Oxygen sensor
- Catalytic converter
- Evaporative control system
- Crankcase emission control system
- Service warning light.


The engine and emission control systems of the above mentioned models are designed to run on unleaded fuel. Always use unleaded fuel with at least 91 RON or 87 AKI.

WARNING:
If the car is operated even only for a short period of time on fuel containing lead, both oxygen sensor and catalytic converter are damaged.

To fulfill the EPA Emission Standards, oxygen sensor and catalytic converter must be replaced after using fuel containing lead.