E30 series BMW 3

since 1983-1994 of release

Repair and car operation

+ 1. Maintenance instruction
+ 2. Maintenance
+ 3. Engine
+ 4. Cooling system
+ 5. Heating and ventilation
+ 6. Fuel system
- 7. Exhaust system
   + 7.1.2. Exhaust system of cars 318i
   - 7.2. System of decrease in toxicity of exhaust gases
      7.2.2. Self-diagnostics of system of injection of Motronic
      7.2.3. Processor block (ECU block)
      7.2.4. Sensors of system of automatic control of the engine
      7.2.5. System of compulsory ventilation of a case (PCV system)
      7.2.6. Catching system паров gasoline (EVAP system)
      7.2.7. Catalytic converter
+ 8. Transmissions
+ 9. Coupling
+ 10. Brake system
+ 11. Running gear
+ 12. Body
+ 13. Electric equipment
+ 14. Good advice


7.2.7. Catalytic converter


Catalytic converter of the M10 engine

For decrease in emissions in the atmosphere of hydrocarbons, carbon monoxide and nitrogen oxides all cars considered in the management, are equipped with the converter providing at the expense of oxidation-reduction reactions decomposition of specified three components, turning them in harmless nitrogen, carbon dioxide and water.


Periodically check a condition of fastenings of the converter and its case. Be convinced of absence of leakage of gases. Check integrity of the heatinsulating screen.

Precautionary measures

In order to avoid a converter exit out of operation observe the following rules:

1. It is forbidden to use etilirovanny gasoline.

2. Regularly check serviceability of systems of ignition and a food.

3. Car operation at interruptions in cylinders is strictly forbidden.

4. It is forbidden to switch off ignition at big turns of the engine, or to stop the engine in sharp pressing a butterfly valve pedal at the switched-off ignition.

5. The parking in places with inflammable subjects is forbidden.

6. At serviceable power supply systems and ignitions the unit is calculated on run of 90-160 thousand km. According to the contents WITH in exhaust gases it is possible to estimate a converter condition approximately.

7. The "sulphurous" smell from an exhaust pipe on the new car is allowed.