BMW 5 Series E39

since 1996-2001 release

Repair and operation of the car

+ Introduction
+ Maintenance instruction
+ Current leaving and service
+ Engine
+ Cooling systems, heating
- Power supply system and release
   + Power supply system
   + System of injection of the petrol engine
   + Power supply system of the diesel engine
   - System of production of the fulfilled gases
      Operation of the catalytic converter
      Security measures for cars with the catalytic converter
      Removal and installation of system of release
      Replacement of the main muffler
      Removal and installation of the sensor of oxygen
      Check of tightness of system of release
+ Engine electric equipment
+ Manual transmission
+ Automatic transmission
+ Coupling and power shafts
+ Brake system
+ Suspension bracket and steering
+ Body
+ Onboard electric equipment
+ Schemes of electric equipment
+ System of onboard diagnostics


Check of tightness of system of release

Leakage of system of release with the catalytic converter in front of the sensor of oxygen can result in such malfunctions as difficulty at start of the engine. At the same time the engine stops, vibrates idling, increases speed breakthroughs.

Check condition: The engine has to be cold or slightly warm.


1. Start the engine and check system of release for tightness. Close an exhaust pipe rags. Check existence of leak of the fulfilled gases through flange connections (aurally - on hissing - or a hand).

2. Spray spray of the place of connections of a head of cylinders with a final collector and a collector with a reception pipe and check existence of bubbles.