Car exhaust system BMW 5 Series E39

Exhaust system — general information
The exhaust system consists of two front exhaust pipes, which in the 520i, 523i and 525tds models are combined before the catalytic converter. This is followed...

Exhaust system device
Exhaust system of models 520i, 523i 1 - nut 2 - Sealing gasket for triangular flange 3 - Front exhaust pipe with catalytic converter 4 - tightening sleeve 5 -...

Operation of the catalytic converter
All car engines are equipped with a catalytic converter to clean exhaust gases. The catalytic converter consists of a ceramic honeycomb body "3" covered with a...

Handling of catalytic converters in vehicles
To avoid damage to the oxygen sensor and catalytic converter, the following instructions must be strictly observed: Petrol engines Be sure to refuel with...

Removal and installation of the exhaust system
All parts of the exhaust system can be replaced individually. Caution: When installing exhaust system components, ensure that the components are tightly...

Replacing the subsequent muffler
The serial subsequent silencers can be replaced separately with new parts. A standard chain cutter, for example from HAZET, is required to disconnect the...

Removal and installation the oxygen sensor
Caution: When applying a protective coating to the underbody, the oxygen sensor must be covered. Removal Remove the engine cover above the injectors, see page...

Checking the exhaust system for leaks
In vehicles with a regulated catalytic converter, a leak in the exhaust system before the oxygen sensor can cause the following problems: difficulties...

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