9-3 Coupe (9400) L4-2.0L Turbo (B205) (2001)
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Catalytic Converter: Service and Repair
Front Exhaust Pipe With Catalytic Converter B205L/R, B235R
Dismantling
When changing the front exhaust pipe, the oxygen sensors must be removed and fitted to the new exhaust pipe. Apply Molykote 1000, part no.30 20 971
to the threads on the oxygen sensors before fitting.
IMPORTANT
The leads of the oxygen sensors must not be twisted. Twisted leads are susceptible to vibration and the leads could break.
Since the oxygen sensors are sensitive to impact and shock, they must be handled with care.
Tightening torque: 55 Nm (lbf ft)
1. Remove the bypass pipe with valve. Keep the O-ring where the pipe is connected to the turbo inlet pipe.
2. Remove the exhaust manifold heat shield and the top engine cover.
3. Unplug the oxygen sensor connectors.
Cut the cable tie securing the oxygen sensor cables and adjust their position so that they run free when the pipe is removed
