S40 L4-1.9L Turbo VIN 29 B4204T3 (2001)
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the rear heated oxygen sensor (HO2S) (count the number of turns)
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the rear engine cover
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Slacken off the clamp around the rear exhaust pipe
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the nuts. Remove the front exhaust pipe
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gasket
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the front exhaust pipe from the rear exhaust pipe.
Exhaust pipe front/catalytic converter, installing
NOTE: Ensure that there is no exhaust leakage.