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RYANbmw (guest)
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I have a BMW 330ci convertible, it recently went for mot and it failed on the lambda sensor but im not sure what one it is before the cat, or after the cat any help would be great thanks

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This post was auto-generated based upon a question asked on our tech article page here: Pelican Technical Article: Replacing your 3-Series E30 Oxygen (Lambda) Sensor

Old 07-20-2012, 11:41 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
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Location: New England
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The oxygen sensors mounted close to engine, in the exhaust manifold are pre-catalyst. The oxygen sensors underneath the vehicle, behind catalytic converter are post-catalyst

- Nick

Old 07-20-2012, 11:41 AM
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