E46 o2 sensor

Discuss Non-E30 BMW's in here - No selling!

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Rik178m
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Post Sat Nov 08, 2008 5:05 pm

Is an O2 sensor and a lambda sensor the same thing? Where abouts is it on the car? I have a yellow engine warning light which keeps coming on and off which is emissions. Been told that its the O2 sensor or the cat.
Cloggy Saint
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Post Sat Nov 08, 2008 5:08 pm

On an E30 it's in the exhaust down-pipe.
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robbo86
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Post Sun Nov 09, 2008 10:03 pm

My mate has the same problem..... doesnt answer your question though
town325i
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Post Sun Nov 09, 2008 10:10 pm

you more than likely find its the cat that is knackered get it on a diagnostics computer
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robbo86
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Post Mon Nov 10, 2008 12:48 am

meh, he declined my offer to try and fix it for him................ probably best
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Rik178m
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Post Mon Nov 10, 2008 9:46 am

Yeh I'm going to soon but same as everyone I'm skint! is an O2 sensor the same as a lambda?
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blingsta
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Post Mon Nov 10, 2008 11:35 pm

yes it is mate... what engine size you got? mines a 325 and they have 4 lamda sensors !!!! 2 before the cat and 2 after the cat !! £120 each from BMW... :cry:
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Rik178m
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Post Tue Nov 11, 2008 11:51 am

330. Sheeeet! Might just leave it for now then as it wont do any damage. Looked on ecp for a cat and they were £900 odd. :cry: