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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 10-16-2005, 08:35 PM   #1 (permalink)
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narroww band oxygen sesor??

does the e36 use a wideband or narrow band oxygen sensor
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Old 10-16-2005, 08:41 PM   #2 (permalink)
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Narrow... either its a yes sent to the ECU or a no... but in numerical form by way of electric current drawn. Thats for the aft cat sensors... as they only deal with good or bad cats... now the front two... on obd 2 cars... I'd have to check on the band width... cause they directly deal with A/F ratios.

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Old 10-16-2005, 10:20 PM   #3 (permalink)
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I believe the front cats are wide band. The output voltage varies over a set range with pretty decent resolution.
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Old 10-17-2005, 02:47 PM   #4 (permalink)
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I have OBD1 so does this apply to me or what do i have since i got a 95 325i
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Old 10-17-2005, 04:12 PM   #5 (permalink)
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Narrow band ...

All BMW's are narrow band, in fact most all street vehicles are narrow band. They have been made from a couple of different materials over the years but they are still narrow band sensors ( operates between 0.0-1.0 volt with optimal being approx. .45v ) Wide band Air/Fuel sensors are generally found in race/off road applications where fuel mixtures are desired away from the EPA optimal 14.7:1 ratio.

Here's a good explanation article: Oxygen Sensor Types









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