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5-Series (E12,E28, E34, E39, E60) Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)

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Old 07-04-2007, 11:55 AM   #1 (permalink)
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O2 sensors

1994 530I auto

What are the downside issues when using an aftermarket 4-wire O2 sensor and splicing the wires to the BMW connectors?

The upside is about $200 more in my pocket for gas...

Anyone done this before?
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Old 07-08-2007, 09:20 PM   #2 (permalink)
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My question, can someone with knowledge add to this posting please?
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Old 07-08-2007, 10:30 PM   #3 (permalink)
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The down side of using these cheaper sensors is that you leave yourself open for connection problems due to soldering imperfections. The O2 signal runs at less than 1 volt (roughly .1-.9 volts) so it doesnt take a whole lot of resistance to corrupt the reading. Ive never tried using one of these because I have heard from several people that they cause problems. I cant honestly say this from experience because I only use OEM.
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