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Re: e34 Oxygen Sensor Replacement (archive)

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Posted by Paul Shovestul on July 30, 2001 at 10:24:27:

In Reply to: e34 Oxygen Sensor Replacement posted by Bill Wise on July 30, 2001 at 09:14:59:

I didn't need to drop the exhaust to change it on my '93 525i 5 spd. You should also know that changing the sensor didn't fix the problem in my car. The 1221 code doesn't necessarily mean the sensor is bad, it can mean the DME senses the O2 sensor output in not in the correct range. I had to change my plugs 48K in order to keep the light out, even with the new sensor. If your plugs are over due for changing, I do this first. Disconnect your battery for 30(?) minutes to reset the light.

Paul Shovestul

I am unable to get a sensor for about a week. The check engine light is on and the diagnostic codes (1221) indicate that it has failed. My question is, I need to drive about 500 miles before I get the replacement sensor. Will this cause me problems by driving it before I replace sensor? Also, I haven't located it on the exhaust yet. Is it difficult to access to change on a 95 525i?


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