Quote:
Originally Posted by ps2cho
I would probe the O2 sensor wire under passenger seat and ensure that you are getting a good reading first before adjusting the EHA (unless you know it has been tampered with before).
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I replaced the O2 sensor at about 206,000 miles, but I suppose it does not hurt to check, maybe I got a slow or defective sensor... 
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2006 BMW M5 "Heidi" @ 109,000 miles
2005 MBZ C55 AMG "Lorelai" @ 165,000 miles
1991 MBZ 300E "Benzachino II" @ 165,000 miles
1990 MBZ 500SL "Shoshanna" @ 118,000 miles
(On the hunt for a good used M103 engine as of 6/10/23, PM me if you have one to sell!)
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