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7 Series - F01 (2009 - current)
The new re-designed 7 series leads off the BMW Fxx chassis code!

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  #1  
Old 03-17-2014, 10:14 AM
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Mein Auto: 750i (F01)
Question When or Have Any of You Replaced O2 Sensor or Cats?

Curious about this... With all of these excessive "Carbon Buildup"!

Have any of you had to replace yours? If so, under warranty or do it yourself?
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  #2  
Old 03-17-2014, 02:57 PM
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Over 50 views and no one responds?

So I take it that means no of you have replaced sensors or cats on your car since ownership?
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Old 03-17-2014, 03:44 PM
FML JK FML JK is offline
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i havent and have 41k on my car.
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Old 03-17-2014, 09:17 PM
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I have 86k, I did have to replace the cats, but that was because the turbos went, all under warranty. typically I always thought you should replace the sensors every 100k
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Old 03-17-2014, 09:53 PM
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O2 sensors should be replaced every 100K but the catalysts shouldn't get plugged up and need replacement. I'd honestly take them out and recode the check engine light to get better performance.
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Old 03-17-2014, 10:05 PM
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I've been monitoring my ride with a scan tool. It's giving a constant "incomplete test or fail" for the O2 sensor and cat.
I initially got it to monitor the notorious injector issue. It also happens to be time for a state inspection. Here in Texas, two issues or incompletes will not pass. Car has 46k miles. I never had no issues like this on my e65 which had over 65k miles when sold.
Now here's the thing: typically newer cars have a "drive cycle" that resets everytime the battery gets disconnected. Well my battery had been flaking in this cold weather and so I've been charging it. I'm now starting to wonder if the car is losing power and memory? And not reading this cycle?
This shyt is getting old...

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Old 03-18-2014, 12:42 PM
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it takes about 100 miles sometimes for the system to be ready after you undo the battery! I would drop the car off at BMW and have them look at it the next time you drop it off for some other servicing, otherwise you'll be in a world of hurt with inspection time!
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