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Old 05-10-2019, 11:05 AM
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Join Date: Jan 2018
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Dieselfan is on a distinguished road
SCR System Efficiency Code

My X5D throw a code 4D16 SCR system efficiency.

I erased it a few days and about 100 miles gone by but it is back.

What could be the issue here?
It has about 112K miles and it's an 2010.
TIA.
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Old 05-10-2019, 04:01 PM
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Bad NOx sensors or urea dosing module. Just guesses but both are the subject of a 10 year or 120k miles extended warranty for certain diesel X5s. Worth getting it checked out but do your research and get a copy of the BMW NA letter first. Unless your dealer and service advisor are good and will put in the time to get this done for you. Left to their own devices they'll just charge you for the repair and parts.
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Old 05-10-2019, 10:37 PM
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Quote:
Originally Posted by josiahg52 View Post
Bad NOx sensors or urea dosing module. Just guesses but both are the subject of a 10 year or 120k miles extended warranty for certain diesel X5s. Worth getting it checked out but do your research and get a copy of the BMW NA letter first. Unless your dealer and service advisor are good and will put in the time to get this done for you. Left to their own devices they'll just charge you for the repair and parts.
Thanks for the response.
My dealer SA is very clueless, but I've got them to replaced my active tank for free about 6 months ago.

I will be bring it in to the same dealer and I will make sure the work is done with my consent.
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04 POS Chebby S10 Crew
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