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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N57 / M57 Turbo Diesel Discussions - 335d > Where to buy Cat replacement? "4D16 SRC System, efficiency" code



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      10-09-2016, 10:58 PM   #45
Greck
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I replaced the SCR cat, but the issue is still there... Have no idea what to do next...
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      10-09-2016, 11:09 PM   #46
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      10-11-2016, 05:28 PM   #47
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Does it tell you what the minimum conversion % is to set the 4d16 code? Its obviously working, just dont know what is considered an acceptable conversion %

What is the SCR catalytic converter ageing factor temperature a measurement of? That number stands out as unusual
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      10-11-2016, 05:33 PM   #48
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Quote:
Originally Posted by Hoooper View Post
Does it tell you what the minimum conversion % is to set the 4d16 code? Its obviously working, just dont know what is considered an acceptable conversion %
No, it does not tell anything else except this pictures...


Quote:
Originally Posted by Hoooper View Post
What is the SCR catalytic converter ageing factor temperature a measurement of? That number stands out as unusual
Agree, I don't know what does it mean but is looks weird
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      07-26-2018, 06:09 PM   #49
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Quote:
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No, it does not tell anything else except this pictures...



Agree, I don't know what does it mean but is looks weird
I know this is an old thread but was curious if this issue was ever solved. I'm on the cusp of replacing the Cat myself after the stealer replaced the two NOX sensors and urea tank.
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      08-04-2018, 09:33 PM   #50
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CAT

If you're under 100,000 miles BMW should replace the CAT for free. I got a letter stating that a year or two ago. Same for Turbo's.
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      08-16-2018, 05:46 PM   #51
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If you're under 100,000 miles BMW should replace the CAT for free. I got a letter stating that a year or two ago. Same for Turbo's.
My car has 109k on it currently. I'll be installing a new to me, low mileage cat here shortly. Hopefully, this will resolve the SCR efficiency issue.
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