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BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > N47 and N57 Turbodiesel Engine / Drivetrain / Exhaust Modifications > Has anyone fully deleted DPF, cat and EGR on N57?
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      10-26-2017, 12:22 AM   #23
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Quote:
Originally Posted by Len_Beach View Post
Have a look at the E90 330d LCI as the N57 was launched in the E90 and it's largely the same as the F30 unit aside from a slightly higher rev limit and fuel pressure that yields the higher stock power and torque figures.
I called a local time shop in Houston and they told me they do it all the time... I searched all over the internet for the hardware but was unsuccessful... I'm waiting for them to give me a price... was told that they need to request pricing for the downpipe... In the meantime I will see what I can find under the F30 and E90... that's one thing I haven't fully understood.. as the N57 has been used in so many cars where really the differences lie...
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      10-26-2017, 09:35 AM   #24
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Originally Posted by jnecr View Post
N57 is in the E90 335d as well.
Whoa, didn't catch this when you posted it. The USA/CA 335d has an M57. The first applications of the N57 was the F10 5 series (in 2013 or so) and the F15 X5 (2014).
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      10-26-2017, 09:48 AM   #25
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Originally Posted by PlayTookies View Post
Thanks for that even if it's not what I wanted to hear... I guess I will have to start learning how to work on these parts
Not sure if everyone asking about N57 knows, but the USA/CA N57 is quite different than the 2009-2011 E90 335d and E70 X5d, which had the M57 engine. The M57 uses a twin-turbo sequential setup, while the N57 has a single non-sequential setup. That requires a different downpipe. Also, for the EU/UK guys, all USA/CA cars had a different EGR, DPF (DOC) and all have SCR/DEF. And those cars all have electronic/electrical controls rather than the vacuum system operating the EGR and other stuff.

The newer DDE tested on the E90/E70 USA cars has to be bench-flashed (cannot be flashed in the car) to remove all the OBD/CES checks to pass emissions (no-one does sniff tests on diesels, so "all" you need to do is to get a tune.) (If you search you'll find 2-3 names of people doing them.) You cannot code out those checks; a tune is required.

However, dieselgate has sharpened the EPA's interest in enforcing things, and there are no shops advertising their services in this regard, as none of them want the $25K-$50K fine. One in particular stopped doing tunes while they got some procedures in place: you MUST sign a waiver saying it's for off-road use.

One final thing: there were only around 10K E90 335d imported to the USA/CA. There are more X5d's, not sure how many. The F10 535d and F15 X5d probably have sold less numbers. So it's a small market and not really worth it for shops to risk big fines and to design and manufacture the dp's and do the tune.
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      10-26-2017, 06:35 PM   #26
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Quote:
Originally Posted by floydarogers View Post
Quote:
Originally Posted by jnecr View Post
N57 is in the E90 335d as well.
Whoa, didn't catch this when you posted it. The USA/CA 335d has an M57. The first applications of the N57 was the F10 5 series (in 2013 or so) and the F15 X5 (2014).
The N57 never featured in a 335d. They were all variations of the twin turbo N57.

Quote:
Originally Posted by floydarogers View Post

Quote:
Originally Posted by PlayTookies View Post
Thanks for that even if it's not what I wanted to hear... I guess I will have to start learning how to work on these parts
Not sure if everyone asking about N57 knows, but the USA/CA N57 is quite different than the 2009-2011 E90 335d and E70 X5d, which had the M57 engine. The M57 uses a twin-turbo sequential setup, while the N57 has a single non-sequential setup. That requires a different downpipe. Also, for the EU/UK guys, all USA/CA cars had a different EGR, DPF (DOC) and all have SCR/DEF. And those cars all have electronic/electrical controls rather than the vacuum system operating the EGR and other stuff.

The newer DDE tested on the E90/E70 USA cars has to be bench-flashed (cannot be flashed in the car) to remove all the OBD/CES checks to pass emissions (no-one does sniff tests on diesels, so "all" you need to do is to get a tune.) (If you search you'll find 2-3 names of people doing them.) You cannot code out those checks; a tune is required.

However, dieselgate has sharpened the EPA's interest in enforcing things, and there are no shops advertising their services in this regard, as none of them want the $25K-$50K fine. One in particular stopped doing tunes while they got some procedures in place: you MUST sign a waiver saying it's for off-road use.

One final thing: there were only around 10K E90 335d imported to the USA/CA. There are more X5d's, not sure how many. The F10 535d and F15 X5d probably have sold less numbers. So it's a small market and not really worth it for shops to risk big fines and to design and manufacture the dp's and do the tune.
The N57 uses the Bosch EDC17 which is the same as the US 335d. The EGR etc is also electronically controlled, the similarities with the US 335d are greater than they are to the EU 335d.
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      10-27-2017, 05:59 AM   #27
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Quote:
Originally Posted by Len_Beach View Post
The N57 never featured in a 335d. They were all variations of the twin turbo M57.
Hopefully my correction is to your liking.
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      11-17-2017, 08:01 AM   #28
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Quote:
Originally Posted by robbiep View Post
80k miles, EGR needing replacement ... sounds about right, tbh. They don't last forever.

As I posted a considerable time ago on this (and other) threads, various people have been saying 'It must be possible', or 'A fix is about to be released by XYZ company, watch this space !', and then it all goes quiet again.

Here in the UK, where diesels have been a lot more popular for a long time, nobody has managed to delete the EGR and/or DPF as yet, and that's with 5 years of work going into it.
Quite simply, the systems are hard-coded into the car electronics. As the EGR (for example) opens and closes, the car expects to see other readings, taken from other sensors, change (for example inlet air temp). If those readings don't change as expected, then the car throws a fault code.
Out of curiosity, is it an expensive replacement? Mine is definitely on the edge. I've got almost 100k miles on my 320d so I'm expecting troubles soon. Presume it's just a plug and play replacement?
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      11-17-2017, 08:49 AM   #29
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Quote:
Originally Posted by robbiep View Post
80k miles, EGR needing replacement ... sounds about right, tbh. They don't last forever.

As I posted a considerable time ago on this (and other) threads, various people have been saying 'It must be possible', or 'A fix is about to be released by XYZ company, watch this space !', and then it all goes quiet again.

Here in the UK, where diesels have been a lot more popular for a long time, nobody has managed to delete the EGR and/or DPF as yet, and that's with 5 years of work going into it.
Quite simply, the systems are hard-coded into the car electronics. As the EGR (for example) opens and closes, the car expects to see other readings, taken from other sensors, change (for example inlet air temp). If those readings don't change as expected, then the car throws a fault code.
While I don't disagree that it is difficult to do; the system in these cars is hardly any more advanced than the Bosch system in modern Volkswagen diesels...

I think the issue is actually more one of demand rather than technology...
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      11-17-2017, 11:29 AM   #30
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Quote:
Originally Posted by beanbaguk View Post
Out of curiosity, is it an expensive replacement? Mine is definitely on the edge. I've got almost 100k miles on my 320d so I'm expecting troubles soon. Presume it's just a plug and play replacement?
BMW dealers don't even charge that much to do it - I think it's about 300 supply and fit. It's probably not for the average DIY-er, but should be within the grasp of the very competent.

Not sure if it'd need the ECU resetting or not.
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      11-20-2017, 05:25 AM   #31
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Quote:
Originally Posted by robbiep View Post
BMW dealers don't even charge that much to do it - I think it's about 300 supply and fit. It's probably not for the average DIY-er, but should be within the grasp of the very competent.

Not sure if it'd need the ECU resetting or not.
Out of curiosity, I came across this video...could be an interesting and quick fix to do at home?

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      11-20-2017, 06:34 AM   #32
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Quote:
Originally Posted by beanbaguk View Post
Out of curiosity, I came across this video...could be an interesting and quick fix to do at home?

I think that'd be a very temporary fix. He's only cleaning off one side of the workings of the valve.

However, it does indicate that replacement (probably) doesn't need hooking up to diagnostics to reset any fault lights, and they go away automatically on startup once it's been replaced or fixed.
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