Actually yes. I'm torn with this. I have a bad scr and they are on backorder. I want my vehicle to be more reliable and not have to pay so much to get this emissions components fixed throughout the life of the vehicle. I also care about air quality, water quality and climate change. I know there are worse offenders, that doesn't make contributing more acceptable.

That said, if the reduction in nox is minimal, I could live with it. The performance isn't as much a factor as reliability for me. I wish there were after market parts for this system.

Don't our cars have auto recirc function? I've only heard that the diesel stink is unbearable on a cold start in summer with the windows open, but I think leaving recirc in the auto function would help -

Also, get a diesel catalyst on the midpipe, don't just do a straight pipe, it will help the stink, but it won't eliminate it completely - but will be worlds better than a total straight pipe from turbo on back.

You'll have a bit more soot but most vehicles even with deletes and tunes don't push out much soot on common rails - soot is also NOT associated with NOX, as you actually produce less NOX with more soot (and vice versa), its all dependent on load, tune, etc -

My wifes is at 45k miles and the SCR cat took a dump and both NOX sensors and the urea tanks have both been replaced already. Thank God its under warranty and I know they aren't dieselgate cars but for fucks sake if BMW thinks I'm going to have all these parts replaced every 40k miles and start paying for it out of warranty they have another thing coming.

EPA standards are supposed to be 10y/120k miles on emissions components from what I remember from my Dieselgate days.

Are you saying they are federally exempt after that?

No. My issue is the lifespan and frequent failure of emissions components on BMW's common rail diesels. Which also deserves credit as they were the only manufacturer that I can think of (and I had about a year and a half during Dieselgate to read all about it) that hasn't been found to cheat on modern diesel emissions tests.

For example, o2 sensors, catalytic converters on gassers are rarely talked about failing and especially not during new car warranty period. They aren't maintenance items.

None of the emissions components (NOX sensors, urea tanks, DPF, SCR catalyst, etc) are supposed to be a regular interval maintenance item, they are supposed to be "lifetime emissions components" - but the way they fail often and multiple times as evidenced by many owners shows the opposite.

This is what led Volkswagen to cheat emissions on their CR diesels, because if they ran the software at full emissions all the time it would lead to early component failure, so obviously we are seeing that BMW did not cheat like VW did -

There are reports of some DPF failures on the Volkswagen boards early but for the most part the owners were told that the Gen 1 TDI's (the ones without urea) once fixed to EPA standards would carry certification for 10y/120k miles on the emissions warranty, and for the Gen 2 and Gen 3 cars that also had urea injection, it would be 12y / 150k miles -

I am getting into too much Dieselgate info here but our foray into the 35D here is a direct foray into it. All I will say is that bought back by VW at 35k miles literally all I did to the car was change the oil and put diesel in it and have the fuel filter service done once.

Yes VW cheated but its something to consider.

Vast differences with the emissions components when contrasted to our 35D's (and as Thecastle will report, on his 335D)

So I ended up ordereing the Buzzken downpipe and midpipe kit and will be shipping the ECU to bwareca this weekend.

Decided against butchering the scr and dpf because they are in working condition and I might be able to sell them.

Plan on doing a few things to settle some questions I still have after reading other accounts:

1. before and after 0 to 60 video on the same road and recreating same conditions as best as possible.
2. I took a screenshot of my trip computer showing average speed and average mpg right now. After the project and some driving I'm gonna take another screenshot whenever the trip computer hits the same avg speed and similar miles driven. It should give a fairly accurate estimate of what happens to the mpg under similar driving conditions.
3. before and after exhaust sound changes at idle and under acceleration at the tail pipe.
4. Weight total weight savings in parts before and after.

Any other ideas I'm open to suggestions before I pull the ecu. This is a very exiting project :driver:

Sounds great! Did you add the catalyst on the midpipe for $220? It should help the smell greatly.

Looking forward to results.

I'm also looking forward to reading about your experience. This is a future project for me as well!

Nope that was extra $$$/weight, It adds somewhat of a restriction, might get clogged possibly and I actually quite like the diesel smell of old low reving farm tractors.

Not sure if that is what is going to be like ? I hope so! :strut:

Sweet looking forward to hearing how it works out for you, take pics of the removal and install if you can

Update
 

Now at 70,000 miles with this mod and ZERO issues. 162,000 total miles now and also have never had a transmission issue as some on this post claimed I would have after changing the trans filter and fluid at 90,000 miles.

No DPF fluid to add, no chance of a DFP clog, no chance of any EGR malfunctions. Now averaging 32.6 MPG at 60 mph.