Just letting you guys know that we got another 10 kits made and ready to be shipped out. Inquire via PMs or email: [email protected]

Has anyone has any issues with the exhaust smell inside the cabin after deleting the DPF? I bought this kit from Alex and just got my X5 back from the shop yesterday. It runs great but when I stop at a traffic light the exhaust smell inside the car is pretty strong.

Maybe the EGR cooler got damaged somehow? I heard thats what causes the smell. Are your upper turbo to exhaust bolts tight? Apparently they can back out and even fall off, leaving you with a leak.

Its all good. I spent the day yesterday driving around and trying different things. Its only an issue when I am stopped and the engine is running. There is no smell at all while driving, and as long as I set the vent controls to recycle the air and not let in any fresh air from outside the smell is completely gone.

There is an exhaust gas leak somewhere in the engine compartment. The gas collects and gets into the HVAC inlet when the car is stopped, but it gets blown away when the car is driving.

Yes, there's an exhaust leak out of the tailpipes! When you stop, the exhaust will drift towards the front unless you're parked into a headwind and of course the smell will come through the windows or to the base of the windshield where it can be drawn in with the HVAC fan. I have over 30,000 miles on this mod and have never had an issue with an exhaust leak from anywhere but the tailpipes.

So you have sharp diesel exhaust smell in the cabin immediately after you stop the car and the engine is running and the heater/AC is on?

I have never smelled diesel exhaust even when standing at the tailpipes. There is an exhaust leak.

The smell is the strongest when I first start the car. Even with the AC off when I first start the engine the exhaust smell hits the cabin in about 3 seconds and then fades. While driving its fine, but if I come to a stop in heavy traffic and the AC is set to pull fresh air in from outside I can smell it.

could be vacuum hose line damage
 

Check out this thread. Similar symptoms. Could be vacuum hose line damage.