That would be a missfire, and not at all related to the X-pipe. The only reason the check engine light ever flashes is when there is a missfire actively present.

Odds are you either have a coil going out, or need the plugs changed. BMW has always had some issues with coils which is why they use 2 different brands. If bosch coils act up too often, swap for bremi. And vise versa... which is why there were a few bulletins on them over the years.

thanks alot for your help man.i just changed my coils about 2 months ago. the car was jerking and it would just shut down. could it be the same issue again. thanks for your inputs.

I'm in jersey city..my bro is getting his xpipe done now on his 4.4 in Caldwell Meineke. He's being charged $100 flat for the install.. he'll post pics later when it's all done..:thumbup:

Hey guys.. Here's the video of my xpipe install... YouTube - BMW X5 4.4i X-pipe Installation Video and Soundclips.
The guys at Meineke, Caldwell did an awesome job.. They asked me if I wanted the xpipe centered where the stock was and I told them whatever is easier.. I didn't think it'd make any difference anyways.. They kept telling me the hardest part of the install was cutting the SS exhaust pipe.. They had to changed saw blades 6 times.! NOT bad for a hundred bucks, huh?

how long did it take them to put it in?

Almost an hour.. It would've been longer but two other guys came and help out so that made it a lot faster... While one guy is welding the pipes, the other guy was doing the support hooks. The third guy was making sure the rest of the exhaust was dead center especially at the tips..

haha so true, all that and no sound clip?

Ldiggs, I see you live in BK. I have a good muffler guy that will charge you less for a good job. He has a job by shea stadium. I dont know if you've heard of Willets Point muffler shops before. He has been doing most of my welding job since my first car (6 years now) which was a 98 Eclipse GSX 486HP. He has a good welder. If you want the info just shoot me a PM.

I sat through the whole video for no sound of finished product we know you got it done now lets here it:confused: