[bboy8282]

So after searching around i understand that the misfires are caused by either the ignition coils or spark plugs needing to be replaced. Is there a particular reason why the plugs and coils are failing so prematurely? Is there a recall that i am not aware of in regards to misfires? The Reason why i am asking is because my car is going into the dealer for a second time (1st time they changed the plugs, coils and turbos) within a month for what i expect to be either plugs or coils (sputtering, rpm fluctuating and then SES light coming on and off...seems to happen more often on cold start ups)

[Chicks-Love-Bimmers]

For me, I believe it's the aggressiveness of my tune, but it can vary from car to car

[bboy8282]

Thats what i was thinking in the beginning but many who have tunes havent had misfire problems and my car is stock and going in for a second time...but ur def right in regards to it varies from car to car

[BMW&me]

An improper fuel injector spray pattern can also cause misfire.

[Zeph]

According to my dealer, the recent recall (new fuel pump and injector check) provided a new part number for the fuel injectors. They only replaced ones that had a certain range of serial numbers, but the new injectors have been upgraded because of these misifiring problems. Mine recently developed some misfires and they replaced the remaining 4 injectors (they only did 2 at the recall) so now all 6 of mine are the "new" and improved part.

I am going to replace my spark plugs next week when the tool comes in (bought it today) because I believe they are due, especially with all of the fueling and now misfire issues they have been through over the past 3.5 years.

Zeph