I have a real problem with the fact that the DEF being low or having a erroneous warning can cause the car not to start. I assume this is the case due to the warning?

I realize there are a number of other situations that could cause a no start situation like running out of fuel, running your battery down or any of a number of other failures, but come on, DEF being low is going to leave you stranded. Just one more reliability problem.

I would love to read the EPA requirements that dictates that the vehicle needs to be disabled until the DEF tank is filled. If this is stated, the government again looking out of the consumers best interest, NOT!

With the high failure rate of the sensors in these tanks and the high tank cost due to the sensors not to being serviceable, I can see many people looking for a work around that in the end will probably cause these vehicles to put out excessive emissions. Not going to be a pretty long term situation for BMW or other manufacturers that have these high failure rates.

I mean one of the members is in need of the 3rd replacement tank?? Not very encouraging.

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2008 4.8i Black with Tabacco. Black Y-spoke wheels and shadowline trim.