The people saying they've been getting DEF tanks replaced under warranty, are you guys talking about the 4yr/50k or the 7yr/70k emissions warranty?

I'm still under 7yr/70k but outside of the 4yr/50k.

Cool location.... what is the warranty in your ess?

Tank is covered under 4/50; extended 6/100 (cpo or bmw) and under the California 7/70. it is NOT covered under the federal warranty

Well, word just came in, my piece of crap aftermarket warranty is NOT covering the DEF repair. This thing was the biggest waste of money ever. I'm glad I only bought the two year and didn't spend an extra grand on the three-year.

So now I have to decide what to do. I'm not going to pay the dealer $1800 to fix it. In TX they do not do emissions checking on diesel vehicles, so I'm tempted to go the route of eliminating the system entirely and removing the DPF. However, I kind of hate how I'd be polluting a ton more due to that.

Or I spend $800 on the tank and try to install it myself.

Or I trade the car in (I've only had it a year, but I love it, and would rather not part with it) for an i3, since their lease deals are fantastic right now

why not buy a thermistor or resistor for $10 ?

I'll be going that route in the spring. Currently, when the CEL comes on I fill the tank and it turns off.

Why have I heard nothing of this before? Specs on resistor needed please?

If you're talking about a DEF tank level sensor, then this is the link to check out. Some refer to it as the PIXLFIX fix!

On the other hand, the DEF tanks can also have the temperature sensor go bad. Not sure there is an "official" fix yet, but this posting from the M57 turbo diesel forum looks really promising. Here is the link for a $4 NTC 10K thermistor. The work was done on a 335d rather than an e70 35d, but it should be very similar. The only thing I'm not sure of is whether the specs (10k ohms at 77 degrees F) match the original thermistor. Also not sure how the epoxy coating will hold up to urea.

Hope that helps.

Wow. Nice. Thanks so much

Thank you all for contributing to this post. We have a 2011 35d with 124,000 miles on it and have had several active tank issues and ended up paying to replace in the 85,000 range as our extended warranty did not cover. I am a long term (1988) BMW owner and we love the X but it has sure been the most troubled. Thank goodness for this forum and those that contribute technical advise!