Other Fuel System Tank Assembly problems of the 2012 BMW X5

Frequent issues with def active/passive tanks and sensors and the dealer runs about $2500 upward charges for each of these repairs. The complete X5 diesel is full off issues compared to their 35i.

Diesel engine, scr passive tank/sensor needs replace. BMW dealer said its not covered in the warranty (extended warranty of 10y/120k miles, but scr active tank/sensor is covered. What? my mileage 94k miles). Passive tank still part of the emissions systems. Cost is $3k repair. I don't understand (BMW) put the sensor built into the tank. I'm sure a lot of BMW owners will run into this issue costing lots of dollars and profit for BMW. Need to get BMW to cover this cost.

The diesel exhaust fluid passive tank in my BMW X5 has failed, which from what I've read in many forums is an unacceptably common occurrence. While taking the car into the dealership to have three other recalls addressed I asked about the tank being covered in the extended emmissions warranty on the car. They informed me that the main diesel exhaust fluid tank is covered (which they replaced because it had failed too), but the reserve or passive tank was not covered under the warranty. Now there is a countdown on the dash that if I drive over 900 miles without fixing it the car will know longer start. I have had my diesel exhaust fluid filled multiple times but the message returns immediately. To replace the defective tank is $2,500. I'm making a complaint because as I said this is a widespread issue with this part and if BMW realizes there is a defect on the main tank, why wouldn't they also replace the passive tank under extended warranty?.

Check engine light came on and BMW service center told me the sensors in the passive diesel exhaust fluid tank failed and entire tank needs to be replaced. BMW extended the warranty on the active tank, but not passive. Think its ridiculous that only one tank is covered while the passive is not. This is a well-documented issue on BMW's diesel.

An engine light comes on when hard breaking. Some time the lights go off after next refueling. When check in, the computer indicate some problem with sensor related to fuel tank.