Mazda CX-7 Diesel Problems

We contacted Mazda on your behalf and this is the response we received from their technical people: "It sounds like there is a bit of confusion as to what the light relates to as the vehicle is also equipped with a gauge to indicate Adblue Level. It sounds like the customer may be relating the light as a level indicator. The light can be an indication of a system malfunction of some type, this would need to be diagnosed which it sounds like may have occurred. Depending on the cause will dictate the parts required to be replaced. There are separate components and not all concerns require tank replacement. The comments suggesting there is a massive problem and the tank could go at any time are bit unfounded and sound like unfounded Internet chatter. Our recommendation would be to let the dealership perform the diagnosis and repair. If the repair is completed by a Mazda Dealer as a Retail Repair using Genuine parts the parts are covered by our Whole of Life Parts Warranty." It might not be an answer, but it does give you a guide to the cause, as the warning light might be an indicator of another problem.