I got a BIG PROBLEM with starting in winter. I own MAZDA 3 (year 2004), I loves it to bits. But when temperatures drop below 0 (basically in winter only) my car does not want start.
Everyone was telling me it must be battery. But I was not sure, because it even wont try turn engine. But I got new battery and it did not solve the problem. My friends checked electric parts and it looks fine.
Then in MAZDA service told me to check IMMOBILIZER CONTROL if it is always on, or if it turns off when I get key in first position. Found out in cold weather it is always on and won’t let me start. So it is immobilizer problem we believe (confused I am).
But when I cannot start I turn on ventilation in car for few minutes to heat up car and my immobilizer let me start after that. It is very strange. Or once I start in the morning, then my car starts ok until next morning day when it cools down everything in the car.
In MAZDA service they checked connectivity on ignition etc. and they sprayed connectors for good connectivity. But if it wont solve my problem until tomorrow morning what do you advice?

Did anybody have same problem [&o]? I hate winter. I am worried go anywhere that I wont start car