My 2000 BMW 740i gets stuck in first gear when the weather is hot

SOURCE: BMW 318i 1999 Model

you could have a faulty sensor or a loose connection to said sensor. your trans control module needs to be checked by a diagnostic scan tool at a shop there they can check the module and see if there is a fault in you drive train. i doubt it's an internal problem with the trans....please rate this....thanks

SOURCE: BMW 325ci - Car cuts off on very hot days - Error code P00128

Check the following :

BMW Code PO128
This means that the engine's PCM detected that the engine has not reached the required temperature level within a specified amount of time after starting the engine. The intent of the P0128 code is to indicate a faulty thermostat. Similar codes: P0125
In determining the engine did not reach a "normal" temperature, it takes into account the length of time the vehicle has been running, the intake air temperature (IAT) sensor reading, the engine coolant

temperature (ECT) sensor reading, and the speed of the vehicle.

You will likely not notice any drivability problems other than the MIL illumination.
A code P0128 may mean that one or more of the following has happened:

• Low engine coolant level
• Leaking or stuck open thermostat
• Faulty cooling fan (running too much)
• Faulty coolant temperature (ECT) sensor
• Faulty intake air temperature (IAT) sensor

• Verify proper cooling fan operation (check if it's running more than it should). Replace if necessary.
• Verify proper engine coolant temperature (ECT) sensor operation, replace if necessary.
• Verify proper intake air temperature (IAT) sensor operation, replace if necessary.
• If the above items check out good, replace the thermostat

SOURCE: BMW 325, hard to start in hot weather.

before you try to start her again in hot weather, open your fuel filler cap, listen for any pressure release, close the cap, and try to start, if this works,then its just heat expansion in the fuel tank, replace the filler cap if this is the case

SOURCE: no heat thru vents on my 740i bmw, fan works

there are two pipes going into the car under the hood right in the middle of the hoods back wall check if they hot if no then you will have to clean your radiator system and heater boiler

SOURCE: My 1986 BMW 325e five speed is stuck in gear. How

replace clutch master slave cylinder.