While driving the car stalls even at normal engine temperature.
Car Problem Diagnosis
When the car stall while you are driving even at normal engine temperature is an indication of having a fuel problem. Fuel injected car is equipped with a fuel pressure regulator that maintains fuel pressure on each of every fuel injectors, when the fuel pressure regulator is faulty the engine will not get enough fuel and this will cause the engine to stall.
Possible Cause of Fuel Injection Engine Stalling at Normal Temperature
Faulty fuel pressure regulator
All About Auto Recommendation
Bring your car to a reputable auto repair shop and ask the mechanic to check and confirm if the fuel pressure regulator is faulty. If the mechanic confirms that it is the cause of the problem then just replace the fuel pressure regulator to fix the car engine problem. When a mechanic told you to replace other parts that is related to fuel pressure regulator, do not agreed on what the mechanic told you observed first your car after replacement of the parts and if there is something unusual on your car then that is the time to agreed on replacing the related parts.
However, in most cases just by replacing the faulty fuel pressure regulator can fix the problem of car stalling while driving at normal engine temperature.