Could someone please tell me where the MAP sensor is (perhaps with a photo if possible)...?

Good Morning, maybe somebody can help. My Santa Fee has now 180.000 km, was allways ok, but now the gear box had to be changed. It's been done by the Hyundai service and was extremly expensive. Also a service is been done with change of all heater plug, cleaner and of course oil.
Since then the engine check light was on. The engine had no power and showed on load black smoke.
OBD II Diagnostic said Air Flow High Input. We changed the MAF sensor, after some kilomerter again the engine check light was again on and the car went only 40 km/h. Air flow Low Input. We changed the EGR Valve and again engine check light was on. ODB shows now both mistakes.
Now we want to change also the MAP sensor but we can't find the sensor..
maybe somebody can help. It's meanwhile awfull... thx al lot, Dartmoor