It is fairly easy to change and is located under the car about midway between the engine and the tank. You need special tools but are cheap at the parts store.
Depending on what part of the year your car was manufactured it can also be attached to the firewall just to the driver/rear of the engine. no special tools are needed, just pull (or break) the clips holding it in and remove it. replace the old clips with the new ones in the box. removing the air filter housing and hose to throttlebody will also aid in getting it out. Have patience when removing it, it can be a pain.
The MAF is located upstream from the intake filter on the intake housing.
According to the 2002 Ford Escort Owner Guide : ( Motorcraft FL-2005 ) engine oil filter for the 2.0 liter DOHC - Zetec engine
If it is not located somewhere between the fuel tank and the engine, then it is in the fuel tank. Follow the fuel lines to find it.
It has no cabin air filter.
where is the thermostat locted on my ford escot 2002
The ENGINE air filter is located in the engine compartment , near the front , on the drivers side . It is a cone shaped filter inside the round plastic housing
I don't know about the 1999, but on my 2002 it is located just below the air-intake filter casing. -Nick C
Back by the tank.
It doesn't have one.
Remove the tranny pan
On a 2002 Ford Escort ZX2 : The Mass Air Flow sensor is between the engine air filter and the engine air intake tube . It is INSIDE a round shaped plastic housing ( you will see where the wires go in )
According to the 2002 Ford Escort Owner Guide : The 2.0 liter , Dual Over Head Cam Zetec four cylinder engine takes : The ( Motorcraft FL-2005 engine oil filter )