How do I change the transmission oil in my Ford Focus 1.6 Zetec SE 16 value engine ?

The catalytic converter is the first bulbous box past the exhaust manifold.

2003 Ford Focus: The catalytic converter needs to be ...

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Jun 1, 2009 - I have seen a catalytic converter only (no pipes), a catalytic converter with a pipe that bolts onto the manifold? and other variations. Which ...

1 answer · Top answer: Hi, Ok, you have one converter, which bolts to the end of the exhaust [/topics-exhaust-ford/] ...
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It looks like this

https://www.carparts.com/catalytic-converter/ford/focus/2003

Check the video below

Harold, According to the 2002 Ford Focus Owner manual,
With engine oil filter change : 2.0 liter SPI engine takes ( 3.78 liters / 4.0 U.S. quarts of 5W-20 )
2.0 liter Zetec engine takes ( 4.25 liters / 4.5 U.S. quarts of 5W-20 )
links below talk more about what they think oil should be used.
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Oil recommendation for 2002 Ford Focus Passenger Car Motor Oil PCMO...

Ford Focus 1998 2004 99 1 8 Confusion over acceptable oil grade to use...

What kind of oil do you use in your Focus

2002 Ford Focus Specs

images for 2002 Ford focus se 2.0 zetec motor

Depends on what engine you have.
2.0 HP Zetec SVT Focus 5W-30 motor oil all others 5W-20 motor oil.

If your original engine didn't have a knock sensor, but the new one does, don't worry about it. You can safely remove it or just ignore it.

was the oil clean of residue ?
you might have a faulty valve that makes the shifts rough

hi i have a 2001 1.6 zetec ford focus. the engine managment light is on and my car has bee leaking oil into the airbox on the floor and onto the gearbox coming from the rocker cover breather hose ( i have changed the camshaft breather hose and valve ) any suggestions ?

2003 FORD FOCUS 2.0L 4-cyl Engine Code [3]
Engine Oil Grade 1......API* All TEMPS......SAE 5W-20, Engine, with new oil filter 4.3 liters.
Thank you for using fixya and good luck Oil Drain Plug.....17ft/lbs Torque

Most likley just the valve cover gasket.