Audi a3 fsi has got an oil leak. I have changed the oil filter housing but car seems to still leak. Please assist

Question edited for clarity.
Question moved to model category.

Let's assume you mean engine oil. You also need to change the oil filter as well. You will need a jack, axle stands, an oil catch pan and a container to store the old oil until you can take it to your Community Recycling Centre, a set of wrenches and an oil filter wrench. As Larry states, it is much better to go to Jiffy Lube, with no fuss, no mess, in and out in 15 minutes.

There is a video here

https://www.google.com/search?q=2010+Audi+A3+change+engine+oil

Your Owners Manual is here

https://ownersmanuals2.com/get/audi-a3-s3-2010-owners-manual-71856

..

It's sounds like you have leak on oil cooler housing

First check the fluid level and make sure it is correct. If it's good you will then need to go to the dealership to have the codes pulled. I hope the problem is the fluid because it will be expensive otherwise.

side the engine i would assume ,why? do you have low oil pressure

You're going to need to visually inspect for leaks and if no external leaks are evident I suspect your head gaskets are leaking again - check oil for coolant in oil - it will look milky

because of the shape of the car and temperature within the under bonnet,audi/ vw use the electric fan to maintain a closer tolerance of engine temperature.for maximum economy.so your main fan will come on more often than perhaps an older car that you may have owned.as changing the thermostat has shown no change.

Yes according to the dealer they are the same heads..

There should be a square hole for a 3/8 ratchet or a octagon for a wrench to remove th adapter. Some had allen wrench fittings which would be a recessed octagon

NON-FSI PETROL ENGINES,THE SENSOR SWITCH IS SCREWED INTO THE OIL FILTER HOUSING,REMOVE THE ENGINE TOP COVER.UNBOLT THE COOLANT EXPANSION TANK MOVE TO ONE SIDE .THERE NO NEED TO DISCONNECT COOLANT HOSES.AND DISCONNECT WIRING PLUG FROM SENSOR.UNSCREW SENSOR.....FSI ENGINES REMOVE THE INTAKE MANIFOLD TO GET AT SENSOR....DIESEL ENGINES THE OIL PRESSURE SENSOR IS SCREWED INTO THE OIL FILTER HOUSING ASWELL.PRISE OUT THE CAPS,UNDO THE NUTS AND REMOVE THE PLASTIC COVER ON TOP OF ENGINE.REMOVE THE INSULATION BENEATH COVER (WHERE FITTED).DISCONNECT WIRING PLUG FROM SENSOR AND UNSCREW......BE PREPARED FOR OIL SPILLAGE.. HAVE A NICE DAY!!