Hi
If its the Engine Air filter its located under the Drivers side engine bay, close to the Wheel.
You would need to raise the car and remove the 12 to 15 torx bolts securing the undertray.
Then you should see the base of the filter housing, i think its secured with 3 bolts 10mm approx.
I only know because i replaced the standard filter with a K&N filter recently
hope this helps Emm
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