You will need to remove the undertray
Undo the fixings - use a 10mm socket
Don't forget to place a suitably sized receiving tray beneath
Using an 8mm SQUARE socket, carefully remove the sump plug and fully drain the oil. When the sump has emptied, wipe clean the sump plug area with a paper towel and refit a new sump plug and washer
Do not over tighten. Replace the undertray
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