The sump plug is located on the base of the engine. It is accessed underneath the car
Don't forget to have a suitably sized receiving tray in place
With an oil catchment tray in position, useg an 8mm Allen key (or socket) to 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 the sump plug and washer
Replace (new) sump plug and washer. Do not over tighten
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