Oil change Citroen DS3 2010 - 2017 | Haynes Manuals
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To access the sump plug, you will have to remove the undertray
First, undo the 10mm retaining bolts. Caution - the undertray is heavy and must be fully supported during removal
Here's the sump plug
Don't forget to place a suitably sized receiving tray beneath
Using a 21mm 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 fit a new sump plug and washer
Do not over tighten - replace undertray