If you have a leaking FRONT LOADER, the following link explains how to access and inspect your washer for leaks:
http://www.fixya.com/support/r3576656-washer_leak__front_loaderIn the majority of the cases with front loaders, the door bellow begins to leak. A routine inspection of the seal perimeter will tell you if there are any rips or tears. If the bellow is damaged, it must be replaced. The following link explains how:
http://www.fixya.com/support/r3574186-installing_a_door_bellow_on_a_front_loadReplacement parts (if required) can be purchased at any of the following websites:
searspartsdirect.com
pcappliancerepair.com
appliancepartspros.com
repairclinic.com
All these sites are reputable and offer great service with competitive pricing, so shop and compare. The first three sites I listed also include helpful exploded view parts diagrams to assist you in locating and properly identifying the parts you need.
Follow the tips in the links provided and make sure you inspect all the drain hoses, drain pump cover and tub seals as well.
If you have any questions, please post back and let me know. I hope you find this information helpful.