Fix
Blender leaking from the bottom usually means a worn gasket, loose blade assembly, cracked jar or overfilling. Find the source and fix it.
A puddle under the blender almost never means the whole machine has failed. The liquid is getting past one seal, and a simple water test shows which one in a minute or so. Most bottom leaks trace back to a handful of small, fixable parts, but the motor base is the one place liquid must never reach, so the order of operations matters.
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Before taking anything apart, work out where the liquid actually escapes. Fill the jar with plain water, set it on a paper towel and run the blender for about 30 seconds, then see where the towel gets wet.
A wet spot directly under the jar points to the blade assembly or its gasket. Dampness around the motor base suggests a cracked jar or a worn coupling. Wetness near the lid points to the lid seal rather than the base, so check the lid gasket and that the lid locks in place.
Once the water test narrows things down, match the leak to one of these causes. The gasket is the most frequent culprit, so it is the first thing to check.
Work through the repair in this order, since each step rules out a cause before you spend money on a part.
No. Liquid that reaches the motor can create shock or fire hazards, so fix the leak before blending again. Stop using the machine for good if it gives off burning smells, grinds, or has several worn parts at once.
When the jar or seals are beyond saving, replacing the whole unit can make sense. For models with big pitchers and strong ice crushing, see the blender comparison for making frappes.
If only one part has failed, order a replacement matched to your exact brand and model number, because these parts are not interchangeable between machines.
Most leaks come from wear that builds up quietly, so a few routine habits do the most good. Heat matters too: it expands both liquid and plastic and puts extra pressure on the seals, so a gasket that holds cold ingredients can fail with hot ones.