Originally Posted by Aether4E0A

You certainly can. However, you need to make sure you choose an equivalent or better capacitor than the one Tekin provided.

Your capacitor needs to be rated for 16v or higher, be 330uF, and have as low an ESR as possible. This third detail might not have been very apparent. It explains why manufacturers use a particular capacitor, and why they mount it as close to the ESC as possible. Basically, the lower the resistance (and ESR), the better.

Digikey.com has thousands of capacitors. What you are looking for is an aluminum polymer capacitor, with the above properties. Search for that kind of capacitor, with 16v rating, 330uf capacity, Through hole mounting. Then, look at your options, and choose the one with a low ESR. Be sure to look at the physical dimensions, to make sure it will fit in your vehicle. Cost goes down as you buy more, say 5, 10, 25, etc. Shipping will be around $8 or so.

Or, you can try a cap from another ESC, but with this there is uncertainty it will be better than the Tekin.

To prevent the leads from breaking in the future, apply plenty of rubbery glue to keep the cap from shaking. E6000 is a great glue that I have used.