I called before purchasing this part since there were others that also seemed like they would work. (A mouse had chewed some wires in my mower over the winter.) I also bought a smaller version of the eletric assembly which was similar to a different part in the mower, but not exact. Luckily I didn't need to replace that part.
Replacing this part meant taking apart the entire machine, which was complicated but doable. The machine works great now. However, the part is expensive, and if I had to pay someone to replace it, I would have opted to buy a new mower, since they have come way down in price. (My mower is about 10 years old and more expensive than they are now.)