DIY
Buy new pump & gasket and belt
Remove plastic front engine cover
Loosen tensioner on waterpump belt & remove belt. (Push tensioner down to loosen slack on belt. Then belt just pops off)
Remove battery
Remove bolts holding waterpump to block (remember which ones are the short ones) A good socket extension helps here.
Pry waterump apart. The part you bought will be the outer piece. The inner piece is just a case part. Have bucket under this section as coolant will come out,not a lot but enough to make a mess
Remove any impeller pieces you can with your fingers
Reverse to put new impeller back on. Add a little coolant to overflow to make up lost amount and then go get the system flushed to remove any smaller pieces of impeller which may escaped your fingers
Very easy to DIY.