I had to change my pump last year... I don't know if they change on models, but on my ph1 one pump does both front and back and is situated under the black plastic under the passenger windscreen wiper. Lift the plastic and it should be visible. When I bought a new pump it didn't come with the o-ring to make it water tight and when I pulled my broken one out, the o-ring that was already there fell into the bottle. Be careful or you have to take the bottle out to retrieve it! It's a simple job!