I have a 2009 A4 Cabrio which I'm told is more like the B7 than B8... Anyhow, the windshield washer pump appears to be dead but the headlight washer pump works just fine. Looking at ECS Tuning it looks like the pumps are very similar but does anyone know if they're interchangeable? I don't get noise from the windshield pump so I'm guessing it's a bad pump but want to swap pumps to make sure it's just the pump and not the wiring or blocked lines.

Also, I watched a video of the pump replacement on a VW SUV and it's right behind the fender liner. Is it in the same place on my A4?

Thanks.