I had a rather large puddle of washer fluid on my garage floor the other day, so I took the inner wheel well cover off to look at the tank. It looked intact, I checked connections hoses and pumps. I poured some fluid in, did not notice as much as a drop so I filled it up a bit more. No visible leaks. I put everything back together, took the car for a drive before going to bed for the night. In the morning I was greeted by yet another puddle. I did not use the washer fluid on my drive. What gives? A really, really slow leak somewhere?

 

you might have a small crack or the line that feeds the wipers might be loose...if its under warranty take it in

 

No warranty... I'm going to take the tank out completely later on today to look for a crack. But man, I did not even see a drop... just wierd

 

Check where the pump mounts into the reservoir. If it's anything like my BMW 325i, the pump dredge slides into a strainer cup. Make sure the pump is fully seated into the strainer cup. It's possible that the strainer needs to be replaced also, as it serves as a gasket. The pump could be bad, or you could have a hairline crack in the reservoir. Let the reservoir leak, until it stops leaking. Then that will be telling where the leak is coming from. Good luck!