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Discussion Starter #1
Hello I'm new to the forum. I have a high mileage 200,000 MI 2007 Volkswagen Passat that started leaking gas from underneath the rear seat fuel pump onto the ground. Although it was leaking gas is still drove. My mechanic put in a used fuel pump that was tested working from the parts place but when it was driven car shut off and would not have any type of driving power. He was not a Volkswagen specialist. I've been told the car to a Volkswagen specialist who said I need both pumps replaced which I'm kind of skeptical because the pumps are working fine I only had a leak in the rear fuel pump under the seat.

Is it possible the original Mechanic just put the used fuel pump in incorrectly. Do you think I just need to replace the one leaking fuel pump or both pumps would need to be replaced with new parts? Call just old and not sure if it's worth it at this point.

Any help is greatly appreciated
 

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Discussion Starter #6
I see no reason to suspect anything other than the work done by the mechanic and the pump he replaced.
Thats what I was thinking maybe the pump is not installed correctly or pump is bad or not a fit?
 

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It would be a B6, which I do not know anything about.
 

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You mentioned the car drives. I wonder if the pump is installed incorrectly then how does it work to make the car run.
 

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Discussion Starter #9
You mentioned the car drives. I wonder if the pump is installed incorrectly then how does it work to make the car run.
Car does not currently drive, it drove fine with the gas leak. took it to a shop and they showed me where fuel pump was leaking spraying gas, replaced with a used pump and it drove for 1.5 days and then cut off and won't drive
 

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the pump would not spray, it is inside the tank, those FSI's up 'til ???maybe 2008.5 had real problems with the HPFP wearing "thru" the cam follower/piston. with that mileage I would check and replace that (35 bucks), now back to the pump under the rear seat, the pump I believe has two o-ring connectors ,chances are good that they are '"tired" or damaged, the gasket that the pump fits down into the tank also gets tired I would replace it also......order a new locking ring (cheap) . I will admit the B5 platform is way easier to do than the B6 series. Lots of tutorials on web.
 

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Discussion Starter #11
in the 07 when you take off the back seat cushion there is a Fuel pump Ring Lock that locks - Gas was spraying from the top of the pump where the lock is (Ring Lock) and was rusted out. Where is the cam follower piston? Thanks for the update, I will order the gasket do you have a link to it online to make sure I have the part number. Appreciate your help!
 

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when replacing pump whether with new or from "parts car" new ring and gasket should be installed, and the connections have "o-ringed" connectors, o-rings go South age and exposure to gas.....your HPFP is located to the very top right of engine facing the engine bay after removing air cleaner. should be some references in forum's search engine. will look tonight
 
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