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Fuel Filter Location

19169 Views 12 Replies 4 Participants Last post by  DUTCH VanAtlanta, 
DUTCH VanAtlanta
Can anyone point me in the direction of where the fuel filter is located? On my MB CDI it was located on top of the engine in the "V". I don't see it anywhere on my Q7 3.0 TDI.
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chittychittybangbang
The fuel filter for the Q7 TDI V6 3.0 part number is Audi # 7L6 127 434 c (7L6127434c). This is same part number for the 3.0L CATA V6 Touareg engine. The fuel filter housing is also the same for the Touareg and Q7.

The filter housing is shown below on the Q7 - it's on the very right side and has a silver cylinder on the firewall coming out of it and 4 hoses. It's on the firewall side of the red hose.
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DUTCH VanAtlanta
Thanks. I thought that might be it, but it's a whole lot more complicated than my MB ML CDI fuel filter. The CDI had one hose in and one hose out with a water separator tap in the middle.
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chittychittybangbang
I'm not sure if it's the same but here's a diagram of how the filter is routed on the 2.0L TDI engines. It should be similar on your engine because they both have 4 hoses. It looks like there's a water drain but I don't think anybody ever uses it or finds water.
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DUTCH VanAtlanta
chittychittybangbang said:
I'm not sure if it's the same but here's a diagram of how the filter is routed on the 2.0L TDI engines. It should be similar on your engine because they both have 4 hoses. It looks like there's a water drain but I don't think anybody ever uses it or finds water.
Click to expand...
Thanks. One of the service steps calls for draining the water from the fuel filter.
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Jacket
chittychittybangbang said:
The fuel filter for the Q7 TDI V6 3.0 part number is Audi # 7L6 127 434 c (7L6127434c). This is same part number for the 3.0L CATA V6 Touareg engine. The fuel filter housing is also the same for the Touareg and Q7.

The filter housing is shown below on the Q7 - it's on the very right side and has a silver cylinder on the firewall coming out of it and 4 hoses. It's on the firewall side of the red hose.
Click to expand...
What is that silver horizontal tube adjacent to the fuel filter canister?
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chittychittybangbang
I thought it was a fuel filter. There have been a few small changes and the biggest change was the 2013 engine. What does your engine look like?
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Jacket
Mine looks like the attached picture in your post #2. I'm coming up on a service interval for the fuel filter, so I've been trying to do a bit of research to do it myself. My assumption is that I'd pull the lid off of the canister at the far right edge of your picture (with the 4 hoses coming out of the top), and replace a filter element on the inside. But I'm finding other threads that make me wonder if the silver bullet is part of the service.

And when I try to check the online parts suppliers for a diagram, I find nothing. If you search for a fuel filter though, you get a $250 part.
http://genuineaudiparts.com/parts/2...ERVICE&subgroup=FILTERS&component=FUEL FILTER

which doesn't seem to jibe with others that mention a $50 filter with a couple of gaskets. So I've got myself confused. Hoping to get more data points from the VW crowd that seems a bit more likely to be DIY.
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Keithuk
They do 3 diesel engines for the Q7, 3.0, 4.2 and 6.0 which one is yours?

That site you posted is for the full canister complete which you don't need.

ETKA says 3.0/4.2 complete fuel filter and canister - 7L6 127 401 H - £262
Fuel filter element with gaskets - 7L6 127 434 C - £59

ETKA says 6.0 complete fuel filter and canister - 4L0 127 401 E - £394
Fuel filter element with gaskets - 4L0 127 434 - £63

Those prices are a bit steep when mine was Fuel filter element with gasket 1K0 127 434 B - £29.20

Me personally I would remove that 1976 Toyota Land Cruiser and add more details about your Q7 like engine code. Options Sticker and Engine Codes
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Jacket
In the US only the 3.0 V6 TDI is available.

Thanks for the parts info. Does your ETKA source indicate what part the horizontal silver tube is?
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Keithuk
No it doesn't show any horizontal silver tube as such.
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chittychittybangbang
Jacket said:
In the US only the 3.0 V6 TDI is available.

Thanks for the parts info. Does your ETKA source indicate what part the horizontal silver tube is?
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I thought it was a filter because the older ones showed some sort of filter there but I could be wrong. If you change the filter, can you make a DIY with a new wiki article?
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DUTCH VanAtlanta
chittychittybangbang said:
I thought it was a filter because the older ones showed some sort of filter there but I could be wrong. If you change the filter, can you make a DIY with a new wiki article?
Click to expand...
If his is a 2010 as was mine, this thread has a good link to exactly what needs to be done.

http://www.myturbodiesel.com/threads/fuel-filter-change-question-diy-audi-q7-3-0-tdi.16335/
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