DIY Oil Change for 3.6L Q7 With Pictures
The fact that Audi/VW had to put the filter on the bottom of their VR-6 was a nice treat, *not*!Couple things I noticed, my drain plug is 19mm (I've got a 2009 Q7 with the 3.6L VR-6), Maybe it's a Canadian thing?

Also the centre plug in the oil filter canister looks to be a 6mm allen or hex bolt, though I could be mistaken.
A nice little story, I bought my Q7 used from the dealer (a "Certified Preowned") anyway, I have owned it for about a month and didn't bother to check the oil when I drove it off the dealer lot, surely if they are going to detail the truck, replace a scuffed back fender, new tires, brake pads, roters, calipers, give me a new iPod cable and so on, they'll do something as obvious as _change the freakin oil_, nope, it is jet black. I guess the previous owner didn't bother to change it for the last 8000km (5000 miles), who can blame them? And the dealer forgot to change the oil too. I guess my next project will have to be a coolant and brake fluid flush.
Oh I also find I cannot stick a socket wrench around the drain plug, I have to use a combination wrench, trouble is the axel is in the way of a socket wrench.
Warning a short rant is coming: That VR-6, now that I've changed the oil, feels like a hack. Frankly it makes me miss my old 1.8T A4, I could do the oil on that in a third the time.
The fact that Audi/VW had to put the filter on the bottom of their VR-6 was a nice treat, *not*!Couple things I noticed, my drain plug is 19mm (I've got a 2009 Q7 with the 3.6L VR-6), Maybe it's a Canadian thing?

Also the centre plug in the oil filter canister looks to be a 6mm allen or hex bolt, though I could be mistaken.
Also the front belly pan doesn't need to come off, just the middle belly pan needs to come out, that should only be about 6 to 8 screws which you can use a 10mm socket.
For the oil pan drain plug, you can use a short 19mm with a short extenstion to pass the axle, if you don't have a 19mm wrench.
Once I get off the oil filter housing I just turn it around and pull it off while it's up in that small crevice, it's way to much of a PITA to try and take it out and you have lots of room to just turn it around and pull the filter and put the new one on.
Did the change on our 3.6 about a month+ ago with 5W40 Euro Shell/Pennzoil "Ferrari" oil and a Hengst filter. Cost me about $60 plus a couple hours of my time- mostly because that filter location is really tough to work around. My dealer records show the oil having been changed at least 3 times previously and I don't know how they kept the filter area and subframe so clean because you simply can't drop the filter housing without a lot of twisting and contorting, unless of course they removed a hydraulic line and possibly the subframe, which seems unlikely.
Did the change on our 3.6 about a month+ ago with 5W40 Euro Shell/Pennzoil "Ferrari" oil and a Hengst filter. Cost me about $60 plus a couple hours of my time- mostly because that filter location is really tough to work around. My dealer records show the oil having been changed at least 3 times previously and I don't know how they kept the filter area and subframe so clean because you simply can't drop the filter housing without a lot of twisting and contorting, unless of course they removed a hydraulic line and possibly the subframe, which seems unlikely.
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