Audi A7 3.0 TDI Questions
#1
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Audi A7 3.0 TDI Questions
I am currently looking at a 2014 A7 TDI with 47k miles on it. I searched the VIN on the Audi site and it came back as having the modification completed and remaining emissions warranty. As a long time diesel truck owner I am a big fan of diesels and this car will be used on the highway quite a bit so I feel it’s a good fit for me. Here are my questions:
-Did the emissions modification hurt the fuel economy and/or reliability of this engine?
-Are aftermarket modifications available to delete emissions restrictions, increase torque/hp, and/or increase fuel economy?
-What kind of real world fuel economy numbers are guys seeing on the highway with or without aftermarket modifications?
-How is the reliability of this engine?
-Any particular things to look for?
Thanks in advance!
-Did the emissions modification hurt the fuel economy and/or reliability of this engine?
-Are aftermarket modifications available to delete emissions restrictions, increase torque/hp, and/or increase fuel economy?
-What kind of real world fuel economy numbers are guys seeing on the highway with or without aftermarket modifications?
-How is the reliability of this engine?
-Any particular things to look for?
Thanks in advance!
#2
I am currently looking at a 2014 A7 TDI with 47k miles on it. I searched the VIN on the Audi site and it came back as having the modification completed and remaining emissions warranty. As a long time diesel truck owner I am a big fan of diesels and this car will be used on the highway quite a bit so I feel it’s a good fit for me. Here are my questions:
-Did the emissions modification hurt the fuel economy and/or reliability of this engine?
-Are aftermarket modifications available to delete emissions restrictions, increase torque/hp, and/or increase fuel economy?
-What kind of real world fuel economy numbers are guys seeing on the highway with or without aftermarket modifications?
-How is the reliability of this engine?
-Any particular things to look for?
Thanks in advance!
-Did the emissions modification hurt the fuel economy and/or reliability of this engine?
-Are aftermarket modifications available to delete emissions restrictions, increase torque/hp, and/or increase fuel economy?
-What kind of real world fuel economy numbers are guys seeing on the highway with or without aftermarket modifications?
-How is the reliability of this engine?
-Any particular things to look for?
Thanks in advance!
Dealer said expect 10-20% drop in mileage depending on how you drive (normal - maniac) along with minor drop in power ( but enough that you could notice it )....... although I have only been this way for a week, it seemed that the dealers description was accurate. The car still has plenty of power.
Well there are upgraded tunes available for these motors. Yes there are tunes that support (Removal of DPF, Adblue, EGR, and/or Intake Swirl Flap). Having said that I don't know what those are.... yet.
I did purchase and install (using their Flashzilla installer) a Malone Tune (stage 2) which supports the removal of those items and the tune provides for a huge power increase. With the removal of those things it takes the car from an after fix that is something less than the stock 240/406 to 305/490 with the deletes.
I have installed the tune without doing any of the deletes and the increase in performance is dramatic. From the little bit of TDI browsing I have done it seems that others have gained their mileage back by also doing something related to more free flowing cat/exhaust.... need to do more reading.
Just remember power only comes from fuel, you have to burn it to make it. Anyway, the power increase put this car waaaay beyond pre fix power. This is not a subtle change, you will notice it everytime you drive it.
Anyway I have more studying to do as this is my first diesel. I live in California where emissions test are stringent so I have to see how/if the deletes etc can live within the law. If not, I am fine because the power from this Malone Tune is fantastic, smooth and feels like OEM until you put your foot down.
Note: I will track my mileage and report back, I don't think it will be all that bad. Having said that I purchased the car pre - fix and prev owner never filed a claim. So I just got 9664.27 from VWOA! so I have been well compensated for any lost miles per gallon due to the fix. Yes I bought a used car and got almost 10K back after buying it.... When I bought it, I was completely unaware of any this, I only bought it because it gets better gas mileage than my 07 4.2 A8.
Last edited by 1stGOAT; 05-31-2018 at 09:06 PM.
#3
I took my 2016 A7 TDI in for the emissions 'fix' three months ago at 25,000 trouble free miles … now it has thrown the "check engine" light twice in 500 miles for the particulate sensor warning. I hope this isn't a pattern that is a 'feature' of the new emissions changes. Anyone else seeing this after the 'fix'.
#4
We had a 2011 TDI Q7 for 122000 miles. It was bought back in the emissions settlement. We purchased a 2015 TDI Q7 with the proceeds. It was already “fixed”. Fuel mileage is a bit less by 1-2 mpg and the throttle response is a bit less linear. The new fixed one requires the throttle to be pressed a bit further to get equal acceleration. The power is still there but the pedal must be pressed further and when the power comes on it is rather sudden. Not as smooth and driver friendly as our 2011 that we loved for 6 years and 122000 miles. We have put 8000 miles on the 2015 since the fix. No problems. No CEL. Coming up on its 10,000 mile service. I’ll run a scan then as I reset the service reminders and see if any codes are hiding.
So far I’m happy. How often can you swap to a 4 model year newer vehicle ,nearly identical and 80+thousand fewer miles and make a few $ on the swap?
So far I’m happy. How often can you swap to a 4 model year newer vehicle ,nearly identical and 80+thousand fewer miles and make a few $ on the swap?
#5
I may have a lemon
I took my 2016 A7 TDI in for the emissions 'fix' three months ago at 25,000 trouble free miles … now it has thrown the "check engine" light twice in 500 miles for the particulate sensor warning. I hope this isn't a pattern that is a 'feature' of the new emissions changes. Anyone else seeing this after the 'fix'.
#6
AudiWorld Super User
I purchased a new 2016 A8L tdi last April. I nine months I've had the CEL come on more times than I'd care to mention. Three times it has been the oxygen sensor and twice the nox sensor. Audi is claiming that it's caused by short distance driving. Anyone else having similar issues eith thier new tdi?
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#8
AudiWorld Junior Member
I purchased a new 2016 A8L tdi last April. I nine months I've had the CEL come on more times than I'd care to mention. Three times it has been the oxygen sensor and twice the nox sensor. Audi is claiming that it's caused by short distance driving. Anyone else having similar issues eith thier new tdi?
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