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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI (Diesel) Emissions

TDI (Diesel) Emissions This is a discussion about emissions from TDI's. Pro's cons of Diesels (including biodiesel) effects on the environment and how they compare to Gasoline and other fuel sources for Internal combustion engines.

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Old March 12th, 2019, 14:40   #1
jesus_man
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Default When did the Jetta start using DEF?

I am getting mixed information. I see in some places that a 2009+ started using DEF, but I am 99.9% sure my '10 does not use it. Lets just say I've owned it for a year and put 22k miles on it and have not filled it myself. And it has not been to a dealer during that time.

I am contemplating getting into a lower mile tdi, but I am not sure I want to deal with the hassles of a DEF system.

Thanks!
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Old March 12th, 2019, 15:00   #2
1854sailor
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2015 is the first year for DEF in Jettas and Golfs as far as I know.
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Old March 12th, 2019, 17:43   #3
MichaelB
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Quote:
Originally Posted by jesus_man View Post
I am contemplating getting into a lower mile tdi, but I am not sure I want to deal with the hassles of a DEF system.

Thanks!
DEF is really no hassel. Just fill with 2.5 gals every oil change and be on your way. It is probably a bigger hassel to change the oil on a 2015 than add DEF.
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Old March 12th, 2019, 19:35   #4
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I not concerned with the DEF specifically. I am more concerned with the system that requires it. I have two other vehicles that burn it and the older one has been a flawless car, save for some fairly major issues with the DEF system. So far those have been covered under warranty. But that won't last forever.
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Old March 12th, 2019, 21:33   #5
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Quote:
Originally Posted by jesus_man View Post
I not concerned with the DEF specifically. I am more concerned with the system that requires it. I have two other vehicles that burn it and the older one has been a flawless car, save for some fairly major issues with the DEF system. So far those have been covered under warranty. But that won't last forever.
What other cars that you own utilize DEF are you referring to? Your sig shows a 2005Jetta, 2002 Passat, and a 2009 Sportwagen.......none of those require or utilize DEF.

Last edited by MichaelB; March 12th, 2019 at 21:38.
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Old March 12th, 2019, 21:57   #6
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Two other vehicles, most likely trucks.
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Old March 12th, 2019, 22:26   #7
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Quote:
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Two other vehicles, most likely trucks.
"I have two other vehicles that burn it and the older one has been a flawless car,"
Please excuse my confusion.
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Old March 13th, 2019, 06:50   #8
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Indeed.
2012 BMW X5 3.5d
2017 F-350 - been flawless too, but it doesn't get driven much. 10k miles in 2+ years. Hence the love for a commuter TDI. I am in a position vehicularly (?) now that I have been striving for a long time. Wife's car, diesel. Commuter car, diesel. Truck, diesel! Now if I could afford to put an oil burner in my 1973 bronco... Anyone have an R2.8 they want to donate?
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Old March 13th, 2019, 07:29   #9
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BMW Adblue issues were often caused by incorrect dealer service. They tended to over-fill the tank, causing Adblue to get into the vents and crystallize. That blocked the vents and caused the tank to fail. Correct maintenance prevents that.
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Old March 13th, 2019, 09:40   #10
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I was a fan of SCR simply because it allowed a diesel to do what a diesel does best: run lean and use less fuel.

However, the system does add a layer of complexity that can cause a lot of headaches, many of which are pretty expensive. Pumps, heaters, sensors, injectors, lines, etc. Plus, when the system has an issue, in most cases you cannot even start or drive the car normally because it puts in some sort of failsafe mode.

So as long is it is working, it is mostly a non-issue. Some vehicles have some really dumb places for filling the tank, like the T'reg that requires the spare tire be pulled up. Even the sedans that have you fill it through the trunk are a pain to try and not make a mess.

But the ones that have it OUTSIDE where spills can be easily washed off with a hose, or under the hood, are not as bad to deal with for me.
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Old March 18th, 2019, 16:00   #11
AVM62
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The main Issue I have with DEF fluid, is if somebody spills it. DEF fluid makes quite a mess with it crystallizing. My car has the DEF fill in the trunk. Whoever thought to put it in there, should be fired. I havenít had any other issues with it. I have over 60,000 miles and almost four years of ownership and I personally have not had to add any DEF fluid. It gets added when I get a oil change every 10,000 miles.
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Old March 18th, 2019, 16:42   #12
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Quote:
Originally Posted by AVM62 View Post
The main Issue I have with DEF fluid, is if somebody spills it. DEF fluid makes quite a mess with it crystallizing. My car has the DEF fill in the trunk. Whoever thought to put it in there, should be fired. I havenít had any other issues with it. I have over 60,000 miles and almost four years of ownership and I personally have not had to add any DEF fluid. It gets added when I get a oil change every 10,000 miles.
I'd be interested to know what you are being charged by the dealer to add DEF.?
I'm sure it isn't free!
I buy DEF at truck stops for around $ 2.79 gal.
Take a black garbage bag, stuff part in the opening where the DEF fill is and the rest covers the trunk.
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Old March 19th, 2019, 11:46   #13
jesus_man
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It does make a mess! I have many times, had to wash off my wife's X5 after I spilled it when the system burped on me. BMW also has less than desirable locations for their filling points. The only time it was a real issue was when it was well below freezing out and I have to try and uncoil a frozen hose to get enough length over to the car to rinse it. Then drain the hose and attempt to roll it back up. not to mention the ice slick that is now covering my gently sloped driveway...

The truck fill is right where it should be...next to the fuel fill cap.
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