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Thread: 2014 328d DEF Fill

  1. #1
    Join Date
    Oct 2014
    Location
    Murphy, NC
    Posts
    3
    My Cars
    2014 328d, 2002 Z3M

    2014 328d DEF Fill

    I bought a 2014 328d about 1.5 yr ago and love it.
    I am still trying to figure out the DEF tank capacity.

    I was going on a 2500 mi vacation and had put about 8k miles on it and had not added DEF yet. (I figured the BMW dealer I bought it from topped it off before selling.)
    So I topped it off with Peak DEF, using the include spout. I could not find the capacity anywhere, but it overflowed after putting about 3 - 4 liters in.
    Well, about 5000 mi later, my 1000 mile DEF warning light came on.

    This time, since the light came on, I planned to measure how much the tank holds.
    Using a clean 2L jug, funnel and patience... I added 11.5L! It did not overflow, but the change in gurgling sound made me stop.

    So... I assume my first "fill" did not come close to filling the tank. I probably poured it in quicker than the car could handle.

    My plan for future fills is:
    1. Wait for the light to come on.
    2. Put a full 2.5 gal (9.5L) container of DEF in.

    Two questions for the forum:
    1. Does 11.5L sound about right for a fill after the warning?
    2. Suggestions for improvement on my planned process.

    Thanks,
    John

  2. #2
    Join Date
    Oct 2009
    Location
    Bellevue, WA
    Posts
    2,403
    My Cars
    335d, 328xd (had 330xi)
    The active tank is 8.7Liters. The Passive tank is 9.4Liters.

    Page 13: http://www.bimmerfest.com/forums/sho...5&postcount=28

  3. #3
    Join Date
    Oct 2014
    Location
    Murphy, NC
    Posts
    3
    My Cars
    2014 328d, 2002 Z3M
    Thank you for that information. Very Helpful!

  4. #4
    Join Date
    Feb 2019
    Location
    CT
    Posts
    1
    My Cars
    2014 328d

    First time refilling DEF

    John

    I am a newbie to this. My light just came on so I want to fill the fluid. Can you tell me:

    -does the brand of DEF matter?
    -how much DEF should I add?
    -does the fluid come with appropriate funnels?
    -how do I know whether it is actually full, as opposed to not able to take in in quickly enough?

    Other tips?

    Thanks.
    Paul




    Quote Originally Posted by Jola will View Post
    I bought a 2014 328d about 1.5 yr ago and love it.
    I am still trying to figure out the DEF tank capacity.

    I was going on a 2500 mi vacation and had put about 8k miles on it and had not added DEF yet. (I figured the BMW dealer I bought it from topped it off before selling.)
    So I topped it off with Peak DEF, using the include spout. I could not find the capacity anywhere, but it overflowed after putting about 3 - 4 liters in.
    Well, about 5000 mi later, my 1000 mile DEF warning light came on.

    This time, since the light came on, I planned to measure how much the tank holds.
    Using a clean 2L jug, funnel and patience... I added 11.5L! It did not overflow, but the change in gurgling sound made me stop.

    So... I assume my first "fill" did not come close to filling the tank. I probably poured it in quicker than the car could handle.

    My plan for future fills is:
    1. Wait for the light to come on.
    2. Put a full 2.5 gal (9.5L) container of DEF in.

    Two questions for the forum:
    1. Does 11.5L sound about right for a fill after the warning?
    2. Suggestions for improvement on my planned process.

    Thanks,
    John

  5. #5
    Join Date
    Oct 2014
    Location
    Murphy, NC
    Posts
    3
    My Cars
    2014 328d, 2002 Z3M
    Hi Paul

    From my internet research, all ISO approved DEF is the same.
    I feel better buying from a sealed container like PEAK Blue DEF in the 2.5 gallon size, which is just under 10L. It comes with a filler spout. Truck stops sell it in bulk.
    BMW sells DEF in a container that prevents overflow. Maybe 2 L.
    Floydf has capacity for the two tanks listed.
    I was able to get 11.5 L in when the light came on. I poured it in through a funnel in 2 L steps. Maybe that is why I was more successful the second time. I stopped when the gurgling got loud.
    Others bought one BMW container, and used it as a self-stopping filler funnel.
    I washed any overflow off the paint and fill area.

    I hope this helps.

    John

  6. #6
    Join Date
    Sep 2006
    Location
    Michigan
    Posts
    13,674
    My Cars
    2005 325Xi
    BMW offers a 2.5 gal jug and a .5 gal top-off bottle.

    I think that the passive tank is something like 4.5 gallons (way more than Floyd stated. 9.4L is only 2.5 gal-ish). I think the active tank is right around 2 gallons, though.
    Last edited by Critter7r; 02-06-2019 at 03:51 PM.
    Quote Originally Posted by B4SH View Post
    If anyone knows, it's this guy who knows literally nothing about everything.
    Quote Originally Posted by fcvapor05 View Post
    Do you even OT? The mean 401k around here is probably about $6, what with all the shiny cars and $1,000 watches and donations to get other members' Volvos running.


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