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How to Replace Battery Vent Tube 01-06 BMW 325Xi

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How to Replace Battery Vent Tube 01-06 BMW 325Xi

Created on: 2019-09-12

Watch this video to learn how to replace the battery vent tube in your 01-06 BMW 3 series vehicle.

  1. step 1 :Removing the Battery Vent Tube
    • Loosen the 10 mm nut to disconnect the negative battery cable
    • Repeat for the positive battery cable
    • Loosen the tie down Phillips screw to take tension off the battery
    • Remove the two 13 mm battery tie down bolts to remove it
    • Remove the battery
    • Pull the vent tube out of the rubber grommet
    • Remove the rubber grommet
  2. step 2 :Installing the Battery Vent Tube
    • Measure the new hose against the old hose to determine the length
    • If the old hose is missing, you need 2 inches of hose passed through the grommet, and 10 inches of hose to reach the battery outlet
    • Cut the hose to lenght
    • Insert the fitting into one end
    • Install the new grommet in the opening
    • Insert the hose through the grommet
    • Install the battery
    • Connect the vent tube to the battery
    • Position the battery tie down
    • Install the 13 mm bolts to secure the tie down
    • Tighten the Phillips screw to secure the battery
    • Connect the positive battery cable, and tighten the 10 mm nut
    • Repeat with the negative battery cable

Tools needed for replacement

  • General Tools


  • Materials, Fluids, and Supplies

    Marker / Writing Utensil

  • Ratchets & Related

    Socket Extensions


  • Sockets - Metric

    13mm Socket

    10mm Socket

Installation Video
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What's up guys? I'm Andy from 1A Auto. In this video I'm going to show you how to replace the battery vent hose on this 2001 BMW 325xi. If you need this part or other parts for your vehicle, click the link in the description and head over to

With the trunk open, over on the right side or the passenger side, there should be a cover that goes right here, this vehicle doesn't have one, but you're going to want to remove that cover. The battery is located right here. First thing I'm going to do is take a 10 millimeter socket and ratchet, loosen up this nut for the negative terminal. When that's loose, slide off the cable, slide it out of the way. With that off, now I can loosen up the positive side. With the same 10 millimeter socket and ratchet, loosen this up, take off the positive cable.

Now the hold down has a little bit of tension on it so you can take a Phillips head screwdriver, loosen up this screw right here. It's just going to release some of the tension. You don't have to take it out or anything, just loosen it up a little bit. Then we can take these two bolts out. Use a 13 millimeter socket extension in a ratchet, take this bolt out and then take the other one out. Take that bolt out. Take this hold down off. Just grab it, put it to the side.

There should be a vent hose that comes off the battery. Disconnect it. I'm just going to grab the handles, slide the battery up. Now I'm just going to remove the old hose, just slide it out, just like that. And there's a grommet right here. You can just grab the grommet and just slide it out, or you could take a pick or a screwdriver, just get in behind there and pull it out. Normally you can get it out with your fingers. Here's the old part. Here's the new battery vent hose from That comes with the same fittings for the battery, the same grommet, and then if you have a different style grommet, it comes with that. It comes with the hose. The hose is going to be a lot longer, which is okay, you can just trim it down, just use some scissors. Cut this off and there's plenty of hose. Get yours at and you'll be ready to rock and roll.

So you want to take the old hose and we're going to hold it up to the new hose. What I'm going to do is just take a marker and just mark right there. That's where I want the hose to go to the outside air. Now if you don't have the hose to compare to, this section right here is 2". So measure 2", make your mark, and then the rest of the hose on this particular vehicle happens to 10.5", so you can check and measure that. Or if you don't feel confident with that being 10", you can always cut the hose once the battery's in there. But since I have the old hose, I'm just going to compare, and just cut the hose now because it'd be a little easier, to about there. Just take some scissors, cut the hose, comes with the new fitting.

So we'll take the fitting, slide the fitting in there. You can just twist it, makes it a little easier. Here we go. There's the hose that's going to go in there. Take the new grommet. Sometimes these are a little bit tricky to get in, so slide that into position, like that. And that actually worked out pretty good, but you could always use a screwdriver to push it in a little bit. Take the hose up to your line, mark it, just like that. And you should have a length to get to your battery. Take the battery, slide it in position, and there should be a spot for the vent. There it is, right there. And if there's a plug in there, you want to pull that plug out. And there should be a plug on this side, so this side has a plug, that side's for the vent. And there's little spacer right here, so make sure the battery is right up to that spacer and you can put the hold down on next, line that up in position, just like that. Take the bolts, get the bolts started and take my 13 millimeter socket and ratchet and just snug these down.

All right, that's good. Now this is loose. I'm just going to use my Phillips head screwdriver, tighten this down a little bit. Don't tighten this too tight. You don't want to squish the battery, just so it has a little bit of tension on it. That's good, just like that. Take the positive terminal. When you're connecting a battery, you always want to connect positive first, opposite of how you take it off. That way you don't arc out anything. So tighten that down with a 10 millimeter socket and ratchet, just snug, not too tight, but make sure the terminal's tight. Then we can take the negative side, connect the negative side. Take the same 10 millimeter socket and ratchet, tighten it up. That's good. At this point, if you had that cover, you're going to want to put the cover back where it goes.

Thanks for watching. Visit for quality auto parts shipped to your door, the place for DIY auto repair. And if you enjoyed this video, please click the subscribe button.

Tools needed for replacement:

    General Tools

  • Scissors

  • Materials, Fluids, and Supplies

  • Marker / Writing Utensil

  • Ratchets & Related

  • Socket Extensions
  • Ratchet

  • Sockets - Metric

  • 13mm Socket
  • 10mm Socket

1988 - 1988  BMW  535is
1988 - 1991  BMW  325ix
1988 - 2001  BMW  750iL
1988 - 1992  BMW  735iL
1988 - 1995  BMW  325is
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1989 - 1995  BMW  525i
1992 - 1997  BMW  318iS
1991 - 1998  BMW  318i
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1991 - 1992  BMW  850i
2001 - 2006  BMW  325Ci
1998 - 1999  BMW  323iS
1988 - 1988  BMW  325e
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2010 - 2010  BMW  328i xDrive
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1996 - 1999  BMW  328iS
2007 - 2008  BMW  328xi
2008 - 2010  BMW  535i
2000 - 2010  BMW  M5
2006 - 2010  BMW  M6
2004 - 2008  BMW  X3
2008 - 2013  BMW  128i
2001 - 2007  BMW  530i
2001 - 2007  BMW  525i
2001 - 2006  BMW  325i
1999 - 2000  BMW  323i
2008 - 2013  BMW  135i
2008 - 2008  BMW  535xi
2004 - 2005  BMW  545i
2008 - 2008  BMW  528xi
2009 - 2010  BMW  535i xDrive
2006 - 2007  BMW  530xi
2006 - 2010  BMW  550i
2004 - 2005  BMW  645Ci
2006 - 2010  BMW  650i
2002 - 2005  BMW  745i
2006 - 2007  BMW  525xi
2007 - 2008  BMW  335xi
2010 - 2010  BMW  335i xDrive
2007 - 2013  BMW  335i
2009 - 2011  BMW  335d
2001 - 2006  BMW  330Xi
2001 - 2006  BMW  330i
2001 - 2006  BMW  330Ci
2008 - 2010  BMW  528i
2009 - 2010  BMW  528i xDrive
1997 - 2000  BMW  528i
2006 - 2010  BMW  750Li
2004 - 2006  BMW  760i
2002 - 2005  BMW  745Li
2006 - 2010  BMW  750i
2003 - 2008  BMW  760Li
1998 - 1998  BMW  323i

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