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Fix Your Rear Deck Lid/Parcel Shelf Rattle DIY (Tennis Ball Mod)

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    Fix Your Rear Deck Lid/Parcel Shelf Rattle DIY (Tennis Ball Mod)

    This has been gone over before in previous forums, but I decided to make a new DIY for those who may need the info on here. After age the rear deck lid/parcel shelf starts to rattle with the Harman Kardon subwoofer when songs with moderate to strong bass are played (sometimes even minimal). There are many ways to fix this, but I used the tennis ball method. Hopefully this helps someone finally get rid of that annoying rattle.

    Here is a picture of the Harman Kardon sub, it is located in the trunk, under the deck lid.
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    The tools you need are a 8mm socket, an appropriate ratchet, a trim removal tool or a flat head screw driver, and of course tennis balls.
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    There are 4 black screws and 2 white clips which hold the subwoofer in place. Note that there are no screws holding the rear of the subwoofer. I have already removed the screws out of the front side in the picture below.
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    Left side:
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    Right side:
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    After removing the 4 screws, you need to pop out the white tabs on the front, I used the trim removal tool to pry them off.
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    After this your subwoofer should fall down, be careful not to strain the wires that are connected. You can see the white clips more visibly now.
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    You can choose to either disconnect the plug at the sub to clean out the subwoofer itself or place it on something that doesn't strain the wires.
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    If you look up now you'll see the two holes and also be able to feel the underside of the deck lid.
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    Feel around for the deck lid and wedge the tennis balls in to prevent rattle, make sure to take a look from the interior of the car to make sure the parcel shelf/deck lid has not popped up.
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    The re installation is everything but backwards, make sure to insert the two tabs facing the rear seats into their appropriate slots to get correct fitment.
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    As stated before, the reinstallation is pretty straightforward. I hope this helps or maybe informs someone how to remove the sub for other purposes.
    Last edited by Deen HK; 05-01-2020, 12:56 AM.
    996TT
    Turbo E36 M3
    FZJ80

    #2
    Going on 11 years with tennis balls stuffed up there 馃槂
    DD: /// 2011.5 Jerez/bamboo E90 M3 DCT Slicktop Instagram
    /// 2004 Silvergrey M3 Coupe 6spd Slicktop zero options
    More info: https://nam3forum.com/forums/forum/m...os-supersprint

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      #3
      Just me or pics not working?
      Edit: fixed now
      Last edited by BMWahba; 05-01-2020, 05:45 AM.

      Current:

      1997 BMW M3 - Boston Green/Modena
      2003 BMW M3 Coupe 6MT - Alpine White/M-Texture Alcantara

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        #4
        I have the same craftsman toolkit from the early 2000's. LOL great investment. I'll be doing this when update my system.

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          #5
          Not to hijack the thread but out of genuine curiosity - was there ever any sort of reasonable DIY put together for later model cars? Obviously tennis balls did nothing for my Sept 2004 production date coupe.
          E46 M3 Coupe - 09/04 Production, 103k miles, Black/Black, 6MT swap, AS 0% kit, BBS RG-R + AS4鈥檚, CSL flash, Karbonius airbox, Euro header + Section 1, Koni Yellow, Xtrons, SAP Delete, lockdowns complete

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            #6
            wat?
            DD: /// 2011.5 Jerez/bamboo E90 M3 DCT Slicktop Instagram
            /// 2004 Silvergrey M3 Coupe 6spd Slicktop zero options
            More info: https://nam3forum.com/forums/forum/m...os-supersprint

            Comment


              #7
              Originally posted by m3nt0s View Post
              Not to hijack the thread but out of genuine curiosity - was there ever any sort of reasonable DIY put together for later model cars? Obviously tennis balls did nothing for my Sept 2004 production date coupe.
              I read a while back that on later model cars people go from the top, and pop the rear speakers out and stuff rags/cloth/tennis balls in the center off the rear shelf. Not sure how accurate that is though and if it will work. I didn't know the LCI version had a different trunk/sub setup compared to the older model ones
              Last edited by Deen HK; 05-14-2020, 12:42 PM.
              996TT
              Turbo E36 M3
              FZJ80

              Comment


                #8
                Apparently, it's obvious.
                DD: /// 2011.5 Jerez/bamboo E90 M3 DCT Slicktop Instagram
                /// 2004 Silvergrey M3 Coupe 6spd Slicktop zero options
                More info: https://nam3forum.com/forums/forum/m...os-supersprint

                Comment


                  #9
                  I know this is a popular thing, but am I the only one that never had that rattle?

                  Comment


                    #10
                    Originally posted by kokgo20 View Post
                    I know this is a popular thing, but am I the only one that never had that rattle?
                    *knock on wood* I've never had rattles either

                    Comment


                      #11
                      Originally posted by kokgo20 View Post
                      I know this is a popular thing, but am I the only one that never had that rattle?
                      Yeah my car doesn't do it either.
                      2002 Topasblau M3 - Coupe - 6MT - Karbonius CSL Airbox - MSS54HP Conversion - Kassel MAP - SSV1 - HJS - PCS Tune - Beisan - MK60 Swap - ZCP Rack - Nogaros - AutoSolutions - 996 Brembos - Slon - CMP - VinceBar - Koni - Eibach - BlueBus - Journal

                      2012 Alpinweiss 128i - Coupe - 6AT - Slicktop - Manual Seats - Daily - Journal

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                        #12
                        I stuffed six of 'em in there and I still get a subdued rattle, which disappears when the weather gets above 60 deg F.
                        The added weight high up is sapping my S54 power and has a negative impact on the handling.

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                          #13
                          I just did this and it worked like a charm! Some notes:
                          -I have a 2003.5 without HK so there was no sub to remove and subsequently no massive holes where the sub mounts
                          -I shoved tennis balls in the oval holes nearer to the front of the car and then pushed them towards the rear once in
                          -Had to make some serious gauges in the balls so that they would deform enough to fit

                          Comment


                            #14
                            Don鈥檛 you suppose to cut balls in halves?

                            Comment


                              #15
                              Originally posted by FBloggs View Post
                              I stuffed six of 'em in there and I still get a subdued rattle, which disappears when the weather gets above 60 deg F.
                              The added weight high up is sapping my S54 power and has a negative impact on the handling.
                              You have to get the carbon fiber balls. You need less weight that high. It'll completely negate your CF roof.

                              Click image for larger version

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                              This is my Unbuild Journal and why we need an oil thread
                              https://nam3forum.com/forums/forum/m...nbuild-journal

                              "Do it right once or do it twice"

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