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2010 2011 BMW 5 Series Forum F10 DIY F10 535i OEM M5 diffuser retrofit with Foot Trunk Release Comfort Access |
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09-09-2013, 07:13 PM | #1 |
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DIY F10 535i OEM M5 diffuser retrofit with Foot Trunk Release Comfort Access
UPDATE as of 10/13/13... See Additional pix after Step 13
This is my first time posting a DIY so please be gentle. i'll try t be as detail as possible and excuse me with the grammar issues if any. First of all, you must have the M-sport rear bumper from what I gathered after reading numerous post. FYI, also, your F10 must be at least a 2012+ model as I believe the foot trunk release comfort access was not offered in MY2011. Tools/materials needed: - Dremel - 5/16 socket wrench - Velcro - zip ties - Blue painters tape (optional) Step 1: Lock your doors with the key fob and keep it away from the car so no electrical devices will be activated which will cause battery drainage. Next remove the diffuser Step 2: Take a look at what you have to deal with. The image below is the plastic piece which is already slightly trimmed on the bottom yet I haven't removed any of the comfort access module or TPMS module. Step 3: Locate Comfort Access Module Step 4: Locate Comfort Access Sensor Step 5: Locate Comfort Access Antenna Step 6: Locate TPMS module Step 7: Remove the TPMS modules from its holder along with the Comfort Access leave them hanging so you can start cutting the plastic. Also remove the Comfort access sensor by unplugging it and remove comfort access antenna by removing the 7 circular tabs. you'll have to pull very hard but be careful not to damage the antenna. This picture shows all the trimming done as necessary as I forgot to take a picture prior to it. Step 8: Start dremelling a long line across all the holes. See 2nd to the last picture Step 9: It should look something like this once you cut everything. Sorry for the dark picture as I was working on it at night. Step 10: Connect the middle insert diffuser with the big piece of the diffuser. try to insert it in after all the cutting from the plastic. You'll noticed snapping in the middle insert is a little difficult depending how well you cut the plastic. You may need to cut little rectangles for it to fit in properly as seen in my pix Step 10: Tape up the TMPS module on the metal rebar located behind the bumper. Secure it with painters blue tape or velcro and reconnect the wire to the module Step 11: Velcro the Comfort Access module on the section where the spare tire would be placed Step 12: Tape down the Comfort Access sensor towards the bottom of the middle insert of the diffuser then the comfort access antenna right above it. Connect the Comfort Access sensor and antenna wires back up the Comfort Access Module Step 13: snap the entire diffuser together and be sure to screw in the 3 metal screws that goes under the black middle insert and place zip ties in the pair of holes which overlap the big diffuser as the plastic push screw will no long keep both pieces together. If not, your entire diffuser will fly off on the road as I just experienced it today. SMH Hope this helps and sorry for the next 2 images. I dunno how to delete them but you'll noticed one of the images shows how I was dremelling across the comfort access sensor area. Good Luck and let me know if you need any help UPDATE as of 10/13/13...................................... Final product w/Litespeed exhaust. Sorry if its hard to see the angles of the diffuser but all I have to see is, Titanium tips on black diffuser is awesome!
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Last edited by gre8tw8LL; 10-14-2013 at 01:04 AM.. |
09-09-2013, 09:47 PM | #2 |
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Nice write up.
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09-16-2013, 03:53 PM | #3 |
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pls put mre pictures with the installation of the diffuser and the final outcome :-)
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09-16-2013, 04:13 PM | #4 |
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10-14-2013, 01:06 AM | #5 |
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New Pix added
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2012 535i Alpine White | Oyster Black Dakota Interior | Hamann Front Lip | LiteSpeed Catback Exhaust | M5 Diffuser| Painted Calipers & Reflectors | Black Gloss Grill | LED interior lights | Piaa Plasma Yellow Foglights | Born on 1/30/12
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10-14-2013, 10:18 AM | #6 |
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THanks for sharing..I'm so incline on doing this and love those tips...can you share where did you get thema dn the size ?
Also did you put them on the stock exahust or bought new ones ? I would like to keep my stock exhaust with the M5 rear diffuser..it seems there is space there to move them a bit inwards...any more pics of the layout from the bottom? Great job there!!
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10-14-2013, 11:06 AM | #7 | |
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FYI, from my understanding on reading other post, you will not be able to use the stock muffler and add dual exhuast tips as theres no room. Everyone one been either getting M5 OEM mufflers or purchasing Megan Racing axel back mufflers. Alignment of the muffers was very tough because of the existing hangers to hold the muffer and working with twisting the pipping as its bent. The tips are staggered and tried to align the outter tips flush with the diffuser.
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2012 535i Alpine White | Oyster Black Dakota Interior | Hamann Front Lip | LiteSpeed Catback Exhaust | M5 Diffuser| Painted Calipers & Reflectors | Black Gloss Grill | LED interior lights | Piaa Plasma Yellow Foglights | Born on 1/30/12
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10-14-2013, 11:26 AM | #8 | |
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I ended having a muffler shop cut the OEM mufflers near flush at the muffler, and the Cyba tips near flush at the inlet, and it fits perfect. I am using an OEM 550i Diffuser, and the tips do not stick out too far from the rear bumper as I have seen on some. Here are some pics:
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03-30-2014, 12:53 PM | #10 |
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Suggestion: Double check to see if the sensor and antenna are connected to the module. Also make sure the placement of the 2 above items are placed how I have it posted in my pix.
Worst comes to worst sceniro, hopefully the sensor and antenna wernt damage during removing and reinstalling. Good luck |
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08-31-2014, 10:24 AM | #12 |
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Nice writeup!
Here's a link to another post where they found the part number for the M5 adapter/absorber, which eliminates the need for any cutting in order for the Comfort Access to continue working with the M5 rear diffuser. http://f10.5post.com/forums/showthread.php?t=950378 |
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11-12-2017, 11:40 AM | #14 |
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Many have done it to the F10 MSports. Why do you think you can't?
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11-12-2017, 11:57 AM | #15 |
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"FYI, also, your F10 must be at least a 2012+ model as I believe the foot trunk release comfort access was not offered in MY2011." - OP
He's right, I have an '11 with no comfort access. I just don't understand why that means I can't put on an m5 diffuser |
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11-12-2017, 12:33 PM | #16 |
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All this means is that if you don't have CA, you don't have to worry about diffuser mods or moving the CA sensors when you install the M5 diffuser.
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02-28-2018, 01:58 PM | #17 | |
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i had no idea... I just purchased my 2015 F10... i will have to do some reading.
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