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2019+ BMW 3 AND 4-SERIES FORUMS (G2x Generation) Local Forums UK G20 roof bars

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      07-25-2019, 03:23 AM   #1
snusnu
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G20 roof bars

Hi Guys.

Does anyone know, if roof bars from previous generations have same fitting elements which would fit G20?

I am thinking to look for OEM roof bars but wonder if there's more choice than ones from the dealership
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      07-25-2019, 10:22 AM   #2
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Quote:
Originally Posted by snusnu View Post
Hi Guys.

Does anyone know, if roof bars from previous generations have same fitting elements which would fit G20?

I am thinking to look for OEM roof bars but wonder if there's more choice than ones from the dealership
I have a set of after market Cruz roof bars and fittings for my previous F30 - they are an exact fit for the G20 - however the bolt size is larger on a G20's roof - used to be M6 on the F30, M8 is too big on G20 so assuming its an M7 bolt..... but still have not borrowed a mates m7 tap to test fit this theory
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New Car - G20 320d Sport - Sunset Orange, Oyster leather interior

Previous New Car - X1 Sdrive M Sport - returned it - hated it

Old Car - F30 320d ED in Mineral White
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      07-26-2019, 03:20 AM   #3
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Quote:
Originally Posted by Thompjas View Post
I have a set of after market Cruz roof bars and fittings for my previous F30 - they are an exact fit for the G20 - however the bolt size is larger on a G20's roof - used to be M6 on the F30, M8 is too big on G20 so assuming its an M7 bolt..... but still have not borrowed a mates m7 tap to test fit this theory
hmm, please do and report back
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      08-01-2019, 10:05 AM   #4
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FYI Thule have released a fitting kit for the G20 - Kit 3174 Fixpoint XT. Looking at the instructions for this kit it includes a tap to rethread the fixing points on the roof.
I also looked at the BMW roof rack, part number 82712457808, which according to my local dealer “On first installation, the threads in the roof channel must be re-cut with a thread-forming screw (included in the installation material)”.
Not sure I fancy doing this to a brand-new car…
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      08-01-2019, 11:54 AM   #5
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Quote:
Originally Posted by Dagobah View Post
FYI Thule have released a fitting kit for the G20 - Kit 3174 Fixpoint XT. Looking at the instructions for this kit it includes a tap to rethread the fixing points on the roof.
I also looked at the BMW roof rack, part number 82712457808, which according to my local dealer "On first installation, the threads in the roof channel must be re-cut with a thread-forming screw (included in the installation material)".
Not sure I fancy doing this to a brand-new car…
I fitted a Thule bike rack to my 5 series, it needed to be recut before fitting as BMW paint over and into the bolt holes so the first time you use it you need to use the supplied tool to cut the paint out if that makes sense.
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      06-03-2020, 04:26 PM   #6
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Thumbs up Installed Roof Rack from E92 (2013 335) on G20 (2020 M340)

Hi everyone, Thought this info might help someone else. I just got my G20 and wanted to transfer the roof rack from my E92 to it. Initially I found that the anchor bolts needed to be larger (as most have found here) I can confirm that that a M7 x1 20mm length worked very well. I did have to chase the thread with a tapered tap to clean out the hole (very light cutting) I also had to tweak the distance between the feet of the roof rack a little to get it to line up well but that was easily accomplished by loosening the screws on the underside and adjusting to fit. Sides closed well and locked and of course the sun roof also clears no problem (wasn't really a concern)

So to summarize
M7 x 1 SHCS 20 mm long and chase with a tapered tap for installation.

Hope this helps someone else !!

I happen to buy the M7 screws on amazon, not easy to find and
griped about the price a bit but they worked well Link below

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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      06-15-2020, 09:21 PM   #7
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to Primuerta

I have the exact same problem on my 2020 330i xDrive. I'm nervous about jamming the M7 bolt through. Clearly my "old" rack with the M6 bolt does not work. I did exactly as you and tweaked the feet of the crossbars for a perfect fit - easy enough. Just nervous about harming the fixed nut in the roof with the new M7 bolt.
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      06-22-2020, 08:30 AM   #8
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Quick update

Just completed a 300 Mile trek with the rooftop box on my bars. Rode well.
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      06-22-2020, 04:11 PM   #9
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Quote:
Originally Posted by primuerta View Post
Just completed a 300 Mile trek with the rooftop box on my bars. Rode well.
What size roof box is that? I currently have a Thule Motion 800, and whilst its the perfect size for my Volvo XC60, i fear its going to be too big for my G20 when it eventually arrives.
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      06-22-2020, 04:16 PM   #10
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It's a Thule hyper xl. Fits really well
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      06-22-2020, 04:53 PM   #11
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Just going through this at the moment. I have the Thule wing bars with bike racks and 753 feet. Need to get the 4023 kit for them which apparently was also for the F30.

Couldn’t find them anywhere as seem to be discontinued. Ordered some from eBay coming from Germany. Hope this works else could be expensive getting new feet as well.
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      07-05-2020, 02:21 AM   #12
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Fitted the 4023 kit yesterday and tried it out. Fitted perfectly so would seem at least the F31 Touring and G21 Touring rails are the same.
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      08-14-2020, 01:13 PM   #13
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Thule roof rack

Hello all, first post
just have 330e g20 from old 2015 320d

Old Thule roof rack won’t fit as m7 now from m6

Could get the Thule 3174 adaptor kit anywhere all out stock. Need a roof rack for the holiday now

Solution use m6 helicoil kit that uses a m7 x1.0 thread sorted. Old Thule 753 m6 thread now fits

Will get the proper kit when back in stock
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      08-14-2020, 01:53 PM   #14
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Wast it not possible just to use a M6 bolt?
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      08-14-2020, 04:02 PM   #15
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Quote:
Originally Posted by Ted1050 View Post
Hello all, first post
just have 330e g20 from old 2015 320d

Old Thule roof rack won’t fit as m7 now from m6

Could get the Thule 3174 adaptor kit anywhere all out stock. Need a roof rack for the holiday now

Solution use m6 helicoil kit that uses a m7 x1.0 thread sorted. Old Thule 753 m6 thread now fits

Will get the proper kit when back in stock
Got mine from here. https://www.roofracks.co.uk/rapid-fitting-kit/p/1890. Says it is in stock.
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      08-14-2020, 04:19 PM   #16
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Thanks will order one , although had the helicoil in the garage so got me going on the holiday.

Surprised the m7 thread in the car roof was quite tight and needed a tap down to clean the bottom threads for sure. Doesn’t seem right having to clean the threads on a new car with tap.

I was going to order some m7 bolts , although non standard and would take a few days to arrive.

Last edited by Ted1050; 08-14-2020 at 04:24 PM..
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      09-15-2021, 07:57 PM   #17
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90% there...

Quote:
Originally Posted by primuerta View Post
Hi everyone, Thought this info might help someone else. I just got my G20 and wanted to transfer the roof rack from my E92 to it. Initially I found that the anchor bolts needed to be larger (as most have found here) I can confirm that that a M7 x1 20mm length worked very well. I did have to chase the thread with a tapered tap to clean out the hole (very light cutting) I also had to tweak the distance between the feet of the roof rack a little to get it to line up well but that was easily accomplished by loosening the screws on the underside and adjusting to fit. Sides closed well and locked and of course the sun roof also clears no problem (wasn't really a concern)

So to summarize
M7 x 1 SHCS 20 mm long and chase with a tapered tap for installation.

Hope this helps someone else !!

I happen to buy the M7 screws on amazon, not easy to find and
griped about the price a bit but they worked well Link below

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Had a roof rack for my E90 (2009 328i) that fit perfectly on my F30 (2014 328i)....and now I have a 2019 330i x drive.

Clearly I need to switch out the M6 for the M7, but this doesn’t look easy as I may need to cut the M6 bolts to come out? How did you get the M7 bolts in? I’d love to keep using the same rails. They fit perfect, its just bolt fitment now...

Follow up question: Does the original installation tool work with the bolts in the amazon link? Are there OEM M7 roof rack bolts that anyone has found?

Last edited by Curtiswg; 09-15-2021 at 08:04 PM..
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      09-17-2021, 03:21 PM   #18
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One thing to watch with the newer Evo wingbars is that the Thule load stops don't fit, and I'm not aware of any third party ones that do either.

Obviously doesn't affect things like cycle carriers, but if you want to pick up some doors or lengths of wood from B&Q then load stops are incredibly useful. It's madness to have that t-track and not be able to use it properly.
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      09-19-2021, 07:39 AM   #19
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Quote:
Originally Posted by primuerta View Post
Just completed a 300 Mile trek with the rooftop box on my bars. Rode well.
That’s a beautiful colour on your car

Sorry, no input for roof bars
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      08-28-2022, 06:41 PM   #20
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Quote:
Originally Posted by primuerta View Post
Just completed a 300 Mile trek with the rooftop box on my bars. Rode well.
Do you have a side profile shot of this?
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