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      03-14-2015, 12:50 PM   #1
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BMW Performance rear diffuser & Electric towbar

I would like to fit one of these to my F31 M Sport with the electric towbar option. I am being told that this cannot be done Anyone managed to fit one? What are the problems/issues that will be encountered?

kind regards, Kevin
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      03-14-2015, 12:52 PM   #2
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I understand you need to trim it a little, but you won't get a BMW dealer to do it for you.

I've just bought a diffuser and will change my exhaust too, so will let you know how I get on.

I have the tow bar too obviously!
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      03-14-2015, 12:54 PM   #3
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Quote:
Originally Posted by Tengocity View Post
I understand you need to trim it a little, but you won't get a BMW dealer to do it for you.

I've just bought a diffuser and will change my exhaust too, so will let you know how I get on.

I have the tow bar too obviously!
Cheers. I await with interest. Get out there & get them fitted
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      03-14-2015, 01:07 PM   #4
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What do you guys mainly tow? Caravans or trailers?

Also how does towing effect performance and MPG?
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      03-14-2015, 01:11 PM   #5
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Quote:
Originally Posted by F30Andy
What do you guys mainly tow? Caravans or trailers?

Also how does towing effect performance and MPG?
Nothing! Mine is just for using a bike carrier.

Useful in the future when I buy another track car as would allow me to get something very light and impractical, and trailer it.
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      03-14-2015, 01:14 PM   #6
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Quote:
Originally Posted by Tengocity View Post
Nothing! Mine is just for using a bike carrier.

Useful in the future when I buy another track car as would allow me to get something very light and impractical, and trailer it.
So your not a "strap four bikes to the roof" kind of guy then?

Any advantage to "balancing them on the towbar" or is that just personal preference? Or do you have a roof box too?
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      03-14-2015, 01:21 PM   #7
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Quote:
Originally Posted by F30Andy
Quote:
Originally Posted by Tengocity View Post
Nothing! Mine is just for using a bike carrier.

Useful in the future when I buy another track car as would allow me to get something very light and impractical, and trailer it.
So your not a "strap four bikes to the roof" kind of guy then?

Any advantage to "balancing them on the towbar" or is that just personal preference?
I used to do that, same with my kayak, but eventually you smack a buckle or pedal off the paintwork, or worse.

The rack at the back is more aerodynamic, so less noisy, and probably more fuel efficient.

And because it's low then my wife can help to load it too rather than just me.

I expect they are doubly useful if you've got a SUV.

I don't have a roofbox but I have bars so it's always an option!
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      03-14-2015, 01:41 PM   #8
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Quote:
Originally Posted by Tengocity
I understand you need to trim it a little, but you won't get a BMW dealer to do it for you.

I've just bought a diffuser and will change my exhaust too, so will let you know how I get on.

I have the tow bar too obviously!
Mine fitted to my F36 with towbar that i hook a bike carrier up to. I still need to check if they had to trim. Will let everyone know.
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      03-14-2015, 01:42 PM   #9
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I can see the wiring but can't see where it retracts to.

Do you have a pic with it extended?
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      03-14-2015, 01:50 PM   #10
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Quote:
Originally Posted by F30Andy View Post
I can see the wiring but can't see where it retracts to.

Do you have a pic with it extended?


This is helpful
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      03-14-2015, 01:51 PM   #11
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And this is nifty coding, though surely just for show!

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      03-14-2015, 01:52 PM   #12
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Quote:
Originally Posted by F30Andy
I can see the wiring but can't see where it retracts to.

Do you have a pic with it extended?
Just took just now for you. Also checked underneath and could see nor feel any cuts.
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      03-14-2015, 01:53 PM   #13
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Quote:
Originally Posted by Tengocity View Post
And this is nifty coding, though surely just for show!

That is brilliant, so much better than the aftermarket jobs.
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      03-14-2015, 01:55 PM   #14
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Quote:
Originally Posted by F30Andy View Post
That is brilliant, so much better than the aftermarket jobs.
That was my thoughts, and since I plan to keep the car for a long time I wanted to ensure it fitted all future motoring needs for me!
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      03-14-2015, 03:15 PM   #15
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Interested in this as was looking at a diffuser, but wondered how it would work with the tow bar.

I use mine just for a bike rack too. Had it from my RRSport as too high to get bikes on, but actually far more versatile than a roof system....especially after a day's dirty mountain biking, no crap over the car as you drive home

Anybody know what the coding required is to do that remote deploy - definitely want to do that . Do you sacrifice any function with the boot etc?
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      03-14-2015, 03:55 PM   #16
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Mine gets used for towing my mk1 rs2000 on a Brian James Clubman trailer. It also lugs a trailer tent around so gets quite a bit of use. Mountain bikes sit on the roof!
Ready to push the button on the diffuser & tail pipe but as said, every place I enquire say it can't be done
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      03-14-2015, 04:19 PM   #17
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Anyone know what the coding is to operate the electric towbar from the key fob rather than having to press the button in the boot ?
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      03-14-2015, 04:23 PM   #18
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Quote:
Originally Posted by Frosticles
Mine gets used for towing my mk1 rs2000 on a Brian James Clubman trailer. It also lugs a trailer tent around so gets quite a bit of use. Mountain bikes sit on the roof!
Ready to push the button on the diffuser & tail pipe but as said, every place I enquire say it can't be done
I'm sure independents will be absolutely fine doing it. I've bought the one from Taiwan that a few forum users recommended and the exhaust place confirmed that they'd have no problems with trimming a bit if required
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      03-14-2015, 04:35 PM   #19
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Quote:
Originally Posted by Tengocity
Quote:
Originally Posted by Frosticles
Mine gets used for towing my mk1 rs2000 on a Brian James Clubman trailer. It also lugs a trailer tent around so gets quite a bit of use. Mountain bikes sit on the roof!
Ready to push the button on the diffuser & tail pipe but as said, every place I enquire say it can't be done
I'm sure independents will be absolutely fine doing it. I've bought the one from Taiwan that a few forum users recommended and the exhaust place confirmed that they'd have no problems with trimming a bit if required
As mentioned BMW dealership in Scotland did without any question or issue. Diffuser and twin tailpipes fitted straight on an F36 with towbar factory fitted
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      03-14-2015, 04:57 PM   #20
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Quote:
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I'm sure independents will be absolutely fine doing it. I've bought the one from Taiwan that a few forum users recommended and the exhaust place confirmed that they'd have no problems with trimming a bit if required
I contacted the one from Taiwan (3Amotors) They said no, doesn't fit??????
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      03-14-2015, 05:00 PM   #21
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Quote:
Originally Posted by Frosticles
Quote:
Originally Posted by Tengocity View Post
I'm sure independents will be absolutely fine doing it. I've bought the one from Taiwan that a few forum users recommended and the exhaust place confirmed that they'd have no problems with trimming a bit if required
I contacted the one from Taiwan (3Amotors) They said no, doesn't fit??????
Yes that's who I got mine from so I hope it does! Will find out in next couple of weeks I guess.
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      03-14-2015, 05:40 PM   #22
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