Installing Motion Underpanel

NolliM3 · Tue, Jul-03-2018, 04:56:22 PM

Those that have installed this underpanel...what do you do with this bolt in pic with the green arrow points to below? I am thinking of using and just ream out the hole of the bracket...just for knowledge, what's that bolt for?

Braymond141 · Tue, Jul-03-2018, 06:34:28 PM

That's where your original undertray attached and ripped off.

Do not use Motion's included expanding plastic nuts and do not reuse your original old ones. Buy new OEM parts. Motion's will pull out and your original are likely stripped.

You can also rivnut it as shown in my guide; http://www.m3forum.net/m3forum/showthread.php?t=590177

Bimmerman325i · Tue, Jul-03-2018, 06:51:29 PM

Quote:

Originally Posted by Braymond141

That's where your original undertray attached and ripped off.

Do not use Motion's included expanding plastic nuts and do not reuse your original old ones. Buy new OEM parts. Motion's will pull out and your original are likely stripped.

You can also rivnut it as shown in my guide; http://www.m3forum.net/m3forum/showthread.php?t=590177

Dumb question, but my nuts from Motion have done exactly that and pulled out.

Do you know what the OE part number is for those? I can't make heads or tails of the diagrams to find it.

bluptgm3 · Tue, Jul-03-2018, 09:43:32 PM

Quote:

Originally Posted by Bimmerman325i

My nuts from Motion have pulled out.
Do you know what the OE part number is for those? I can't make heads or tails of the diagrams to find it.

#6?

https://www.realoem.com/bmw/enUS/sho...diagId=51_2047

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Braymond141 · Tue, Jul-03-2018, 10:10:12 PM

51718242741 is correct.

Bimmerman325i · Tue, Jul-03-2018, 11:16:33 PM

Awesome, thanks!

NolliM3 · Thu, Jul-05-2018, 06:06:48 PM

Quote:

Originally Posted by Braymond141

That's where your original undertray attached and ripped off.

Do not use Motion's included expanding plastic nuts and do not reuse your original old ones. Buy new OEM parts. Motion's will pull out and your original are likely stripped.

You can also rivnut it as shown in my guide; http://www.m3forum.net/m3forum/showthread.php?t=590177

Awesome Brett...my local dealer had them in stock so I placed an order for four at $2 plus change total; however, I'll only have those two bolts as pictured in first post and what Motion supplied...I am also bidding on some stainless steel insert on eBay that I may cancel, since you used aluminum. Where did you get the inverted hex bolt?

Braymond141 · Thu, Jul-05-2018, 06:22:00 PM

Any home improvement store carries allen bolts. Home Depit, Lowes, Ace, True Value, etc etc

NolliM3 · Fri, Jul-06-2018, 02:30:28 AM

Here, you can really see the difference between the stock plastic insert to Motion's which is at the far right. Glad Brett recommended the stock ones.

bluptgm3 · Fri, Jul-06-2018, 04:58:18 AM

Quote:

Originally Posted by Braymond141

Any home improvement store carries allen bolts. Home Depit, Lowes, Ace, True Value, etc etc

I have found Ace or True Value to be better than Home Depot, and Lowe’s has slowly depleted stock over the years.

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Tue, Jul-03-2018, 04:56:22 PM	#1
NolliM3 Registered User Join Date: Jun 2014 Posts: 882 Reputation: 0 Location: Louisiana	Installing Motion Underpanel Those that have installed this underpanel...what do you do with this bolt in pic with the green arrow points to below? I am thinking of using and just ream out the hole of the bracket...just for knowledge, what's that bolt for? __________________ 1995 Alpine White...X-Brace, Fan delete, Cold Air Intake

Tue, Jul-03-2018, 06:34:28 PM	#2
Braymond141 Registered User Join Date: Aug 2005 Posts: 20,404 Reputation: 0 Location: Oakhurst, CA	Re: Installing Motion Underpanel That's where your original undertray attached and ripped off. Do not use Motion's included expanding plastic nuts and do not reuse your original old ones. Buy new OEM parts. Motion's will pull out and your original are likely stripped. You can also rivnut it as shown in my guide; http://www.m3forum.net/m3forum/showthread.php?t=590177 __________________ 1996 M3 Journal \| 1998 M3 Journal \| MSportParts \| @Braymond141

Tue, Jul-03-2018, 10:10:12 PM	#5
Braymond141 Registered User Join Date: Aug 2005 Posts: 20,404 Reputation: 0 Location: Oakhurst, CA	Re: Installing Motion Underpanel 51718242741 is correct. __________________ 1996 M3 Journal \| 1998 M3 Journal \| MSportParts \| @Braymond141

Thu, Jul-05-2018, 06:22:00 PM	#8
Braymond141 Registered User Join Date: Aug 2005 Posts: 20,404 Reputation: 0 Location: Oakhurst, CA	Re: Installing Motion Underpanel Any home improvement store carries allen bolts. Home Depit, Lowes, Ace, True Value, etc etc __________________ 1996 M3 Journal \| 1998 M3 Journal \| MSportParts \| @Braymond141

Fri, Jul-06-2018, 02:30:28 AM	#9
NolliM3 Registered User Join Date: Jun 2014 Posts: 882 Reputation: 0 Location: Louisiana	Re: Installing Motion Underpanel Here, you can really see the difference between the stock plastic insert to Motion's which is at the far right. Glad Brett recommended the stock ones. __________________ 1995 Alpine White...X-Brace, Fan delete, Cold Air Intake

Tue, Jul-03-2018, 11:16:33 PM	#6
Bimmerman325i Beardface McMountainMan Join Date: Aug 2009 Posts: 1,363 Reputation: 0 Location: Menlo Park	Re: Installing Motion Underpanel Awesome, thanks! __________________ 1995 BMW M3/2/5-- S54/Mk60 California Smog Legal (Build Thread) 1998 BMW M3/4/5 -- DD rev1 2017 Chevrolet SS, 6MT, Orange Blast Metallic -- DD rev2

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