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      07-03-2020, 11:55 AM   #3
ezaircon4jc
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Drives: 2019 540i M Sport
Join Date: Jan 2015
Location: San Diego

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I don't know what the F10 looks like underneath, but I dropped a bolt once on my previous car and searched an hour or more before I found it. It was on a longitudinal crash brace that went from the "frame" to the front clip. You might try poking a magnetic probe around under the car and see it that finds it. Look for someplace a socket could wedge itself. A bright light helps.

For some reason I lose more 10mm's than any other socket! I have 3 or 4 at any one time. I also have an extra 8mm & 7mm... There was one 7mm bolt I had to remove to change the spark plugs on my last car (yeah, that's the theme because I haven't had to do anything on our BMW's yet) that was between the brake booster and the valve cover. There was only room for a wrench and at that I could only turn it a few degrees. I got a tip from someone who had been there, done that and tied a string around my wrist and the wrench. GREAT TIP as I dropped that wrench regularly and didn't have to go fishing under the car for it!
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