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Old 01-20-2015, 05:51 PM   #1
Petebee
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Seat Bolt Question Newer Sport Seat in Older E30

Okay so I am trying to find a bolt that holds down the rear of the seat rail of my newer vintage E30 sports seats in my older vintage 1985 325e. I tried to both an M10x1.25 40 and M10x1.5 40 sized metric bolt but neither work.

Bolts that fit standard older sports seats use an M10x25-Z3 bolt, which I have (essentially a 25MM M10 bolt with a very unique thread pitch). Problem is they are too short for the later style seat rails, which are thicker and won't allow the bolt to thread into the unibody.

Can I just use an M10x32 bolt that RealOEM displays for use in later E30s? I assume these have the unique thread pitch that I am looking for.

Right now I have been able to secure three of the mounting nuts on the studs for the the drivers seat, but I can't get the rear nut secured on the passengers side. I am not comfortable driving around like that...figure if I can get the rear bolts installed that should pull the rear of the passengers seat down so I can also attach the nut on the stud in addition to the bolt.
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Old 10-13-2016, 09:00 PM   #2
yngtmr
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minor thread revival, but I'm going through the same problem right now, where did you source the new studs from? do you have the part numbers? any help would be very appreciated
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Old 12-04-2018, 08:53 PM   #3
Downeaster1
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Also bump. I have the same problem.
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Old 12-05-2018, 09:33 AM   #4
jeffnhiscars
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Ive never encountered any thread issues with seat mounting bolts or nuts. However the rails on early cars have a different depth so bolt lengths vary. My guess is that the threads need some love.
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Old 12-05-2018, 10:54 AM   #5
uturn
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Quote:
Originally Posted by jeffnhiscars View Post
Ive never encountered any thread issues with seat mounting bolts or nuts. However the rails on early cars have a different depth so bolt lengths vary.
Be sure to get the right length bolts because if too long they will rub the fuel lines under the car.
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