Rear Control Arm Eccentric Bolt Question

[Markymarkk]

I’m currently swapping out the suspension of my car and when removing the eccentric bolt on the driver side rear control arm the impact must’ve messed up the threads, so I ordered a replacement bolt.

The bolt came in but looks like a totally different size, I confirmed with FCP before ordering that it’s the correct part number. I even called bmw parts and they also confirmed it’s the right part number.

Honestly not sure what to do at this point has anyone ever experienced this?

I attached a picture for reference.
FCP bolt
Diameter : 10.9mm
Washer diameter: 28mm
Length: 84.5mm

Bolt off car:
Diameter: 14mm
Washer diameter: 33mm
Length: 105mm

[M3SQRD]

Originally Posted by Markymarkk

I’m currently swapping out the suspension of my car and when removing the eccentric bolt on the driver side rear control arm the impact must’ve messed up the threads, so I ordered a replacement bolt.

The bolt came in but looks like a totally different size, I confirmed with FCP before ordering that it’s the correct part number. I even called bmw parts and they also confirmed it’s the right part number.

Honestly not sure what to do at this point has anyone ever experienced this?

I attached a picture for reference.
FCP bolt
Diameter : 10.9mm
Washer diameter: 28mm
Length: 84.5mm

Bolt off car:
Diameter: 14mm
Washer diameter: 33mm
Length: 105mm

Is this the p/n you ordered?

07146888627

Edit: you want the p/n above which is item 14 in the pictures.

What you ordered was item 7 (3330678480), M12X1.5X85-10.7

Both items are eccentric bolts. 07146888627 is for the lower camber arm whereas 3330678480 is for the lower wishbone.

[Markymarkk]

Originally Posted by M3SQRD

Is this the p/n you ordered?

07146888627

Edit: you want the p/n above which is item 14 in the pictures.

What you ordered was item 7 (3330678480), M12X1.5X85-10.7

Both items are eccentric bolts. 07146888627 is for the lower camber arm whereas 3330678480 is for the lower wishbone.

Thank you so much for the detailed response, I really appreciate it!

Just ordered item 14!

[robbo mcs]

In regard to messing the threads up.

Those bolts are a kind of self tapping bolt, they have a slight taper, and the thread is quite relatively soft. They are definitely a once only use bolt. The new bolt will re-tap the thread

If you have reused the bolt on the opposite side, you should change it as well

[M3SQRD]

Originally Posted by Markymarkk

Thank you so much for the detailed response, I really appreciate it!

Just ordered item 14!

You’re welcome

Realoem.com allows you to look up any item you’ll ever need for your car. Once you enter your vin or put in your model info at the very bottom of the page, bookmark it so you won’t have to renter your info.

[dzxy]

Originally Posted by robbo mcs

In regard to messing the threads up.

Those bolts are a kind of self tapping bolt, they have a slight taper, and the thread is quite relatively soft. They are definitely a once only use bolt. The new bolt will re-tap the thread

If you have reused the bolt on the opposite side, you should change it as well

This is incorrect in all ways. The bolt is not self tapping, the channels in the thread are meant for the eccentric washer tabs to lock orientation. The bolt is also not tapered, I measured the diameter at the beginning of the thread all the way to the end end of the thread and also the shank. The threads are also not that soft, it's a steel bolt and takes 165nm of torque. And they are not once only use bolt, mine with 140k kms on it had minimal corrosion on it and torqued down just fine.