I was driving home and went over a hump in the road and when I passed over it I heard something come loose and bang the under carriage of my car. When I got under it to identify the problem I noticed that this bolt in the attached pics came off. can anyone help me identify the bolt part number so I can replace it?

 

That's the front crossmember the bolt goes into and I would not drive the car until you replace it. What year is the vehicle?
http://www.lexussouthatlantaparts.co...rimLevel=19107

 

It is a 92

 

Same concept, it's a bolt for the front cross member.

 

Right!
But I'm trying to figure out what the OEM part number for the bolt is though.
The dealers are closed out here so I am trying to find it online but they keep asking for the part number of the bolt and I don't have it

 

Look on the diagram in the link i posted.
http://www.lexussouthatlantaparts.co...rimLevel=19107

 

I appreciate it.
I've seen this diagram, but it looks as if it is only showing the bolts for the side of the crossmember.
There are two bolts on the side, 1 in the front and 1 in the rear.
I need the bolt for the rear side.
In the diagram I only located the 2 for the side.
I emailed the Lexus dealer, maybe they can shed some insight into that bolt on the rear.
I can't find it anywhere
I'm only finding the crossmember for sale n I just need the bolt.

 

why not take the other bolt out and go to the hardware store and get one??

 

That is actually my next step tomorrow if the dealer is charging an arm n a leg for the bolt.
I will pay a few dollars more if I can do less work.
I'm assuming that if I have both bolts off of the backside then it is going to knock my alignment off.
Good idea tho

 

I didnt mean to drive that car..... everybody has a friend.

 

I wouldn't be driving the car with both bolts off. I can't even drive it now with the one bolt missing. I was saying that I assume if I remove both bolts there would be no support to keep my alignment in tact, forcing me to realign it. Where as if I just replace the one bolt that is missing I might be able to slide by without having to do so.

 

that's not a crossmember bolt, it's a rack mounting bolt. Still not drivable without it.

'92 part numbers:
90119-12173 for the bolts
90179-12113 for the nuts