So we have a 2005 Civic Si with 4 wheel ABS that has 4 bolt hubs rather than the more common 5 bolt ones. The issue is our rear bearing are going, and I cannot seem to find which bearing assembly I need. All the Si bearing assemblies I find are 5 bolt, and my normal online suppliers all say they don't have rear bearing assemblies for it. Any suggestions?

 

If the earlier model SI's with that body style came with 4 bolt hubs, you may be able to use one of those. search for 2002 SI hubs

 

When did they switch to a 5 bolt pattern on the Si. I know all the civics went 5 bolt in the 2006 model year, but did the Si all go 5 bolt in 2005, or were there early production ones with the 4 bolt?

 

I believe your model SI switched in 2004.