This may very well be the dumbest question ever posted but here goes...

then join here, the best site for an '89

Well, there is a typo in your post as there was no 1989 25is, but I will assume that you have a *3*25is since I know that the 525 came as a coupe (the "s"), so...

This is what the the PS reservoir looks like on your car:

It should have a bunch of hoses hooked up between it and the PS pump. That looks like this:

The lid for the reservoir should indicate what type of fluid you need for your system.

be sure you put the proper fluid, READ the reservoir lid carefully.... 11s or 7s are the options I believe!

Yes, I do have a 325is. Thanks to all. And the power steering fluid I have is leftover from the mechanic who put it in the last time so it has to be the right kind.

Thanks aga>> I have an older BMW (1989 25is). My power steering is low. I have no idea

Now that's what I call a rash assumption :-)

Oh dear. ;-)

I agree, CHECK FIRST!!!

And the power steering fluid I have

What I want to know is how does he know that the fluid is low if he doesn't know where the reservoir is?