I know a yard that has a 1991 750iL. Will that cars fuel pump work on a 1992 525i? Thanks.

I don't see why not.

Just double checked, it's actually a 1992 750iL, not 1991. Yeah, it seems like it would work. What tools does it take to remove one? It's a pull-it-yourself yard.

realoem.com if your friend.

I already checked realoem, it says only the E34 pumps will work. This is incorrect, as car-part.com lists many other models with the same pump as interchange.

http://bmwfans.info/original/images/2338_p.png (http://bmwfans.info/original/E34/Lim/525i-M50/USA/L/A/1991/09/mg-16/)

It is #6, correct? Part number 16 14 7 161 387

http://www.realoem.com/bmw/partxref.do?part=16+14+7+161+387&showus=on

Note it only offers E34's as a cross. If you search car-part.com for "fuel pump" they have a lot of other cars (735i, 740i, etc)

I'm using the pump out of a 525 in my 530. There really is no major difference.

Does this mean it will not work? And that Car-Part.com is wrong?

I'm using the pump out of a 525 in my 530. There really is no major difference.

Exactly!!! Realoem does not list the 530 as a cross. Realoem sucks on cross reference.

But basically what you are gunna need to do is, take off the cover in the back right of your trunk, disconnect the lines. MARK WHICH ONE GOES WHERE. Take off all the 10mm (IIRC) nuts. Lift it out, lift the floater thing, then reach down into the tank and unclip the stock pump. Take it out, connect the hoses and the 2 wires to the same spot on the new pump. Installation is reverse of removal. It took me about 20 minutes to do. Outside. In the rain. At 11pm.

EDIT: The only real difference is output pressure. the stock 530 pump is rated at 51. The one out of the 525 run at 47 as per my check.

Sweet. Ok, gonna grab a socket set and head out. Thanks for all your help on this problem dyetrying91. Really appreciate it.

It's absolutely no problem. The same thing happened literally two weeks ago to me.

Exactly!!! Realoem does not list the 530 as a cross. Realoem sucks on cross reference.

You may be a bit too hasty...in that you may not understand exactly what you're looking at on Realoem.

The diagrams (which are just like the ones in the BMW ETK CD) may show more components than are used on your car...BUT...when you look down in the part nbr index...you will see that not all the items in the diagram are listed or are the same. NON listed items in the part nbr index aren't for the car that you are searching for.

Now, when you go back to the diagram and look at #1...you will find that the same diagram shows up for the e32 (M30 & M60 engines) AND the e34 (M20/M50/M60/S38 engines)...and all of the models that were mentioned in this thread DO appear using the SAME diagram and ALL use the same #1 (sending unit). You have to pay attention to the part nbr index BELOW the diagram to retrieve the info that is specific for each model and see where the slight differences occur.

Here's a direct link to item #1 (the SENDING UNIT ASSY METAL TANK) and you will see that when you click on either the 7 or 5 series links...they will take you all to the same diagram. Some of them use item #6 and some of them don't..and some of them have a DIFFERENT #6 part nbr: http://www.realoem.com/bmw/partxref.do?part=16141180889&showus=on

Make sure you understand the info you're looking at before you toss it out as being inaccurate. :D It appears that you can interchange the sending units between the e32/e34 with I6 & V8 engines...but there are some other components that make up the sending unit/pumping assembly that are either exclusive to a particular models sending unit or different.

I disagree with your sentiment...I think Realoem "ROCKS" because it allows me to keep from making bad or wrong decisions...and if I study the diagrams and part nbr index correctly...I can keep myself from wasting time and making huge mistakes....like using the assembly from the e32/e34 I6 or V8 instead of the V12. :D

I just installed the pump, and it did fit. Had to disconnect it from it's brackets though, as the 750iL uses 2 pumps (v12 engine needs 2 I guess).

http://bmwfans.info/original/images/2298_p.png (http://bmwfans.info/original/E32/Lim/750iL-M70/USA/L/A/1992/09/mg-16/)

The pump #4 is part number 16 14 1 179 710, and according to realoem it only works on the 750iL. Wonder what the difference is, if any?

You may be a bit too hasty...in that you may not understand exactly what you're looking at on Realoem.

The diagrams (which are just like the ones in the BMW ETK CD) may show more components than are used on your car...BUT...when you look down in the part nbr index...you will see that not all the items in the diagram are listed or are the same. NON listed items in the part nbr index aren't for the car that you are searching for.

Now, when you go back to the diagram and look at #1...you will find that the same diagram shows up for the e32 (M30 & M60 engines) AND the e34 (M20/M50/M60/S38 engines)...and all of the models that were mentioned in this thread DO appear using the SAME diagram and ALL use the same #1 (sending unit). You have to pay attention to the part nbr index BELOW the diagram to retrieve the info that is specific for each model and see where the slight differences occur.

Here's a direct link to item #1 (the SENDING UNIT ASSY METAL TANK) and you will see that when you click on either the 7 or 5 series links...they will take you all to the same diagram. Some of them use item #6 and some of them don't..and some of them have a DIFFERENT #6 part nbr: http://www.realoem.com/bmw/partxref.do?part=16141180889&showus=on

Make sure you understand the info you're looking at before you toss it out as being inaccurate. :D It appears that you can interchange the sending units between the e32/e34 with I6 & V8 engines...but there are some other components that make up the sending unit/pumping assembly that are either exclusive to a particular models sending unit or different.

I disagree with your sentiment...I think Realoem "ROCKS" because it allows me to keep from making bad or wrong decisions...and if I study the diagrams and part nbr index correctly...I can keep myself from wasting time and making huge mistakes....like using the assembly from the e32/e34 I6 or V8 instead of the V12. :D

So if a part number isn't listed on the index, the part itself (though shown in the diagram) is not used on that particular model car?

So if a part number isn't listed on the index, the part itself (though shown in the diagram) is not used on that particular model car?

Correct. :) And like dyetrying91 wrote in his reply above...there might be some slight differences between some parts that appear to be similar but have different part nbrs. For instance...#6 has a different part nbr in the 530 & 525 diagram because they have a different output pressure...but the basic design is the same but many of the other parts are the same in that same sending unit assembly.

Sounds like you got it worked out from your post above...good going! :thumbup:

Typical that BMW would put two fuel pumps for M70 powered E32s....

Yes, the pump works (car works now, fixed issue - wasn't fuel pump). The two pumps only cost me $13, total of $6.50 a piece, and half an hour to pull them out of the car at the yard. :thumbup: