Advice on using 540i fuel pump for M5? - The Unofficial BMW M5 Messageboard (m5board.com)

ehssan_alkhiyami · 23rd August 2006, 00:54

my fuel pupm makes a lot of problems recently , so I'm going to change it ..

but the question is , will the 540 fuel pump fits our M5 or it's different .. ?

thanks

aaronmiles · 23rd August 2006, 01:03

The part numbers are different yes...

16146752369 is the M5 unit

and

16146752368 is the 540 unit.

ehssan_alkhiyami · 23rd August 2006, 01:05

I understand , but physically it's exactly the same ,, I've seen it at the dealer ..there is no different at all , I was wondering what could be the different to make it 3 times more expensive ?? ..

anyone tried to replace the stock with 540 unit ?

Red line · 23rd August 2006, 10:15

Interesting question.
I assume the M5 pump has more gallons per minute flow rate or higher output pressure. Just guessing.

ehssan_alkhiyami · 23rd August 2006, 23:07

exactly ,, this is what I found out .. the normal 5 series fuel pump will work but you can easily feel the different in the acceleration . so I'll pick up the OEM tomorrow in the morning .. and as the same time I'll change the left fuel gauge leveler as well , the beast will have a brand new fuel pump and gauges levelers ... happy for her ..

DrewKeen · 24th August 2006, 00:01

The M5 pump flows more fuel. Is your fuel level sensor broken? If not there is no reason to replace it. The fuel pump is also located on the right (passenger) side of the car.

ehssan_alkhiyami · 24th August 2006, 00:04

Quote:

Originally Posted by DrewKeen

The M5 pump flows more fuel. Is your fuel level sensor broken? If not there is no reason to replace it. The fuel pump is also located on the right (passenger) side of the car.

Well acuatlly the new pump will come with the right leveler ,, and currently I'm having a problem that sometimes the fuel gauge gives a wrong information .. and anyway it's cheap to replace , something like 35 $ after discount .. so it worth it ..

aaronmiles · 24th August 2006, 01:37

Check the connections to the pump also.. I've seen it where they can become frayed overtime... by this I mean at the end that screws into the tank, not the actual pump end. They are covered by a plastic sheath that can come away etc.

I replaced mine when the resistance was rather high and thus not pumping as well as it should...