How to change fuel pump in a 2004 bmw x3 3.0 - 2004 BMW X3

Tell your "good" mechanic to get a hold of the schematic for your car to find out and trace the power line to your ignition system and components. Unless you get some spark you are SOL

First thing to do is run a fuel pressure leakdown test. borrow or buy a fuel pressure test gage for you car and hook it to the fuel injection rail test port, then start the engine and shut it off the pressure should not drop by more than 5 PSI, if overnight it drops to near zero PSI you have a failed fuel pump pressure check valve and you need a new fuel pump. Also clean the throttle valve and the idle speed control valve with spray throttle valve cleaner.

should have an access panel to the fuel pump...all the other bmw's do....

I'm guessing that you got an air lock in your fuel system as a result of your changing the fuel filter... I certainly don't know about a BMW diesel, but in most semi-truck engines, there is a priming pump just for the purpose of getting the air out ... and the fuel into.... the fuel system. I've even been known to fill the filters with diesel fuel before screwing them onto the base.. This is risky because of the possibility of allowing some foreign, unfiltered debris to get into your pump and/or injectors, just because of your putting unfiltered fuel into your filter... Check and see if there is some kind of priming pump close to the filter. Also, a possibility is that you may have an electric fuel pump.... as to where all you may need to do is loosen a fuel fitting on the pressure side of the pump and filter.... and allow the electric pump to purge the system of air.. I confess to my lack of knowledge on your BMW.... but, I do have some basic understanding of most diesel systems... Good luck..

engine bay fuse box will be 2 one for the injectors and one for the pump both the same type.

If u hear the engine cranking in the AM, the batt & alt sound good. If you don't get any engine cranking in the am you may have an electrical short draining the battery. Before u convict the starter u must make sure the battery has full power in the AM. (12V) & 12 V to the starter

remove rear seat, it's just clipped in. remove fuel pump acces cover gasket, pull out fuel pump assembly. Hold off smoking till later. order online new pump for a third of the price. reinstall. bingo...done.

Hi, On the E85, MY03 - 09 a seperate fuel filter is absent. Unlike the E36/E46 which has an inline filter and is reaplceable as part of the maintenance items, the E85 does not have this 'feature'. The fuel filter is an integral part of the intank fuel pump [ which i believe is like the strainer.

In order to change the ff the entire pump assembly has to be replaced. On the safer side this is one of those items best left to be done by the dealer.

Regards Sean/elytics

how come you changed the DME?

if you did, you need to have your key reprogrammed by BMW at BMW.