BMW E39 M5 Fuel Pump Repair With DeatschWerks

This is what our DW300 looks like after removing the tabs. We just used a set of small zip-tie dikes. They’re pretty easy to cut off since this part of the pump is plastic, but be very careful to not trim beyond the surface.

Here you can see that even with the tabs cut off the DW300 sits just deep enough in the OE carrier to allow the filter-sock to be installed, but it will definitely work.

When compared to the OEM pump you can really see how much smaller the body of the DW300 is, even though it flows a lot more. With the tabs cut off and the addition of the foam sleeve the DW300 pump fits nicely in the OE hanger and we’re confident it will be a solid long term and maintenance free solution.

The DW300 pump on the bottom has a different output hose bib orientation and a very different electrical connector. The OE connector will need to be cut off and we’ll need to solder in the DW connector supplied with the universal kit.

First we connected the OE fuel line right to the DW300 pump using the OEM hose clamp. Though it was oriented completely different everything went together without any hassle.

Next, we stripped the pigtail wires off of the supplied plug. We cut the plug off the OEM pump wires and stripped them as well.

2 comments

  1. Hi, I have tried to email a couple years ago about this but the filter sock shown in page 4 is not from kit 9-401-1052. I have had a couple customers ask about this filter and this is not the correct one. Notice in the links below. The 400 utilizes an entirely different filter sock than most standard pumps. PLEASE change the part number to kit 9-1034. That kit has the correct filter for what you are trying to accomplish.

    TLDR:
    9-401-1052 incorrect, 9-1034 correct.

    Sincerely, Your friendly neighborhood DW Employee

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