BMW E39 M5 Fuel Pump Repair With DeatschWerks

After positioning the correct fuel resistant shrink tubing, we soldered the black pump wire to the black OEM wire and the red pump wire to the yellow OEM wire.

We used Raychem DR-25 fuel resistant shrink tubing from ProWire USA. The part number is DR-25-3/32-0-TW.  This is really handy stuff to have around the shop, so we didn’t mind buying a roll of it.

A quick blast of the heat gun got the shrink tubing all socked down.

We put the fuel pump sock that came with the universal kit in place, tapped down the metal retainer clip with a small socket and were ready to see if the set-up would drop in to our M5’s fuel tank. Unfortunately things did not go well on our first attempt. We found that the supplied sock’s offset was not going to work, as it was hitting the walls of the sump and preventing the assembly from dropping in. We would need a sock that would sit directly under the pump with very minimal overlap.

Thankfully the team at DeatschWerks was able to look through their vast catalog of fuel pump accessories and found us a smaller sock with an outlet that at first glance seemed like it would position it exactly where we needed it.

The new sock worked perfectly! For those of you who are curious, the sock came out of the DW400 kit DeatschWerks makes for the 92-06 BMW 3-series (part# 9-401-1052). We installed the new sock on the pump and we were ready to drop everything in place.

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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