Complete Fuel Pump Assembly for BMW E31 V8 840i 840ci and V12 850Ci.
V8 M60 and M62 engines (1994-1999), V12 M73 engines (1995-1999).
Located under the passenger rear seat. Includes top rubber seal.
I received several questions and would like to clarify, this is NOT a 3D printed part. This pump has been in development for over 2 years and every component is precision injection molded just like the factory, with all shortcomings of the original design engineered out.
Changes and Improvements to the original pump design:
First, the most glaring problem is that up to 40% of the original fuel pump assemblies (both 850 and 840 units) begin to leak fuel at the what's called mold "parting line" at the top of the assembly right below the injection point mark. I believe this is a factory production miss where the parting line should have been reinforced and water cooled more sufficiently. After thermal expansion and contraction over the years micro cracks appear down this line and fuel starts to leak! My new design completely eliminates this issue making the top cap universally strong and crack resistant for a long term!
Original BMW wiring is insulated in material which has only partial resistance to regular fuel not to mention E10. Wires delaminate with time creating electrical shorts! I use only expensive 600v military grade PTFE insulated wire that will practically last forever inside the tank.
Original BMW fuel pump motor has copper commutators prone to jamming. It has been upgraded with a designed for application modern, very quiet, carbon commutator motor that will last 3 times longer in fuel including E85. New pump motor is capable of up to 150 LPH each on demand (up from OEM 140 LPH) and maintain factory pressure of 3.5 BAR pressure precisely.
The fuel level sensor, although similar in shape, has been re-engineered with modern components to be more precise and extremely long lasting.
E31-V12throttle.com
Don't forget to check out my other E31/E32 specific items available for sale!