DeatschWerks 9-811-7071 X2 Dual Pump Module 2006-2015 BMW E9X E8X 135i 335i M3 X1

The DeatschWerks 9-811-7071 is an X2 dual pump module pre-loaded with two DW810 brushless fuel pumps, purpose-built for 2006 to 2013 BMW E9X and E8X chassis vehicles. The 9-811-7071 module replaces the factory fuel pump assembly with a drop-in unit capable of flowing up to 1,620 LPH combined, supporting well over 1,500 horsepower on pump gas and over 1,100 horsepower on E85. This is the complete ready-to-run solution for high-horsepower BMW builds that have outgrown a single pump, including turbocharged N54 and N55 powered vehicles running large power levels on any fuel.

Each DW810 brushless pump in the 9-811-7071 operates via a two-speed controller that runs at reduced duty cycle during normal driving and automatically ramps to full output under wide open throttle. Brushless motor technology eliminates the commutator and brush assembly that wear out in conventional brushed pumps, extending service life dramatically in high-demand applications. The complete drop-in X2 module retains all OEM fuel level sensing, surge bucket, and venturi functions, so the install requires no fabrication and the fuel gauge reads correctly after installation.

9-811-7071 Key Features

• Drop-in X2 dual pump module with two DW810 brushless pumps included
• Combined flow: up to 1,620 LPH at 40 psi (dual pump)
• Supports approximately 1,500 HP on pump gas and 1,125 HP on E85 per pump
• Brushless motor technology for extended service life and consistent output
• Two-speed controller: reduced speed at cruise, full output at WOT
• Retains OEM fuel level sensor, surge bucket, and venturi system
• No fabrication required, drop-in OEM fitment
• Compatible with all fuels including E85, E100, and methanol
• Backed by DeatschWerks 3-year no-fault warranty

Vehicle Fitment

Product Specifications

What's Included

• 1x X2 dual pump drop-in module assembly
• 2x DW810 brushless fuel pumps (pre-installed)
• Two-speed pump controller
• All required wiring and hardware for installation

Installation Notes

The 9-811-7071 is a drop-in replacement for the factory BMW E9X and E8X fuel pump module. Accessing the fuel pump requires removing the rear seat bottom on most E9X sedans or the cargo floor panel on coupe and wagon variants. The module drops into the OEM tank opening and retains the factory fuel sender float for correct gauge operation. A return style fuel system is required. DeatschWerks recommends upgrading the fuel pump wiring with a high-current relay kit to ensure maximum voltage at the pump under all operating conditions. Professional installation is recommended for vehicles being built for high power output.

Frequently Asked Questions

What vehicles does the DeatschWerks 9-811-7071 fit?
The 9-811-7071 fits 2006 to 2013 BMW E9X and E8X chassis vehicles including the 1 Series M, 135i, 135is, 325i, 328i, 328i xDrive, 330i, 330xi, 335i, 335i xDrive, 335is, M3, and X1 in sDrive28i, xDrive28i, and xDrive35i configurations.

How much horsepower does the 9-811-7071 support?
Each DW810 pump in the 9-811-7071 supports approximately 1,500 HP on pump gas and 1,125 HP on E85 at 60 psi. With two pumps running, the combined output is sufficient for builds far exceeding those figures, limited by other fuel system components rather than pump capacity.

Is the 9-811-7071 compatible with E85?
Yes. The DW810 brushless pumps in the 9-811-7071 are fully compatible with E85, E100, and methanol in addition to standard pump gasoline. The carbon commutator design and brushless motor construction are engineered to withstand the corrosive properties of ethanol-based fuels.

Does the factory fuel gauge still work after installing the 9-811-7071?
Yes. The 9-811-7071 retains the OEM fuel level sender float arm assembly, so the factory fuel gauge reads correctly after installation with no additional wiring or calibration required.

Why use brushless pumps instead of brushed pumps?
Brushless motors eliminate the carbon brush and commutator assembly that generate heat, wear, and electrical noise in conventional brushed fuel pumps. The brushless design in the DW810 pumps inside the 9-811-7071 produces consistent output throughout their service life with significantly less heat generation and longer operational lifespan compared to high-output brushed pumps.

Does the 9-811-7071 require a return fuel system?
Yes. A return style fuel system is required for proper operation of the 9-811-7071 dual pump module. Vehicles running a returnless OEM fuel system will need to be converted to a return style system prior to installation.

What is the warranty on the DeatschWerks 9-811-7071?
The 9-811-7071 is backed by DeatschWerks's 3-year no-fault warranty. This covers defects in materials and workmanship. DeatschWerks's no-fault policy is among the most comprehensive in the performance fuel pump market.

Does the 9-811-7071 work with stock fuel injectors?
The 9-811-7071 is a fuel delivery upgrade and will work with any injector size. However, at the power levels this module supports, the factory BMW injectors will almost certainly be the limiting factor. High-output injectors sized appropriately for your target power level are recommended alongside this module.

Is the 9-811-7071 CARB legal?
No. The 9-811-7071 is not CARB legal and is not for sale or use in California per DeatschWerks product restrictions. It is intended for competition and off-road use where permitted.

Does the two-speed controller come included?
Yes. The 9-811-7071 includes the two-speed pump controller that automatically switches each DW810 pump between low-speed cruise mode and full-output wide-open-throttle mode. This extends pump lifespan and reduces electrical load during normal driving.

WARNING: This product can expose you to chemicals including Nickel compounds which are known to the State of California to cause cancer, and other chemicals which are known to cause birth defects or other reproductive harm. For more information visit www.P65Warnings.ca.gov.