The DeatschWerks DW420 Series is a 420 LPH in-tank fuel pump supplied with a vehicle-specific install kit for the BMW E36 and E46 platforms. It mounts in the factory pump location and delivers the fuel volume required for high-horsepower and forced-induction builds. The kit adapts the universal pump body to the OE fuel module for a direct fit.
Specifications
| Type | In-tank high-flow fuel pump |
| Series | DW420 |
| Flow | 420 LPH |
| Mounting | In-tank |
| Includes | Vehicle-specific install kit |
| Fitment | BMW E36 / E46 325i 328i 330i M3 |
| Part Number | 9-421-1031 |
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 1992-1995 | BMW | 325i | Base |
| 1992-1995 | BMW | 325is | Base |
| 2000 | BMW | 328Ci | Base |
| 1996-2000 | BMW | 328i | Base |
| 1996-1999 | BMW | 328is | Base |
| 2001-2006 | BMW | 330Ci | Base |
| 2001-2005 | BMW | 330i | Base |
| 2001-2005 | BMW | 330xi | Base |
| 1995-1999 | BMW | M3 | Base |
| 2001-2006 | BMW | M3 | Base |
Shipping
- In-stock orders placed before 3 PM EST ship the same day — everything else ships within 24 hours.
- Standard, expedited, and overnight options at checkout.
- Oversized items ship by freight and take longer.
- Backordered items ship as soon as stock lands — contact us for lead times.
- International orders: prices do not include VAT, duties, or import fees. Your country charges these at import and they are the buyer’s responsibility.
Returns
- 30-day returns on new, uninstalled items in original packaging with all hardware.
- Standard returns: 8% restocking fee, buyer pays return shipping. Both waived if the item is defective or we made the error.
- Installed or used parts can’t be returned — confirm fitment before you install.
- Special orders and custom items are final sale.
- Email us for return authorization before shipping anything back.
Full details: Shipping Policy · Refund Policy
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