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Bosch 66857 Direct Injection High Pressure Fuel Pump
| Brand | Bosch 66857 |
|---|---|
| Inlet Outside Diameter | 14 |
| Outlet Outside Diameter | 14 |
| Fuel Type | Gas |
| Terminal Type | Blade |
| Mounting Hardware Included | No |
| Connector Shape | Square/rectangle |
| Gasket Or Seal Included | No |
| Connector Gender | Female |
| Terminal Gender | Male |
| Wiring Harness Included | No |
| Outlet Type | Compression |
| Outlet Quantity | 1 |
| In Tank or External | External |
| Electrical | Yes |
| Mounting Type | Bolt on |
| Filter Included | Yes |
| Pump Type | Electric |
| Automotive Item Weight (lbs) | 1.66449 lb |
| Connector Quantity | 1 |
| Fuel Delivery Type | Fuel injection |
| Fuel Filter Included | Yes |
| Fuel Sending Unit Included | No |
| Fuel Tank Pressure Sensor Included | No |
| Fuel Type (Fuel Pump) | Gas |
| Gasket Or Seal Included | Yes |
| Gasket Or Seal Material | Synthetic or nbr rubber |
| Grade Type (Premium) | Premium |
| Hose Length (Fuel Pump) | 0 ft |
| Housing Material | Metal |
| Housing Width | 51 mm |
| Product line | GDI High Pressure Pump |
| Fits | Porsche · 9 vehicles |
OE-quality build. Produced and tested to Bosch OE fuel pump standards for reliable service life.
Bolt-on installation. Mounting type and external in-line design simplify replacement.
Premium fuel pump. Built for gasoline fuel injection with a metal housing and steel construction.
Cross-references 9A211031502 for the same application. See all 1.
Bosch GDI High Pressure Pump 66857
Bosch 66857 is a direct injection high pressure fuel pump for gasoline applications, built for precise fuel delivery in compatible Porsche GDI systems. It is an external, electric in-line pump with a metal housing, bolt-on mounting, and a square/rectangle female connector for a straightforward replacement on the listed vehicles.
Key Features
- Direct injection high pressure fuel pump for gas engines
- External, in-line electric pump with bolt-on mounting
- Metal housing with premium-grade construction
- Fuel filter and gasket/seal included
- Single outlet design with compression outlet type
- Female connector with blade terminals
- Quick-connect inlet and M16 x 1.5 outlet fitting
- Compatible with Porsche 718 Boxster, 718 Cayman, and 911 applications
Product Details
This Bosch GDI High Pressure Pump is engineered for fuel injection systems that require stable high-pressure gasoline delivery. Bosch builds aftermarket fuel pumps on the same production lines and to the same quality standards used for Bosch OE fuel pumps, helping maintain consistent operation in demanding direct-injection service. Part number 66857 is listed for 2017-2019 Porsche 718 Boxster, 2017-2019 Porsche 718 Cayman, and 2017-2019 Porsche 911 applications. This part cross-references 9A211031502 for the same application.
Common Issues This Pump Can Address
- Hard starting caused by insufficient high-pressure fuel delivery
- Fuel pressure loss in direct injection systems
- Engine hesitation or stumble under load
- Fuel delivery faults related to a worn high pressure pump
- Driveability problems tied to inconsistent gasoline injection pressure
Installation Notes and Tips
Verify the inlet and outlet sizes, connector style, and outlet fitting before installation. This pump uses an external, bolt-on mounting design with a quick-connect inlet and compression outlet, so matching the original fuel line and electrical connection is important. Replace the included gasket/seal during service and inspect the fuel system for contamination before putting the vehicle back into operation. Fits 2017-2019 Porsche 718 Boxster, N/A. Fits 2017-2019 Porsche 718 Cayman, N/A. Fits 2017-2019 Porsche 911, N/A.
Quality Assurance
Bosch manufactures this pump to OE-level production and testing standards for long service life in automotive fuel injection systems. The Bosch GDI High Pressure Pump line is built for consistent fit and dependable fuel delivery in the listed Porsche applications.
| Year | Make | Model | Liters | Cylinders | Notes |
|---|---|---|---|---|---|
| 2019 | Porsche | 718 Boxster | 2.0L | H4 | GDI High Pressure Pump |
| 2019 | Porsche | 718 Cayman | 2.0L | H4 | GDI High Pressure Pump |
| 2019 | Porsche | 911 | 3.0L | H6 | GDI High Pressure Pump |
| 2018 | Porsche | 718 Boxster | 2.0L | H4 | GDI High Pressure Pump |
| 2018 | Porsche | 718 Cayman | 2.0L | H4 | GDI High Pressure Pump |
| 2018 | Porsche | 911 | 3.0L | H6 | GDI High Pressure Pump |
| 2017 | Porsche | 718 Boxster | 2.0L | H4 | GDI High Pressure Pump |
| 2017 | Porsche | 718 Cayman | 2.0L | H4 | GDI High Pressure Pump |
| 2017 | Porsche | 911 | 3.0L | H6 | GDI High Pressure Pump |
| No rows match your filter. | |||||