OE Quality
60-Day Returns

Standard Ignition GDP503 Direct Injection High Pressure Fuel Pump
Overview of Standard Ignition GDP503 Fuel Pump
The Standard Ignition GDP503 is a direct injection high pressure fuel pump designed specifically for select Lexus models. Engineered to meet original equipment manufacturer (OEM) specifications, this mechanical fuel pump ensures reliable fuel delivery for Lexus GS460, IS F, LS460, and LS600h vehicles.
- Mechanical direct injection high pressure fuel pump
- Oval connector shape with 2 blade terminals
- Includes mounting gasket and seals for installation
- Compatible with gasoline fuel delivery systems
- OEM replacement part for Lexus GS460, IS F, LS460, LS600h
Product Details and Specifications
The GDP503 fuel pump from Standard Ignition is designed for direct fuel injection (GDI) systems, providing precise fuel delivery under high pressure. It features a mechanical operation type with an oval-shaped connector and two blade terminals, ensuring secure electrical connections. This pump is not submersible and is intended for direct system types. The package includes necessary gaskets and seals to facilitate proper mounting and prevent leaks. This part is a direct OEM replacement, maintaining factory performance standards for Lexus GS460, IS F, LS460, and LS600h models.
Compatible Lexus Models and Applications
This direct injection high pressure fuel pump is compatible with the following Lexus vehicles:
- Lexus GS460
- Lexus IS F
- Lexus LS460
- Lexus LS600h
Using the Standard Ignition GDP503 ensures proper fuel delivery and system functionality for these specific models equipped with gasoline direct injection systems.
Common Issues Addressed by GDP503 Fuel Pump
- Inconsistent fuel pressure causing engine performance issues
- Fuel pump failure leading to engine stalling or no start conditions
- Leaks due to worn or missing mounting gaskets and seals
- Poor fuel delivery affecting acceleration and fuel efficiency
- Electrical connection problems from damaged terminals or connectors
Installation Notes and Tips
Installation of the Standard Ignition GDP503 requires attention to the included mounting gasket and seals to ensure a proper seal and prevent fuel leaks. The oval connector with two blade terminals should be securely connected to maintain electrical integrity. This pump is designed as a direct OEM replacement, so it fits the original mounting points on compatible Lexus models. It is recommended to verify compatibility with your vehicle’s VIN and consult a professional technician for installation to ensure safety and proper operation.
Quality Assurance and Warranty
Standard Ignition parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The GDP503 fuel pump includes all necessary hardware for installation and is backed by Standard Ignition’s quality assurance processes. Warranty coverage details should be confirmed at the time of purchase, typically covering defects in materials and workmanship under normal use.
| Brand | Standard Ignition |
| Part Number | GDP503 |
| Connector Shape | Oval |
| Fuel Injection Type | GDI |
| Fuel Type | Gas |
| Notes | Includes Mounting Gasket |
| O.E.M. Replacement | Yes |
| System Type | Direct |
| Terminal Type | Blade |
This part fits 27 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2016 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2015 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2015 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2014 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2014 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2014 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2013 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2013 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2013 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2012 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2012 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2012 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2011 | Lexus | GS460 | 4.6L | V8 | N/A | |
| 2011 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2011 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2011 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2010 | Lexus | GS460 | 4.6L | V8 | N/A | |
| 2010 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2010 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2010 | Lexus | LS600h | 5.0L | V8 | N/A | |
| 2009 | Lexus | GS460 | 4.6L | V8 | N/A | |
| 2009 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2009 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2008 | Lexus | GS460 | 4.6L | V8 | N/A | |
| 2008 | Lexus | IS F | 5.0L | V8 | N/A | |
| 2008 | Lexus | LS460 | 4.6L | V8 | N/A | |
| 2007 | Lexus | LS460 | 4.6L | V8 | N/A |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.