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Standard Ignition PR621 Fuel Injection Pressure Regulator
Fuel Pressure Control for Mazda 3
Standard Ignition PR621 is a new fuel injection pressure regulator for gas systems with direct mounting and a stainless steel construction. It is built for 2014-2018 Mazda 3 applications and includes the regulator, washer, and mounting hardware for a direct replacement service.
Use Standard Ignition PR621 when you need stable fuel pressure control on a 2014-2018 Mazda 3. The silver-finished steel regulator uses one inlet, one outlet, and a single port layout with no boost/vacuum reference port and no adjustable setting.
Key Features
- Part number PR621 fuel injection pressure regulator
- Fits 2014-2018 Mazda 3
- Direct mount design for straightforward replacement
- Stainless steel construction with silver finish
- Gas system regulator with one inlet, one outlet, and one port
- New component with included washer and hardware
- Non-adjustable design
Detailed Description
Standard Ignition PR621 is a fuel injection pressure regulator made for Mazda 3 models from 2014 through 2018. It is a direct-mount, new replacement part for gas fuel systems and is built with stainless steel and steel regulator materials for service in the fuel delivery system. The PR621 is configured without a boost or vacuum reference port and is intended for applications that call for a single-port regulator layout. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.
Common Issues It Can Address
- Fuel pressure that is not staying within the expected range
- Hard starting related to inconsistent fuel delivery
- Rough idle caused by pressure regulation problems
- Fuel system performance concerns on a Mazda 3
- Replacement needs for a worn or leaking regulator
Installation Notes and Tips
Confirm the vehicle is a 2014-2018 Mazda 3 before ordering. Match the direct-mount layout, port count, and gas system configuration to the original part. Replace the included washer during installation and verify all fuel connections are clean and properly seated before returning the vehicle to service.
Quality Assurance
Standard Ignition supplies this PR621 regulator as a new replacement component for fuel injection service. Its stainless steel construction and direct-fit design support consistent installation on the listed Mazda 3 applications.
| Brand | Standard Ignition |
|---|---|
| Part Number | PR621 |
| Adjustable | No |
| Automotive Performance Item | Yes |
| Boost/Vacuum Reference Port | No |
| Contents | Regulator |
| Functions | Regulator |
| Hardware Included | Yes |
| Inlet Quantity | 1 |
| Material | Stainless steel |
| Mounting Type | Direct |
| New or Reman | New |
| Notes | Includes washer |
| Number of outlets | 1 |
| Part Finish | Silver |
| Port Quantity | 1 |
| Reference Port Included | No |
| Regulator Finish | Silver |
| Regulator Material | Steel |
| System Type | Gas |
This part fits 5 vehicles. Search below:
| Year | Make | Model | Position | Notes |
|---|---|---|---|---|
| 2018 | Mazda | 3 | N/A | |
| 2017 | Mazda | 3 | N/A | |
| 2016 | Mazda | 3 | N/A | |
| 2015 | Mazda | 3 | N/A | |
| 2014 | Mazda | 3 | 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.