OE Quality
60-Day Returns

Mahle GS33703 Fuel Injector Seal Kit
Mahle Fuel Injector Seal Kit for Ford Super Duty
Restore sealing performance in the fuel system with the Mahle Fuel Injector Seal Kit, part number GS33703. Built to OEM standard and backed by Mahle’s sealing expertise, this kit is made for Ford F-250 Super Duty and Ford F-350 Super Duty diesel applications that need precise injector sealing service.
Key Features
- OEM-standard fuel injector seal kit for service work on Ford Super Duty diesel engines
- Includes fuel injector supply tubes, body O-rings, crush washers, return port O-rings, and hold down bolts
- Molded rubber O-rings for sealing consistency
- 17 mm fitting size with line ID .115 in., line OD .250 in., and line length 5.25 in.
- Mahle GS33703 is engineered for injector sealing service on steel fuel system applications
- Cross-reference: Ford BC3Z-9229-A, BC3Z-9229-B
Detailed Description
The Mahle Fuel Injector Seal Kit GS33703 is a service kit for maintaining proper injector sealing on 2011-2020 Ford F-250 Super Duty and Ford F-350 Super Duty models. Mahle gaskets and sealing components are used by OEMs and technicians worldwide, and this kit follows that same OE-standard approach for fuel injector service. It is a practical choice when servicing the left or right bank on 2011-2018 trucks or the injector sealing system on 2019-2020 trucks.
For buyers searching for a Ford F-250 Super Duty fuel injector seal kit, Ford F-350 Super Duty injector seal replacement, or Mahle GS33703 fuel injector service parts, this kit provides the sealing components needed for injector-related maintenance on the listed Super Duty applications.
What It Helps Address
- Fuel seepage around injector sealing points
- Hard starting caused by injector seal leakage
- Diesel fuel odor from worn injector seals or O-rings
- Loss of fuel system sealing after injector service
- Maintenance needs on Ford Super Duty injector banks
Installation Notes and Tips
Confirm engine and application details before installation. Clean all sealing surfaces thoroughly, inspect injector bores and related components for wear, and replace damaged seals or washers during service. Follow the vehicle service procedure for torque sequence and injector bank installation on Ford F-250 Super Duty and Ford F-350 Super Duty models.
Quality Assurance
Mahle supplies sealing products used in OEM and technician service environments, and GS33703 is built to OEM standard specifications for dependable fuel injector sealing performance.
| Brand | Mahle |
|---|---|
| Part Number | GS33703 |
| Additional Package Contents | Contains Fuel Injector Supply Tubes, Fuel Injector Body O-Rings, Fuel Injector Crush Washers, Fuel Injector Return Port O-Rings, Fuel Injector Hold Down Bolts |
| Fuel Injector O-Rings | 8 |
| Inside Diameter | Line ID .115" |
| Item Grade | OEM Standard |
| O-Ring Material | Molded Rubber |
| Outside Diameter | Line OD .250" |
| Overall Length | Line Length 5.25" |
| Size | Fitting Size 17mm |
This part fits 20 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 2020 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | Steel; Fuel Injector Seal Kit |
| 2020 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | Steel; Fuel Injector Seal Kit |
| 2019 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | Steel; Fuel Injector Seal Kit |
| 2019 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | Steel; Fuel Injector Seal Kit |
| 2018 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2018 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2017 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2017 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2016 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2016 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2015 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2015 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2014 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2014 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2013 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2013 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2012 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2012 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2011 | Ford | F-250 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
| 2011 | Ford | F-350 Super Duty | 6.7L | V8 | N/A | 1 Kit Services the Left or Right Bank of Injectors; Steel |
* 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.