HomeAir and Fuel Delivery > Service KitsMahle GS33703 Fuel Injector Seal Kit
Part #: GS33703

Mahle GS33703 Fuel Injector Seal Kit

20 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$251.36Free Shipping
Free ShippingNo Cost to Continental U.S.
Free Returns*Wrong fit? No cost
60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
In Stock · Ready To Ship Most orders ship same-day if ordered before 1pm CST.
OE Direct Replacement — Bolt-on fit, no modifications needed
Fitment: Ford, F-250 Super Duty and F-350 Super Duty
Easy Returns — Return within 60 days for a full refund
Fast Shipping — Most orders ship same business day before 1pm CST

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.

BrandMahle
Part NumberGS33703
Additional Package ContentsContains 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-Rings8
Inside DiameterLine ID .115"
Item GradeOEM Standard
O-Ring MaterialMolded Rubber
Outside DiameterLine OD .250"
Overall LengthLine Length 5.25"
SizeFitting Size 17mm

This part fits 20 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2020FordF-250 Super Duty6.7LV8N/ASteel; Fuel Injector Seal Kit
2020FordF-350 Super Duty6.7LV8N/ASteel; Fuel Injector Seal Kit
2019FordF-250 Super Duty6.7LV8N/ASteel; Fuel Injector Seal Kit
2019FordF-350 Super Duty6.7LV8N/ASteel; Fuel Injector Seal Kit
2018FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2018FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2017FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2017FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2016FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2016FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2015FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2015FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2014FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2014FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2013FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2013FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2012FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2012FordF-350 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2011FordF-250 Super Duty6.7LV8N/A1 Kit Services the Left or Right Bank of Injectors; Steel
2011FordF-350 Super Duty6.7LV8N/A1 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:

BC3Z-9229-ABC3Z-9229-B

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.