5010889R91 Fuel Injector Kit – MaxxForce 7 Application
The 5010889R91 is a genuine-style fuel injector kit used on
International/Navistar MaxxForce 7 engines (post-2010 emissions era) and is commonly supplied as a
remanufactured piezo/common-rail unit. It’s engineered to deliver precise fuel metering and stable starts,
helping restore smooth idle, throttle response, and overall reliability on medium-duty trucks that run this platform.
Why This Injector
- Calibrated fuel delivery for consistent combustion and drivability
- Piezo/common-rail design tailored to MaxxForce 7 duty cycles
- OE-grade build to support emissions-era performance targets
- Service-ready kit designed to install with minimal downtime
Typical Use Cases
- International medium-duty trucks equipped with the MaxxForce 7
- Fleets refreshing injectors during top-end or fuel-system service
- Engines showing hard-start, rough idle, smoke under load, or poor fuel economy
Specs & Details
| Primary Part No. | 5010889R91 (Injector Kit) |
|---|---|
| Engine Platform | International/Navistar MaxxForce 7 (circa 2010–2014 piezo/common-rail) |
| Common Interchanges* | 1899239C92, 1899239C91, 1883111C92, 1883111C91 |
| Condition | Typically supplied new or remanufactured; verify listing |
| Notes | Confirm VIN/engine serial, emission year, and calibration before ordering |
*Cross references are provided for identification only. Always match your tag/calibration.
Fitment Guidance
This kit is specified for MaxxForce 7 applications, including many post-2010 engines.
Some sellers list compatible chassis like the International 4300, but always verify against your
engine serial, build year, and injector code to ensure a direct match.
Installation Tips
- Work clean—cap lines and ports; keep debris out of the rail and injector bores
- Replace seals/O-rings and torque high-pressure lines to spec; never reuse damaged lines
- Prime/bleed the fuel system and perform any required injector coding or ECM learn procedures
- After start, check for leaks and confirm balance rates within spec
Need help confirming fit? Contact our team with your VIN/ESN and photos of the old injector tag.