Cummins 4955080 XPI Fuel Injector | High-Pressure Common Rail, Bench Tested & 12-Month Warranty

When a heavy-duty Cummins engine develops rough idle, excessive smoke, poor acceleration, hard starting or injector-related fault codes, the injector is one of the first components I ask our customers to verify.

The Cummins 4955080 XPI fuel injector is a high-pressure common rail injector reference used across selected Cummins ISX15/XPI applications. Because XPI injector part numbers and replacement numbers can vary by engine configuration, CPL, ECM generation and calibration, I do not recommend choosing an injector from the engine model alone.

Before we ship an injector, our technical team checks the original injector number, engine model, ESN, CPL and application information whenever these details are available. This helps overseas repair shops avoid one of the most expensive mistakes in diesel repair: installing a physically similar injector that does not match the engine's fuel-system calibration.

Cummins describes the XPI system as a high-pressure common rail system designed to deliver precise fuel quantities at very high injection pressures and support multiple injection events per cycle. The ISX15 was offered with XPI fuel-system technology, including the EPA 2010 generation.

Product Overview

Important fitment note: 4955080 appears in different supplier catalogs as a reference/casting number associated with several XPI injector part numbers. For example, current heavy-truck parts listings associate 4955080 with 4384365PX, while other injector catalogs associate it with 2897320 or 2872405. For this reason, we verify the original injector number and engine configuration before confirming compatibility.

Why We Supply 4955080 XPI Injectors to Diesel Repair Shops

I work with overseas diesel repair shops, fleet maintenance companies and diesel parts distributors, and I know the problem is usually not simply finding an injector.

The real problem is finding an injector that:

• matches the correct XPI fuel system;

• matches the engine configuration;

• has stable electrical characteristics;

• has acceptable fuel-flow and leakage performance;

• can be correctly calibrated or coded where required;

• arrives quickly enough to keep the truck or machine out of the workshop.

For this reason, our approach is based on part-number verification + bench testing + application confirmation, rather than simply selling an injector based on the engine model.

If you send us the original injector number, engine ESN, CPL or a clear photo of the original injector label, our engineers can help you identify the appropriate replacement option before you place a bulk order.

1. XPI High-Pressure Common Rail Technology

The Cummins XPI system is a high-pressure common rail fuel system developed for demanding diesel applications.

Cummins describes its Heavy-Duty XPI system as a common rail system providing industry-leading injection pressure, with a large volume of pressurized fuel available at the injector to support multiple injection events and optimized combustion. Cummins lists a system pressure rating of up to 2600 bar for its Heavy-Duty XPI platform.

The ISX15 is one of the Cummins engines that uses XPI fuel-system technology. Cummins states that its XPI fuel system provides precise fuel delivery at ultra-high pressure and enables multiple injection events per engine cycle.

For a repair shop, this matters because injector performance is directly related to:

• fuel metering;

• injection timing;

• atomization;

• combustion stability;

• cylinder balance;

• engine response;

• fuel consumption;

• exhaust emissions.

When an XPI injector becomes worn or its internal control characteristics change, replacing it with the correct specification is much more reliable than attempting to compensate for the problem through other engine adjustments.

2. 4955080 Injector: What We Recommend You Verify Before Ordering

I strongly recommend that repair shops do not identify this injector by “ISX15” alone.

For accurate matching, send us as many of the following details as possible:

Original Injector Information

• Original injector part number

• Injector reference or casting number

• Injector calibration/trim information

• Original replacement number

• Clear photos of the injector label

Engine Information

• Engine model

• ESN — Engine Serial Number

• CPL — Control Parts List

• ECM model

• Engine emission generation

• Vehicle or machine application

This is particularly important because the same XPI injector family can appear under different replacement, remanufacturing or reference numbers.

For example, current industry catalogs associate 4955080 with several XPI injector numbers, including 2872405, 2894920, 2897320 and 4327147, depending on the application and catalog system.

My recommendation to every workshop: if you are replacing only one failed injector, compare the original injector number before ordering. If you are replacing a complete set, send us the engine information so we can verify the complete injector specification.

3. Bench Testing Before Shipment

A fuel injector may look perfect externally and still have a problem internally.

This is why we treat bench testing as an important part of our quality-control process.

Depending on the product specification and available test equipment, our technicians inspect parameters such as:

• electrical solenoid response;

• injector leakage;

• fuel delivery;

• injection performance;

• control response;

• abnormal operating behavior;

• overall injector condition.

For remanufactured units, we also pay particular attention to internal wear, sealing condition and component replacement before final calibration.

Our goal is simple:

The injector should arrive at your workshop as a tested component, not as an unverified core that you still have to troubleshoot yourself.

Professional injector testing is especially important for XPI systems because a small deviation in fuel delivery or control response can affect cylinder balance and engine performance.

4. Calibration and Injector Coding

One of the questions we receive most often from repair shops is:

“Do I need to program the injector after installation?”

The correct answer depends on the specific engine and injector configuration.

Some XPI applications use individual injector calibration or trim information that must be entered into the ECM using the appropriate diagnostic equipment.

Therefore, when we supply an injector, we recommend that the technician:

1. Confirm the injector part number.

2. Record the calibration/trim information supplied with the injector.

3. Install the injector according to the engine manufacturer's service procedure.

4. Enter the required calibration information into the ECM when applicable.

5. Clear relevant fault codes.

6. Run the appropriate engine diagnostic and balance checks.

7. Check for fuel leakage and abnormal engine operation.

Do not assume that every injector can simply be installed without calibration verification.

5. Common Symptoms of a Failing XPI Injector

When a Cummins ISX/XPI engine develops a fuel-system problem, the injector may be one possible cause.

Typical symptoms that can justify injector testing include:

Hard Starting

An injector with excessive leakage or incorrect fuel delivery can contribute to difficult starting, particularly when the engine is hot or cold.

Rough or Unstable Idle

Uneven fuel delivery between cylinders can cause noticeable vibration or unstable idle speed.

Reduced Engine Power

Incorrect injection quantity or poor atomization can affect combustion efficiency and engine response.

Excessive Smoke

Poor injector performance may contribute to incomplete combustion and increased exhaust smoke.

Increased Fuel Consumption

If fuel delivery is no longer properly controlled, fuel economy can deteriorate.

Injector-Related Fault Codes

The ECM may detect abnormal injector electrical or cylinder-balance behavior and store diagnostic fault codes.

However, I do not recommend replacing the injector based on symptoms alone.

A professional diagnosis should also consider:

• fuel pressure;

• fuel filter condition;

• high-pressure pump performance;

• fuel contamination;

• injector wiring;

• connector condition;

• rail pressure;

• ECM data;

• cylinder compression;

• air-handling problems.

An injector fault code does not automatically mean the injector itself is the only failed component.

That is one reason we encourage repair shops to send us the diagnostic information before ordering multiple injectors.

6. Fuel Contamination and Injector Life

XPI injectors operate under extremely demanding fuel-system conditions.

In our experience, contamination is one of the most important factors to control during injector replacement.

Before installing a new or remanufactured injector, I recommend checking:

• fuel filter condition;

• fuel cleanliness;

• metal particles in the fuel system;

• high-pressure pump condition;

• fuel rail condition;

• injector connector and fuel-line cleanliness.

If metal debris is present in the fuel system, simply replacing one injector may not solve the original problem.

The contamination source must be identified first.

Otherwise, a replacement injector can be damaged again shortly after installation.

7. Correct Installation Matters

A high-quality injector can still fail prematurely if installation procedures are not followed.

For workshop installation, we recommend:

• use the correct injector sealing components;

• clean the injector bore carefully;

• keep fuel-system components clean;

• replace seals and washers where required;

• inspect the injector connector;

• inspect the high-pressure fuel connection;

• follow the correct torque specifications;

• perform the required ECM calibration;

• check for fuel leakage after installation;

• perform a complete engine diagnostic after installation.

Do not reuse damaged sealing components or install an injector into a contaminated fuel system.

For exact torque values and installation procedures, always follow the applicable Cummins service documentation for the specific engine configuration.

8. New and Remanufactured Options

We supply different quality levels according to customer requirements and budget.

New Injector

Suitable for customers who require a new injector for workshop repair or fleet maintenance.

New Aftermarket Injector

A cost-effective option for distributors and repair shops looking for competitive replacement parts.

Remanufactured Injector

Suitable for customers who need a lower-cost solution while maintaining controlled testing and calibration requirements.

For remanufactured products, we recommend confirming the exact remanufacturing specification, test report and replacement number before purchase.

We do not recommend describing every aftermarket or remanufactured injector as “genuine OEM” or “original Cummins.” On our website, we clearly separate genuine, OEM, aftermarket and remanufactured products according to the actual product source.

This makes our product information more transparent for overseas buyers.

9. 4955080 Cross-Reference and Related XPI Numbers

The number 4955080 is used in multiple industry catalogs as a reference associated with Cummins XPI injectors.

Depending on the engine configuration and catalog source, related numbers may include:

• 2872405

• 2894920

• 2897320

• 4327147

• 4384365

• 5579419

• 5579421

• 4955080

However, these numbers should not automatically be treated as universal one-to-one replacements.

For example, current listings show 4955080 associated with 4384365PX as a casting/reference number, while other technical catalogs associate 4955080 with 2872405 or 2897320.

Please send us your original part number or ESN before ordering.

This is the safest way to avoid a wrong injector shipment.

10. Selected Cummins XPI Injector Applications

Our Cummins XPI injector range covers multiple heavy-duty engine generations and part-number configurations.

Typical application areas include:

• Heavy-duty highway trucks

• Long-haul tractor units

• Vocational trucks

• Construction machinery

• Mining equipment

• Industrial diesel engines

• Generator applications

• Fleet maintenance

• Diesel repair workshops

• Engine rebuilding centers

• Diesel parts distributors

The exact application depends on the injector part number, engine configuration, CPL, ECM generation and calibration.

Cummins itself lists XPI technology across heavy-duty applications, while specific engine generations and emission configurations must be checked individually.

11. Our B2B Supply Service for Diesel Repair Shops

We are not only selling individual injectors.

Our main customers are:

• diesel repair shops;

• heavy-truck repair garages;

• fleet maintenance companies;

• engine rebuilding workshops;

• construction machinery service companies;

• generator service centers;

• diesel parts wholesalers;

• regional distributors.

For these customers, we provide:

Part Number Matching

Send us the original injector number, ESN or engine information and our technical team will help confirm the appropriate option.

Mixed Part Numbers

For wholesalers, different injector part numbers can be combined in one order according to our current MOQ policy.

Bulk Supply

We support repeat orders and wholesale quantities for distributors and repair networks.

Neutral Export Packaging

We can provide neutral packaging for overseas distributors who prefer to sell under their own local brand.

Fast Stock Delivery

For stocked items, our normal target is shipment within 3–7 working days, subject to order quantity and destination.

Technical Support

We help customers confirm injector numbers, engine applications, calibration requirements and replacement options before shipment.

12. Why Overseas Workshops Work With Us

From an engineer's perspective, the biggest value we provide is not simply a lower price.

It is reducing the risk of:

wrong part → wrong installation → repeated repair → truck downtime → customer complaint.

Our workflow is therefore:

Part Number Confirmation → Application Verification → Product Selection → Bench Testing → Packing → Shipment → Technical Support

For regular B2B customers, we can also build a part-number list based on your most frequently repaired Cummins engines.

This makes repeat purchasing much faster.

13. Our Quality-Control Process

Before delivery, our production and technical teams follow a controlled inspection process.

Step 1 — Incoming Component Inspection

We check the physical condition and relevant component information.

Step 2 — Assembly / Remanufacturing

For remanufactured units, qualified components are inspected, cleaned and assembled according to the applicable process.

Step 3 — Electrical Inspection

The injector solenoid and electrical response are checked.

Step 4 — Fuel-System Bench Testing

The injector is tested using the applicable XPI test equipment.

Step 5 — Leakage and Performance Inspection

Abnormal leakage and performance deviations are identified before shipment.

Step 6 — Calibration / Identification

Applicable calibration or identification information is recorded.

Step 7 — Final Inspection

The injector is visually inspected, packaged and prepared for export.

This process helps us provide repair shops with a more consistent product instead of relying only on an external appearance inspection.

14. 12-Month Warranty and After-Sales Support

We provide a 12-month warranty for applicable products according to our sales terms.

Our warranty support is designed for B2B customers and includes technical communication when a product-related issue is reported.

For warranty claims, we normally ask for:

• purchase information;

• injector part number;

• installation information;

• engine ESN/CPL where available;

• diagnostic fault codes;

• photos or videos when useful;

• test results from the workshop.

We recommend that customers diagnose the complete fuel system before replacing multiple components.

15. Frequently Asked Questions

Q1. Can 4955080 fit my Cummins ISX15 directly?

Not every ISX15 engine uses the same injector configuration.

Please send us your original injector number, ESN, CPL or a clear photo of the injector. We will verify the application before confirming the order.

Q2. Is 4955080 the OEM service part number?

4955080 appears in different industry catalogs as an injector reference/casting number associated with several Cummins XPI injector numbers. It should therefore not automatically be treated as a universal OEM service part number.

Q3. What injector numbers are associated with 4955080?

Depending on the application and catalog source, numbers associated with 4955080 include 2872405, 2894920, 2897320, 4327147 and 4384365-related XPI variants. Exact interchangeability must be verified by application.

Q4. Does the injector require coding?

Some XPI applications require injector calibration or trim information to be entered into the ECM after installation. The requirement depends on the engine configuration.

Q5. Do you offer new and remanufactured injectors?

Yes. We can supply new and remanufactured options depending on the part number and current stock.

Q6. Do you provide bench testing?

Yes. Our applicable injector products are checked on dedicated test equipment before shipment according to the product specification.

Q7. What is your warranty?

Our standard warranty for applicable injectors is 12 months, subject to our warranty terms.

Q8. What is your delivery time?

For stocked products, our normal target is 3–7 working days for shipment. Actual transit time depends on destination and logistics method.

Q9. Can I mix different injector part numbers in one order?

Yes. We support mixed part-number orders for qualified B2B customers, subject to the applicable MOQ.

Q10. Can you supply other Cummins fuel-system parts?

Yes. Our product range includes XPI fuel injectors, common rail injectors, high-pressure fuel pumps, engine ECUs and related diesel fuel-system components.

16. Related Cummins XPI Injector Products

Below are selected products from our Cummins XPI injector range.

Cummins 2419679 XPI Injector | 2400-Bar Class, 8-Hole Design & Bench Tested

Part Number: 2419679
Reference Numbers: 2419678, 4954810
Application: Selected ISX12 / ISX15 applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + technical support

This injector is suitable for selected heavy-duty applications where the original injector number and engine configuration match.

Cummins 2872405 XPI Injector | 2500-Bar Class, 8-Hole Design & Heavy-Duty Performance

Part Number: 2872405
Reference Numbers: 2872404, 4955081
Application: Selected ISX15 / QSX15 / related XPI applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + bulk B2B support

2872405 is one of the XPI injector numbers commonly associated with Cummins ISX15 applications in industry catalogs. Exact fitment should be verified by CPL and ESN.

Cummins 2894920 XPI Injector | 2500-Bar Class, 8-Hole Nozzle & Tested Supply

Part Number: 2894920
Reference Numbers: 2894919, 4955082
Application: Selected ISX15 CM2250 applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + application support

This injector number is listed in industry injector catalogs for selected ISX15 applications. We recommend confirming the CPL before shipment.

Cummins 2897320 XPI Injector | 8-Hole Design, ISX15 Fitment & Calibration Support

Part Number: 2897320
Reference Numbers: 2897319, 4955083
Application: Selected ISX15 / XPI applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + calibration guidance

Industry technical files associate 2897320 with the XPI system and with reference number 4955080, while other catalogs associate it with 5579419. This is another example of why we recommend confirming the original injector number before ordering.

Cummins 4327147 XPI Injector | 2600-Bar-Class System, 8-Hole Design & Heavy-Duty Supply

Part Number: 4327147
Reference Numbers: 4327146 and related XPI variants
Application: Selected X15 / ISX15 applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + B2B technical support

Current diesel injector suppliers associate 4327147 with 4955080 and selected X15 applications, but exact fitment still depends on the engine configuration and calibration.

Cummins 4955080 XPI Injector | ISX15 Reference, 8-Hole Design & 12-Month Warranty

Reference Number: 4955080
Fuel System: XPI High-Pressure Common Rail
Application: Selected Cummins ISX15/XPI applications
Injector Type: Electronic solenoid injector
Nozzle: Commonly listed in 8-hole XPI configurations
Quality: New / Remanufactured options
Warranty: 12 months
Supply: Factory-direct B2B supply

4955080 is the main search/reference number for this product page. Because current industry sources use this number in different ways, including as a casting/reference number, we verify the customer's original injector number before confirming the exact replacement.

Cummins 5579419 XPI Injector | 2500-Bar-Class, ISX15/X15 Applications & Tested Quality

Part Number: 5579419
Reference Numbers: 5579418, 4955086
Application: Selected ISX15 / X15 CM2350-series applications
Fuel System: XPI Common Rail
Injector Type: Electronic high-pressure injector
Nozzle: 8-hole configuration
Quality: New / Remanufactured options
Service: 12-month warranty + global B2B support

5579419 is associated with selected ISX15/X15 XPI applications in current industry catalogs. Exact application should be checked against the engine serial number and injector identification.

17. What I Need From You to Confirm the Correct Injector

If you are a repair shop and are not sure which injector you need, you do not have to guess.

Send us:

1. Original injector part number
2. Engine model
3. ESN
4. CPL
5. Vehicle model or application
6. Photo of the original injector label, if available

Our engineers will check the information and recommend the closest matching injector specification.

This is especially important when dealing with 4955080, 2872405, 2894920, 2897320, 4327147, 4384365 and 5579419, because these numbers can appear as replacement, reference, casting or remanufacturing numbers in different catalogs.