Guide to Replacing Fuel Injectors on a 2011-2020 Ram 3500 6.7L Cummins
Everything you need to know about choosing the right new aftermarket fuel injectors for your Ram 3500.
- For 2019-2020 models, verify that the critical CP4 fuel pump recall (NHTSA 21V-880) has been performed before replacing injectors.
- Bosch is the OEM supplier; choosing new Bosch aftermarket injectors is the safest bet for stock reliability.
- New injectors must have their unique IQA codes programmed into the engine computer with a scan tool to run properly.
- Fuel contamination is the leading cause of injector failure; always use quality fuel and change filters regularly.
Is it time for new injectors?
A fuel injector won't last forever. Contaminated fuel, high mileage, and normal wear can cause them to fail. Ignoring a bad injector can lead to serious and expensive engine damage. Look for these common signs that one or more of your injectors may be failing.
Critical Issue for 2019-2020 Models: CP4 Fuel Pump Recall
If you own a 2019 or 2020 Ram 3500, be aware of NHTSA Recall 21V-880 (Ram code Y78). 🎬 Watch: Step-by-step guide for the Y78 fuel pump recall replacement. These model years used a Bosch CP4 high-pressure fuel pump that is prone to failure. When it fails, it sends metal shavings through the entire fuel system, destroying the fuel injectors, lines, and rail. This can cause the engine to stall unexpectedly. The recall involves replacing the pump and inspecting the rest of the fuel system for damage. If your truck is in this year range, verify with a dealer that this recall has been completed before replacing injectors.
Choosing the Right Aftermarket Fuel Injector
When shopping for new aftermarket injectors, you'll find a wide range of brands and prices. Not all are created equal. For a high-pressure system like the 6.7L Cummins, quality is critical. Cheap injectors can fail prematurely, damage your engine, and cost you more in the long run. Here’s a breakdown of the available brands to help you choose.
Tier 1: OEM Quality & Premium Performance
- Bosch: Bosch is the Original Equipment Manufacturer (OEM) for Cummins fuel injectors. Choosing a new Bosch aftermarket injector is the same as getting a part from the dealer. They are built to the exact factory specifications for performance, reliability, and longevity. This is the safest and most recommended choice for a stock replacement.
- BD Diesel: BD Diesel is a well-respected brand in the performance diesel market. They offer injectors that are built to meet or exceed OEM standards and often provide a slight increase in horsepower (e.g., 30hp over stock) without needing major modifications to the turbo or lift pump. These are a great option if you're looking for a bit more performance from a reliable brand.
Tier 2: Standard Aftermarket Replacements
- Delphi: Delphi is a major OEM supplier for many automotive parts and is a known name in fuel systems. While not the original supplier for this specific Ram application, their parts are generally considered to be of reliable quality for standard replacements.
- Standard Ignition (Standard Motor Products): SMP is a long-standing aftermarket brand that offers a wide variety of parts. Their injectors are typically seen as a direct, no-frills replacement for the original parts.
Tier 3: Budget-Focused Options
- Dorman: Dorman is known for providing a wide range of aftermarket parts at a budget-friendly price. While they offer a solution, for a critical component like a Cummins fuel injector, it's important to weigh the cost savings against potential risks in longevity and performance.
- Crown Automotive / GBR Fuel Injection: These brands fall into the budget category. For a component under such high stress, it is generally recommended by experienced owners and mechanics to invest in a higher-tier brand to avoid premature failure and potential engine damage.
| Tier | Brands | Best For |
|---|---|---|
| Tier 1: Premium | Bosch, BD Diesel | OEM-level reliability, stock replacement, or mild performance upgrades. |
| Tier 2: Standard | Delphi, Standard Ignition | Reliable, direct-fit replacements for daily driving. |
| Tier 3: Budget | Dorman, Crown, GBR | Lowest initial cost, but with potential trade-offs in longevity. |
Frequently Asked Questions (FAQ)
Can I replace just one bad fuel injector?
Yes, you can replace just one injector. However, it's important to remember that all injectors have the same amount of mileage and wear. If one has failed, others may not be far behind. For high-mileage trucks, replacing all six at once is often recommended to ensure balanced performance and avoid future labor costs.
Do new injectors need to be programmed?
Yes. For 2011-2020 Ram 3500 trucks, each new injector has a unique Injector Quantity Adjustment (IQA) code printed on it. This code must be programmed into the Engine Control Module (ECM) using a compatible scan tool. 🎬 Watch: How to program IQA codes using a scan tool. Failing to do this can result in a rough idle, poor performance, and increased emissions.
What is the main cause of fuel injector failure?
The number one cause of injector failure is fuel contamination. Dirt, debris, or water in the fuel can quickly damage the extremely precise internal components of the injector. Always use high-quality fuel and replace your fuel filters at recommended intervals to protect your injectors.
What is a core charge?
Many injectors are sold with a "core charge." This is a refundable deposit that you pay when you buy the part. You get the deposit back when you return your old, used injector to the seller. This allows the manufacturer to remanufacture the old part.
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Technical Specifications
OEM Part Numbers: 68027067AA 0445120193 0986435518 0445120050
This is a common-rail diesel fuel injector for the 6.7L Cummins engine. It operates under extremely high pressure (up to 26,000 PSI) and requires programming of its IQA code into the ECM upon installation.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Ram 3500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is it time for new injectors?
- Critical Issue for 2019-2020 Models: CP4 Fuel Pump Recall
- Choosing the Right Aftermarket Fuel Injector
- Tier 1: OEM Quality & Premium Performance
- Tier 2: Standard Aftermarket Replacements
- Tier 3: Budget-Focused Options
- Frequently Asked Questions (FAQ)
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