Here Are the Dodge Cummins Years to Avoid and Problems

Patrick Oziegbe
Updated On:

Dodge Cummins engines have been the heart of Dodge Ram pickups since 1989, delivering legendary performance and durability. However, even the best engines can have their off years.

In this article, we’ll discuss the years that are best to avoid when shopping for a Dodge Cummins-powered truck.

With a few key pointers, you’ll be able to make an informed decision and choose the right model for your needs.

Keep reading to find out which years may not be the most reliable for a Dodge Cummins engine.

Dodge Cummins Years to Avoid

Years to Avoid


First, you should avoid the 1992 Dodge Cummins model year. This year experienced issues with low reliability and discomfort for drivers.

1999 and 2001

Another year to steer clear of is 1999. Both the 1999 and 2001 Dodge Cummins suffered from engine and transmission problems, which could lead to expensive repairs down the road.

2003, 2004 and 2006

The 2003 and 2004 models didn’t fare much better, with noticeable engine and electrical issues. If you’re considering a mid-2000s model, be wary of the 2006 Dodge Cummins as well, as it also suffered from a variety of major mechanical problems.

2008 and 2011

While the 2008 and 2011 Dodge Cummins models showed some improvement, they are still years to avoid if possible. Issues persisted with the engine and transmission in these years, making them less reliable compared to other model years.

2014 and 2015

Finally, the 2014 and 2015 Dodge Cummins saw a high number of complaints from owners about reliability concerns, so it’s best to be cautious if you come across these years while shopping for your next truck.

It’s worth noting that more recent models, like the 2017, 2018, 2019, and 2020 Dodge Cummins have shown improvements in reliability and overall performance.

By considering these years to avoid, you can increase your chances of finding a Dodge Cummins that will serve you well for years to come.

Common Dodge Cummins Problems

Engine Issues

The Dodge Cummins has experienced several engine problems over the years. One common issue you may encounter is a failing injector, leading to poor performance and decreased fuel economy.

Another problem is the turbocharger, which might fail and require replacement.

Your diesel-powered Dodge Cummins may also experience some overheating issues, particularly if the engine is under heavy stress from towing or hauling heavy loads.

Be sure to monitor the temperature gauge and address any overheating problems promptly before they become more serious.

Transmission Failure

One thing you might notice is transmission failure, particularly with manual transmissions. It is crucial to maintain your transmission and be prepared to address common problems like gear slipping and difficulty shifting.

Stay aware of any symptoms indicating potential transmission issues to prevent more significant damage or costly repairs.

Suspension and Steering Issues

Suspension and steering issues are also fairly common with Dodge Cummins trucks. One of the most dreaded problems is the “death wobble” – a severe steering vibration that can occur when driving at high speeds.

Additionally, you may notice suspension problems resulting from hauling or towing heavy loads frequently.

Keep an eye on any potential damage to the suspension system, such as worn-out shocks or bushings, to ensure your truck remains comfortable and safe to drive.

Body and Interior Problems

Lastly, Dodge Cummins owners should be aware of body and interior problems, especially in terms of durability and design.

Cracking in the dashboard, faulty door locks, and charging system issues are all potential concerns.

Make sure to pay attention to the interior items like the infotainment system and air injection systems, as they may require maintenance or repair as well.

Your truck’s overall comfort and functionality depend on the state of the body and interior, so address these issues as they arise to keep your Dodge Cummins in top shape.

The Best Year Dodge Cummins to Buy?

Some of the standout years include 2004, 2008, 2011, 2014, and 2019.

These years generally have fewer issues and offer improved performance compared to their counterparts.

The 1989 model marks the beginning of the Cummins B-series engines in Dodge Ram 2500 and 3500 trucks. This year showcased a reliable and durable diesel engine that set the stage for future models.

Between 2003 and 2009, Dodge Cummins diesel engines were known for marked improvements and reduced issues.

From 2010 to 2018, the Cummins engines continued to develop, providing better performance and even fewer problems for drivers.

As you narrow down your search, be sure to keep these key years in mind to give you a smoother and more enjoyable ride with your Dodge Cummins.

Focusing on these top years increases the chances of getting a reliable and powerful engine that will keep you going for years to come.

6.7 Cummins Years To Avoid

Although no engine is perfect, some years of the 6.7 Cummins engines have reported more issues than others. To help you make informed decisions, here’s a brief discussion on the years to avoid and why.


This year experienced issues with the Diesel Particulate Filter (DPF) clogging, causing poor engine performance and costly repairs. Proper maintenance can mitigate the problem, but it’s best to steer clear of this year if you can.


Due to a recall, this year should be avoided. Additionally, issues with turbochargers have been reported, leading to potential engine damage.

2014 and 2015

These years also faced DPF clog issues and problematic turbochargers. Although some problems may be manageable with regular maintenance and repairs, it’s still a wise decision to avoid these years when considering purchasing a Cummins engine.

By being cautious and keeping these years in mind, you’ll be setting yourself up for a better experience with your 6.7 Cummins engine. Good luck in making your choice, and may your engine be both powerful and reliable!

6.7 Cummins Common Problems

As a 6.7 Cummins engine owner, you may encounter a few common problems. Let’s discuss them briefly to help you stay informed.

Turbocharger Failure: Your engine may face turbocharger failure, which affects performance and fuel economy. Worst-case scenario, your engine could stall or even catch fire.

Overheating and Head Gasket Problems: Overheating can lead to head gasket failures, which cause coolant leaks and reduced engine performance. Keeping an eye on your engine temperature ensures your engine’s longevity.

Injector Issues: Faulty injectors may decrease your engine’s efficiency, leading to increased fuel consumption, rough idling, and stalling. It is crucial to maintain your injectors to avoid these issues.

EGR Cooler Problems: A cracked EGR cooler may lead to coolant loss and engine damage. Be sure to inspect and service your EGR components periodically.

Fuel System: Problems in the fuel system, such as contaminated fuel or a malfunctioning fuel pump, can affect the overall performance of your 6.7 Cummins engine.

Electrical Problems: A fault in the engine’s wiring or sensors can cause various issues, such as poor engine performance or the activation of warning lights.

Clogged Diesel Particulate Filter: A clogged diesel particulate filter may lead to reduced power and poor fuel economy. Remember to clean or replace this filter as needed to maintain your engine’s performance.

Reliability and Safety

You want a reliable and powerful Cummins engine to ensure a satisfactory driving experience.

Over the years, there have been multiple generations of Dodge Cummins engines, with some being more reliable and durable than others.

In general, the 4th and 5th generation Cummins engines have shown better performance, while model years to steer clear of include 1992, 2003, and 2010-2013.

The earlier first-generation engines may have fewer horsepower and torque capabilities, but they were generally more consistent in durability.

One notable advantage of the Cummins diesel engine is the 24 valve Cummins, known for its strength and cold-start performance.

However, there have been some issues with faulty connections and recalls for certain Dodge Ram models, affecting the truck’s reliability and safety.

To maintain your vehicle, it’s crucial to pay attention to common complaints and perform regular maintenance.

This can help you avoid any potential problems with the truck’s transmissions, steering, and overall functionality.

By being informed, you can make better decisions on which years are the best for Dodge Cummins and enjoy a more satisfying driving experience.

Dodge Cummins Transmission and Diesel Oil

Transmissions are crucial in Dodge Cummins trucks. When considering a pre-owned truck, keep an eye on models like the 68RFE with reported transmission failures.

Your manual transmission may suffer from gear failure or poor shifting.

Fuel dilution can be a concern in the 6.7L Cummins engine. It’s important to monitor your diesel oil’s dilution rate to eliminate issues with oil lubrication and engine protection. Generally, a 5% dilution rate is acceptable.

Another potential issue is the variable geometry turbo or the injection pump. Be sure to check your truck’s oil capacity and governed speed to ensure optimal performance and reliability.

Family and Heavy-Duty Car Features

Dodge Cummins trucks are known for their spacious cabs, making them an excellent choice for families that need extra room for passengers.

This space allows you to comfortably fit your family members while still having ample room for storage and cargo.

The cabs come in various options such as the regular, quad, and crew cabs, so you can pick the one that best suits your requirements.

HD radio

As a heavy-duty car, the Dodge Cummins offers an HD radio that provides high-quality audio entertainment.

You’ll enjoy crystal-clear sound and access to a variety of music, news, and sports stations while on the road. This is especially useful during long drives or when you’re commuting between job sites.

Comfortable interior

The interior of a Dodge Cummins truck is designed with your comfort in mind. These vehicles often feature plush seating, climate control, and convenient storage compartments.

Cozy amenities

Some models even come with heated seats and steering wheels, perfect for those cold mornings or chilly evenings.

With such cozy amenities at your fingertips, you and your family can enjoy comfortable rides no matter the distance or weather conditions.


One of the most important aspects of any modern vehicle is its infotainment system, and Dodge Cummins doesn’t disappoint.

With user-friendly interfaces and up-to-date technology, you can connect your smartphone, access navigation, and control a variety of functions without hassle.


Moreover, features like Bluetooth connectivity and USB ports ensure that you can enjoy your media and keep your devices charged while on the go.

In summary, Dodge Cummins trucks offer an array of family and heavy-duty car features that cater to your needs.

With spacious cabs, HD radio, comfortable interiors, and advanced infotainment systems, you can confidently take on family trips and work responsibilities in these dependable vehicles.

Frequently Asked Questions

Best Dodge Ram 2500 model?

The best Dodge Ram 2500 model varies depending on your preferences and needs. However, the 2004 and 2008 models with the Cummins engine have been praised for their reliability and performance.

Ultimately, it is important to research and test drive various models to find the one that suits your requirements the best.

Worst Ram 2500 diesel year?

The worst Ram 2500 diesel year is often considered to be 2003. This was due to a higher number of issues reported by owners, including problematic transmissions and injector failure. It is advisable to avoid this particular year when searching for a used Ram 2500 diesel truck.

Top Ram 3500 years to avoid?

Similar to the Ram 2500, the Ram 3500 has had its share of problematic years. Some of the top years to avoid include 1999, 2001, and 2006, as they have experienced more significant issues and recalls compared to other years.

Best and worst Ram 2500 years?

In general, the 2004 and 2008 Ram 2500 models with the Cummins engine are considered among the best.

On the other hand, the 2003 Ram 2500 is often considered to be the worst year due to the various issues and complaints reported by owners.

As with any used vehicle purchase, it is important to thoroughly research and inspect the specific truck you are considering buying.

Most dependable Cummins engine?

The most dependable Cummins engine is typically found in the 2004, 2008, 2011, 2014, and 2019 models of Dodge trucks.

These years have been well-regarded for their reliability, performance, and fewer reported issues. However, other factors like the truck’s maintenance history and usage can significantly impact its long-term dependability.

What are the most reliable years for Ram trucks with 6.7 Cummins engines?

There are certain years that stand out more than others. Here are a few of the best years, in listed order, that offer improvements and refinements that make them worth considering for your next truck.

  1. 1989: This is the year when Cummins diesel engines first powered Dodge Ram pickups. As a pioneer, this classic model offers a solid foundation and engine performance that enthusiasts love.
  2. 2003-2009: These years marked significant enhancements in the Cummins engines, including better fuel economy, advanced emissions technology, and improved overall performance. You’ll appreciate the noticeable difference in ride quality compared to previous models.
  3. 2010-2018: During this period, the Cummins engines received further refinements, making them even more reliable and efficient. Additionally, these trucks come equipped with various modern amenities and technological advancements that make driving and towing a breeze.
  4. 2019: This year offers the latest innovations in Cummins engines, such as further enhanced fuel efficiency and improved emissions systems. This model is ideal if you’re looking for a truck that meets the most stringent emissions standards while still delivering a powerful and reliable performance.

In which years did the 6.7 Cummins engine receive significant updates?

The 6.7 Cummins engine was first introduced in Dodge’s 2007 model year production of its Ram line. In this debut, the engine produced 350hp and 650 lb-ft of torque. Since then, it has undergone continuous improvements.

In 2021, the 6.7L Turbo Diesel received significant updates, including increased power ratings of 370-420 hp and 850-1075 lb-ft of torque.

These improvements, along with EPA 2020 certification, make it a powerful and reliable option for your diesel needs.

Keep in mind that every engine has its limitations, and some years might not be ideal to purchase. It’s essential to research and potential issues specific to the year you’re considering, before making a decision.


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