Ram 4 Corner Air Suspension Problems

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The Ram 4 corner air suspension system has long been heralded as a groundbreaking innovation in the world of automotive engineering. However, beneath the veneer of sophistication lies a set of intricate components that are not immune to issues and malfunctions. 

From unexplained sagging to erratic height adjustments, the Ram 4 corner air suspension problems have sparked discussions among automotive connoisseurs and raised concerns among truck owners who rely on its performance in diverse terrains. 

Whether you’re an owner seeking solutions or simply intrigued by the inner workings of this cutting-edge technology, join us as we navigate through the intricacies of Ram’s 4-corner air suspension system and unravel its challenges with expertise and clarity.

What is Ram 4 Corner Suspension?

Are you acquainted well enough with the technical facts about the Ram 4 corner air suspension? If not, this portion is important for you. Ram’s 4 Corner air suspension system, also known as the Active-Level 4 Corner Suspension, is a unique feature available only in RAM trucks. 

It automatically adjusts the vehicle’s height during highway driving, a capability it has offered since the fourth generation (2013-2018) and continues to provide in the fifth generation (2019-present). This system individually manages air pressure in each of the four air springs, allowing for independent raising or lowering of each wheel. 

This functionality is especially beneficial when carrying heavy loads, towing, or navigating uneven terrain around Sherman. The system also includes load-leveling capabilities that automatically adjust air pressure to maintain a level ride when cargo is loaded into the bed. This ensures stability and balance for improved safety and control. 

Additionally, the RAM Air Suspension offers multiple ride height settings for everyday driving, highway speeds to reduce drag and enhance fuel efficiency, as well as Off-Road modes that increase ground clearance for tackling rugged terrain.

In terms of comfort, the air springs in RAM Air Suspension provide a smoother ride compared to traditional steel springs by effectively absorbing road imperfections. 

5 Common Ram 4 Corner Air Suspension Problems

Ram 4 Corner Air Suspension Problems

While air suspension is prone to issues, many become more severe and concerning if it occurs frequently. In this section, we’ll focus on those 4 corner air suspension issues that are relatively more common among users. 

Air Suspension Failure at Low Temperature

The Active-Level 4 Corner Suspension system in Ram trucks can be susceptible to malfunction in extreme cold weather. The air suspension may cease functioning abruptly due to issues such as blown fuses, frozen valves, or a damaged air compressor. These problems can significantly impact the vehicle’s ride quality and handling in cold temperatures.

One common issue is the blowing of fuses within the air suspension system, leading to an immediate loss of functionality. Additionally, frozen valves can restrict the flow of air within the system, causing it to stop working altogether.

Another potential cause of failure is a damaged air compressor, which can struggle to operate efficiently in extremely low temperatures. As a result, the active-level 4 corner suspension may become non-responsive or erratic during cold weather conditions.

Possible Solution:

To address the issue of cold failure in the Ram 4 corner air suspension system, it is necessary to first locate the OH 40 fuse within the Fuse-Box. This can be found under the hood near the firewall. Once located, remove the Fuse and inspect the metal part inside for any signs of damage or splitting. If such damage is present, it indicates that the fuse needs to be replaced.

If the fuse does not appear to be the cause of the issue, attention should then turn to the Air Suspension Pneumatic Valves. These valves may have frozen and become blocked while the compressor continues to operate. This situation poses a potential danger and could lead to more serious problems within the air suspension system.

Now, if there is no noise coming from the Air compressor, it is advisable to check the Relay responsible for running it. This can be done by shorting the 2 terminals and listening for any indication that the compressor has started running.


To properly warm up your Ram truck and prevent potential issues with the 4 corner air suspension system, it is recommended to use an air brake anti-freeze de-icer lubricant readily available at local hardware stores. Follow these steps for optimal results:

1. Begin by removing the T25 torques at the tailgate to access the tail lights on the right side of the truck.

2. Once the tail lights are removed, locate two hoses: one for exhaust and one for the filter.

3. Carefully remove the filter by hand, ensuring it is not damaged in the process.

4. Pour approximately an ounce of de-icer into the filter tube.

5. After adding the de-icer, warm up essential components of the air suspension system, such as the compressor and valve, to verify their functionality. Take care not to overheat or melt nearby plastics.

6. This procedure remains effective even in temperatures as low as -20°C.

7. In regions with prolonged sub-zero conditions, it is advisable to repeat this process every two months to prevent potential failures.

8. As a precautionary measure, park your RAM truck indoors in a garage.

Compressor Failure

The recent class action lawsuit against Dodge Ram in Canada has brought attention to reported issues with the 4-corner air suspension system. The primary concern revolves around a faulty compressor, which is prone to failure due to condensation, dampness, or moisture ingress. 

This causes the internal valves to jam and blow control fuses, leading to accelerated wear and tear on various vehicle components such as fuses, relays, bolt joints, and bushings. 

Consequently, this affects the alignment of the wheels and results in safety, comfort, and ride quality issues for vehicle operators. The lawsuit also alleges that in some instances, the air suspension defect can lead to unintended airbag deployment while driving, causing brakes and tires to lock up and resulting in additional damages requiring repair for the affected vehicles. 

Possible Solution:

To address this issue, it is recommended to first check for any signs of moisture or water accumulation around the compressor and its components. It is important to keep the area around the compressor dry and well-ventilated. Additionally, regular inspection and maintenance of the air suspension system are crucial to identify any potential problems early on.

If there are visible signs of moisture or condensation, it may be necessary to consult with a qualified technician or dealership for further evaluation and potential repair or replacement of the faulty components. 

3. Automatic Height Adjustment Failure

The Ram Active-Level System occasionally experiences issues with self-adjustment, particularly in the RAM 2500 and 3500 models equipped with a leveling system designed to maintain rear-ride height. This system offers two main positions: Normal Ride Height (NRH) as the standard position and Alternate Trailer Height for lowering the suspension by 1 inch to assist in loading. 

A properly functioning system will have a light that blinks during ride height adjustments. However, if the system is not operating correctly, it may fail to self-adjust.

Some four-corner air suspension problems can affect these models, such as inconsistencies in maintaining ride height or difficulty in lowering or raising the suspension as needed. Additionally, issues may arise with leveling performance, potentially causing uneven riding and less stability when towing heavy loads.

Possible Solution:

The self-adjustment mechanism may encounter obstacles due to various factors, necessitating the identification of the underlying issue for resolution. For example, internal damage or distortion within the airbag sleeve can prevent it from inflating properly when subjected to pressure. 

Additionally, the installation of a lift kit could potentially cause harm to the air suspension system. Notably, owners of 4th generation Ram Trucks (2009 to 2018) have frequently reported instances of Ride-Height Adjustment failure following the installation of aftermarket lift-kit solutions. This has been a common issue with RAM 4 corner air suspension systems. 

Therefore, it is crucial to adhere to proper installation procedures and thoroughly assess compatibility between aftermarket components and existing systems. Besides, carefully inspect the airbag sleeves for any signs of damage or distortion that could impede proper inflation. 

Airbag Leakage

The 4 Corner air suspension system in Ram trucks has been plagued by air leakage issues, resulting in numerous complaints from owners. Specifically, drivers have reported a disconcerting wandering sensation in the rear suspension during ordinary driving, indicating a lack of self-adjustment. Furthermore, many have noted an alarming lack of responsiveness when traversing bumps or uneven terrain.

This recurrent problem has led to frustration among Ram truck owners who expect smooth, controlled handling from their vehicles. The root cause appears to stem from air leaks within the intricate air suspension system, compromising its ability to maintain proper pressure and adjust to changing road conditions.

Possible Solution:

If you are experiencing issues with the air suspension of your Ram 4, particularly focusing on the corner airbags, there are a few steps you can take to identify and potentially resolve the problem. Oftentimes, dust buildup or leaks can be a common culprit for malfunctioning airbags. To begin troubleshooting, carefully slide down or remove the dust cover of the airbag to allow for a clear view of its components.

Next, create a solution using diluted soapy water and thoroughly spray it around every corner of the airbag. This step is essential for detecting any leaks as well as identifying potential areas of concern. 

Allow the soapy water to soak for a while before closely observing the entire airbag for any white spots that may indicate leaks or punctures. Where white spots are identified, carefully wipe off any excess soapy water and then reapply more solution as needed. 

5. Unusual Noise from the Compressor

When the vehicle’s Ride Height is adjusted by the system, the compressor draws in air, resulting in a noticeable noise. Over time, you become accustomed to this normal level of noise. If the air compressor sounds different from its original factory-fitted sound, it may indicate an issue in the system. 

Occasionally, the noise may become louder if there is a problem. A warning message may appear stating that the system is disabled due to excessive load and that the air suspension is cooling down—prompting you to wait.

If you notice that the compressor sounds different than usual, it is likely due to moisture entering the air suspension circuit. This moisture can cause the compressor to eventually seize and shut down the entire air suspension system. While there are instances where this problem temporarily disappears, it often returns eventually.

Possible Solution:

When experiencing unusually loud noise while driving, consider listening to the noise while the truck is stationary. If the noise diminishes, it may indicate that the tire is rubbing against the wheel well. 

Conversely, if the noise remains loud while parked, the issue may lie with the compressor. It is prudent to have a qualified technician examine the situation. In the unfortunate event of a complete air compressor failure, replacement may be necessary to resolve the problem. 

This advice pertains specifically to potential problems with ram 4 corner air suspension systems and should be considered from an expert standpoint.

Final Words

Ram 4 corner air suspension system has faced its fair share of challenges and problems that have affected the overall performance and reliability of the vehicle. The issues with leaks, compressor failures, and sensor malfunctions have led to an increased need for repairs and maintenance, resulting in inconvenience and potential safety concerns for owners. 

Ram must address these issues promptly and effectively to restore confidence in their air suspension system. Owners should stay informed about recalls and technical service bulletins related to this problem, and seek professional assistance for any signs of trouble with their Ram’s air suspension.

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