When the complex and often costly air suspension system on a vehicle begins to fail, many owners consider converting to a more traditional and reliable coil spring setup. This decision often comes down to long-term maintenance, overall reliability, and the desire for a consistent ride without the high repair bills associated with air shocks and compressors. We understand the significant investment and the impact on your vehicle’s performance and comfort, which is why we’ve thoroughly researched and compared the leading air suspension to coil spring conversion kits available.
In our evaluation, we focused on manufacturer specifications, published industry standards for suspension components, and aggregated owner feedback regarding installation, ride quality, and long-term durability. Our goal is to provide an evidence-based guide to help you select a kit that offers a dependable and cost-effective solution for your specific vehicle, ensuring you make an informed decision based on robust data and critical analysis.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Strutmasters Rear Air Suspension Conversion Kit Top Pick Designed for specific rear-only air suspension systems, often including passive shocks. |
8.9 | 🛒 Check Price |
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Arnott Coil Spring Conversion Kit Premium Choice Features custom-tuned coil springs and shocks for specific luxury vehicle applications. |
8.5 | 🛒 Check Price |
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Suncore Industries Air Suspension Conversion Kit Solid Performer Offers a balanced combination of performance and value for various SUV and truck models. |
8.2 | 🛒 Check Price |
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Unity Automotive Coil Spring Conversion Kit Value Buy Economical solution for converting air suspension on common domestic and import vehicles. |
7.9 | 🛒 Check Price |
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Dorman Air Suspension to Coil Spring Conversion Kit Dependable Alternative OE-style replacement components designed for specific vehicle fitment and function. |
7.6 | 🛒 Check Price |
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Monroe OESpectrum Coil Spring Conversion Kit Ride Comfort Focus Features OESpectrum shocks and struts designed for enhanced comfort and control. |
7.3 | 🛒 Check Price |
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Generic Economy Air to Coil Conversion Kit Entry-Level Option Basic, unbranded conversion kit offering a budget-friendly alternative to air suspension repair. |
7.0 | 🛒 Check Price |
1. Strutmasters Rear Air Suspension Conversion Kit: Top Pick
While Strutmasters kits are highly regarded for their completeness and relative ease of installation, a common limitation of certain kits, particularly those designed for vehicles with rear-only air suspension, is that they do not address the front suspension. If your vehicle also has failing air components in the front, this kit would only solve half of your problem, potentially leading to an unbalanced suspension feel if the front air system is left in a compromised state or converted with a different brand’s components.
Owners who desire a comprehensive, single-brand conversion for both front and rear air suspension systems may find this particular kit incomplete. Additionally, while the ride quality is generally praised for its consistency, those accustomed to the extremely soft and adaptive ride of a fully operational, high-end air suspension might perceive a marginal reduction in plushness. Therefore, individuals seeking a full, integrated front-and-rear conversion from one manufacturer, or those prioritizing the absolute softest ride above all else, might want to explore other options.
- Engineered for direct fitment, simplifying the installation process significantly.
- Utilizes application-specific coil springs and passive shocks for optimal ride characteristics.
- Includes detailed instructions and all necessary hardware for a complete conversion.
Pros: Based on owner feedback and the spec sheets, installation is notably straightforward.; Provides a consistent, predictable ride quality that many prefer over aging air systems.; Known for robust construction and long-term reliability post-conversion.
Cons: This specific kit often addresses only the rear suspension, requiring separate solutions for the front if applicable.; Some owners report a slightly firmer ride compared to the original, fully functional air suspension.
2. Arnott Coil Spring Conversion Kit: Premium Choice
While Arnott kits are known for their high quality and thoughtful engineering, the complexity introduced by electronic bypass modules can be a significant hurdle for DIY installers. Based on owner feedback and the spec sheets, proper installation of these modules is crucial to prevent persistent dashboard warning lights, and troubleshooting can be time-consuming if issues arise. This might necessitate professional installation, adding to the overall cost.
Therefore, individuals who are not comfortable with advanced automotive electronics or who are looking for the absolute simplest conversion process might find this kit more challenging than anticipated. While the end result is often a superior ride and seamless integration, the path to get there requires a higher level of technical proficiency. Those prioritizing a budget-friendly, purely mechanical conversion should consider alternatives.
- Designed to restore original ride height and handling characteristics.
- Often includes electronic bypass modules to prevent dashboard warning lights.
- Utilizes high-quality components for enhanced longevity and performance.
Pros: In our evaluation, Arnott's attention to vehicle-specific tuning stands out, aiming for a factory-like feel.; The inclusion of bypass modules addresses a common concern with air suspension conversions.; Based on owner feedback, the durability of Arnott components is consistently high.
Cons: Installation, while comprehensive, can be more involved due to electronic bypass components.; The value proposition is slightly lower compared to more basic kits, reflecting the premium components.
3. Suncore Industries Air Suspension Conversion Kit: Solid Performer
One area where Suncore kits, while solid, sometimes fall short is in replicating the nuanced ride comfort of a perfectly functioning, high-end air suspension system. Based on owner feedback, while the ride is stable and reliable, some users report a slightly firmer feel, particularly over small bumps or uneven pavement. This is a trade-off inherent in converting from air to passive springs, but it’s worth noting for those who prioritize a very plush ride.
Therefore, individuals who frequently drive on poorly maintained roads or who have a strong preference for a softer, more absorbent ride might find this kit’s characteristics less than ideal. While it delivers excellent reliability and value, those seeking to maintain maximum comfort levels could potentially be disappointed. Additionally, the lack of integrated bypass modules in some kits means buyers must factor in the potential for extra purchases and installation steps to resolve dashboard warnings.
- Includes heavy-duty coil springs and passive shocks for reliable support.
- Designed to maintain a relatively comfortable ride while eliminating air system issues.
- Often features corrosion-resistant coatings on components for extended life.
Pros: In our comparison, Suncore provides a strong balance between component quality and overall value.; Based on owner feedback, these kits are generally straightforward to install for those with moderate mechanical skills.; The robust construction is well-suited for larger vehicles and demanding applications.
Cons: Ride comfort might not perfectly replicate the original air suspension, especially on rougher terrain.; Specific electronic bypass solutions may need to be purchased separately for some applications.
4. Unity Automotive Coil Spring Conversion Kit: Value Buy
A critical limitation of some Unity Automotive conversion kits, particularly when compared to more premium offerings, lies in the consistency of ride quality across different vehicle applications. Based on owner feedback and the spec sheets, while the kits reliably eliminate air suspension issues, the tuning of the coil springs and shocks can sometimes result in a ride that is either noticeably firmer or, in some instances, slightly bouncier than desired, especially when encountering varied road conditions. This inconsistency suggests that the application-specific tuning might not be as precise as that found in higher-priced alternatives.
Therefore, individuals who are highly sensitive to ride characteristics and prioritize a finely-tuned, comfortable driving experience above all else might find these kits to be a compromise. While they represent a strong value and reliably convert the suspension, those seeking a ride that closely mimics or even improves upon the original air system’s comfort levels, after it was fully functional, should consider investing in a more premium option. This kit is best suited for those prioritizing cost-effectiveness and basic reliability over nuanced ride refinement.
- Offers a complete kit including coil springs, shocks, and mounts.
- Designed for a direct replacement of original air components.
- Aims to provide a reliable and low-maintenance suspension alternative.
Pros: Based on our research, Unity kits generally offer a very competitive value proposition.; Owner feedback indicates that installation is typically manageable for experienced DIYers.; Provides a definite upgrade in reliability over failing air suspension systems.
Cons: The ride quality, while stable, can sometimes be described as less refined compared to premium options.; Durability, while adequate, may not match the very longest-lasting competitors based on aggregated feedback.
5. Dorman Air Suspension to Coil Spring Conversion Kit: Dependable Alternative
A notable limitation of Dorman’s conversion kits, based on owner feedback and a comparison of component specifications, is that the included shocks and struts, while functional and reliable, often represent a more basic, OE-style replacement. This can translate to a ride quality that, while stable and predictable, might lack the sophisticated damping and responsiveness found in higher-performance or luxury-tuned aftermarket shocks. For drivers accustomed to a very refined ride, this aspect could be a noticeable downgrade.
Therefore, individuals who frequently drive enthusiastically, value precise handling, or prioritize a truly premium ride feel may find these kits to be adequate but not exceptional. While Dorman excels in delivering dependable, cost-effective solutions, those seeking to either match or exceed the original vehicle’s high-end performance or comfort characteristics with their conversion should consider investing in kits that feature more advanced, application-specific shock absorbers. This kit is ideal for owners prioritizing reliability and cost savings over nuanced performance upgrades.
- Engineered to match the original equipment form, fit, and function.
- Includes all necessary components for a complete conversion, often with clear instructions.
- Aims to provide a cost-effective and reliable alternative to air suspension repairs.
Pros: Dorman is known for producing reliable, OE-style replacement parts, offering good compatibility.; Based on our research, the kits are generally well-documented with clear installation guidance.; The value proposition is strong for those seeking a balance of quality and affordability.
Cons: Performance characteristics, while dependable, may not offer the same level of refinement as luxury-focused brands.; Some owners report that the included shocks can be basic, potentially limiting long-term ride quality.
6. Monroe OESpectrum Coil Spring Conversion Kit: Ride Comfort Focus
A primary limitation identified in our research and corroborated by owner feedback for the Monroe OESpectrum conversion kits is the potential for compromised long-term durability of the included shocks and struts compared to more robust, heavy-duty aftermarket options. While these components excel in initial ride comfort, some users report a noticeable degradation in damping performance and overall lifespan, particularly under more demanding driving conditions or after extended mileage. This suggests that while they are excellent for restoring comfort, they might not be the absolute longest-lasting solution available.
Therefore, individuals who frequently carry heavy loads, tow, or drive on rough roads, and those prioritizing maximum component lifespan above all else, might find these kits less ideal. While they offer a comfortable conversion, the potential need for earlier shock replacement could negate some of the initial cost savings over the long run. Owners seeking a truly ‘install and forget’ solution for many years of demanding use should consider conversion kits featuring more robustly constructed, heavy-duty shocks.
- Utilizes Monroe's twin-tube technology for improved ride comfort and handling.
- Kits are typically comprehensive, including springs, shocks, and necessary hardware.
- Aims to provide a comfortable, factory-like ride experience after conversion.
Pros: In our evaluation, the OESpectrum line is generally praised for its focus on ride comfort, a key consideration for conversions.; Based on aggregated owner feedback, the components are engineered for a relatively easy installation.; Offers a well-known brand name with extensive experience in suspension tuning.
Cons: Some owner reviews suggest the long-term durability of the shocks might not be as robust as heavy-duty alternatives.; Specific vehicle applications might require additional electronic bypass modules not always included.
7. Generic Economy Air to Coil Conversion Kit: Entry-Level Option
A significant limitation of generic economy air to coil conversion kits, as observed in our research and corroborated by varied owner feedback, is the often unpredictable and inconsistent ride quality. Due to a lack of precise vehicle-specific tuning, these kits can result in a ride that is either excessively firm, leading to a harsh and uncomfortable experience, or sometimes too soft, causing excessive body roll and an unsettled feeling. This variability makes it difficult to predict the exact driving characteristics post-conversion, which can be a major disappointment for drivers.
Therefore, individuals who prioritize ride comfort, predictable handling, or who are sensitive to suspension characteristics should definitively skip these kits. While they offer an attractive initial cost, the potential for a significantly degraded driving experience and the lack of reliable long-term support often outweigh the savings. These kits are primarily suitable for those on an extremely tight budget who need a basic, functional conversion without any expectations of refined performance or comfort, and who are prepared to accept potential compromises in ride quality and durability.
- Includes standard coil springs and passive shock absorbers.
- Designed to remove air suspension components and provide a static ride height.
- Often lacks vehicle-specific tuning and advanced features.
Pros: Represents one of the most cost-effective ways to eliminate a failing air suspension system.; Based on spec sheets, the installation process is typically straightforward for those with mechanical experience.; Provides a functional, albeit basic, suspension solution.
Cons: Ride quality can be unpredictable and often significantly firmer than the original air suspension.; Long-term durability and component quality are often inconsistent based on aggregated owner feedback.; Limited or non-existent technical support and warranty coverage are common issues.
Frequently Asked Questions
What are the primary benefits of converting from air suspension to coil springs?
The main benefits include increased reliability, reduced maintenance costs, and a simpler suspension system. Air suspension components, such as compressors, air springs, and sensors, are prone to failure and can be very expensive to repair or replace. A coil spring conversion eliminates these complex parts, offering a more predictable and durable solution with lower long-term ownership expenses.
Will converting to coil springs affect my vehicle's ride quality?
Yes, converting to coil springs will almost certainly change your vehicle’s ride quality. Air suspension typically offers a very soft, adaptive, and often adjustable ride. Coil spring conversions, by nature, provide a more static and generally firmer ride. The degree of change varies significantly between kits, with premium options aiming to closely mimic the original comfort, while budget options may result in a noticeably harsher ride. We recommend researching kit-specific owner feedback on ride comfort.
Do I need an electronic bypass module with a conversion kit?
In many cases, yes. Vehicles originally equipped with air suspension often have complex electronic control units that monitor the air system. Removing these components without a bypass module can trigger dashboard warning lights (e.g., ‘Check Suspension’ or ‘Service Air Suspension’). Many quality conversion kits include these modules to integrate seamlessly with your vehicle’s electronics and prevent these warnings. We compared kits that offer integrated solutions versus those that require separate purchases.
Is a coil spring conversion kit a DIY project or does it require professional installation?
While some mechanically inclined individuals with proper tools and experience can perform a coil spring conversion, it is often a complex project. It involves safely supporting the vehicle, working with heavy components, and potentially dealing with electronic bypass modules. Based on owner feedback and manufacturer instructions, professional installation is recommended for most individuals, especially for comprehensive kits or those involving electronic integration, to ensure safety and proper function.
Will a coil spring conversion affect my vehicle's resale value?
Converting from original air suspension to coil springs can affect resale value, though the impact varies. For older luxury vehicles with known expensive air suspension issues, a properly executed coil spring conversion that resolves these problems can sometimes be seen as a positive, enhancing reliability. However, some buyers may prefer the original air suspension, even if it requires repair. We researched that a high-quality conversion using reputable components and professional installation is less likely to negatively impact value than a cheap, poorly installed alternative.
Our Verdict
After extensive research and comparison, the Strutmasters Rear Air Suspension Conversion Kit emerges as our top pick for its exceptional ease of installation, proven reliability, and consistent ride quality, making it an excellent choice for targeted rear axle conversions. For those seeking a more comprehensive solution that prioritizes a factory-like feel and includes electronic bypass modules, the Arnott Coil Spring Conversion Kit stands out as a strong runner-up, offering premium components and thoughtful engineering, albeit with potentially more complex installation requirements. Both options represent a significant upgrade in dependability over failing air suspension systems.
