Six tips for maintaining and repairing air suspension systems
27 August 2026 
Air suspension systems are no longer just for luxury vehicles. They’re showing up across the automotive landscape, offering smoother rides, precise handling, and automatic load levelling. For shops and parts counters, this trend means more opportunities to guide customers, advise on replacements, and troubleshoot problems efficiently.
Working on air suspension requires care, the right tools, and an understanding of how components interact. Here are six tips to help you maintain and repair air suspension systems safely and effectively.
Prioritise safety before starting repairs
Safety should always come first when working on automotive repairs. This includes vehicles equipped with air suspension. Following the safety guidelines below will ensure no harm to the technician or the vehicle.
Since air suspension systems can operate at high pressures, verify that pressure has been relieved and disconnect power to the air suspension system before disassembly. Do not allow dirt or grease to enter the system. Always wear standard hand, ear, and eye protection when servicing the air suspension system. Finally, safely lift and secure the vehicle.
Depressurise carefully
Proper depressurisation is a critical step in preventing accidental damage during service. To protect both the technician and the components, release the pressure in a gradual, controlled fashion, and never remove fittings suddenly. Also note that some vehicles require a diagnostic tool to open solenoids and release air. Look for connectors on the air spring to determine this. If available, use “jack mode” to prevent the system from adjusting while the vehicle is lifted.
Avoid common maintenance mishaps
Proper installation is essential for ensuring long-term reliability of air suspension components. Even small missteps during this stage can lead to premature failure or additional repairs down the line.
Avoid damaging the air spring by always supporting the vehicle when the system is depressurized and not pressurizing the air springs during installation. Not adhering to either or both can cause the air spring to unfold improperly when inflated and potentially damage the crimp ring. Additionally, if the vehicle is lowered without air pressure in the air springs, the compressor may fail to generate sufficient pressure to lift the vehicle. This can lead to the compressor overheating and possibly damage the compressor relay.
Always adhere to the manufacturer’s recommended torque specifications, especially with VOSS connectors. VOSS air line connectors are designed for quick, secure connections and usually do not need tightening. Over-tightening them can strip threads and cause leaks. If tightening is necessary, Arnott recommends using a torque wrench to avoid potential damage.
Detect faulty components early
Catching failing parts before they completely fail helps avoid additional damage and reduces labour time and money.
A drop in ride height of about 1 inch or more overnight is a clear sign of leakage. Start inspecting the system. Spray soapy water around the system. Bubbles will indicate a leak. If the ride height is uneven (i.e., one corner of the vehicle is sagging), the valve block may instead be the issue.
Check the struts or shocks for oil leaks. Oil residue can damage the rubber of the air sleeves and reduce their lifespan. A leak in the damper may also hinder the shock absorber’s ability to absorb impacts. In this instance, the air spring can be overworked and fail prematurely.
Continued leaks can cause the compressor to overwork. The ECU (Electronic Control Unit) will constantly determine that the vehicle’s ride height is too low and direct the valve block and compressor to send more air to the failing air spring/strut. This sustained overuse may lead to burnout. In the event of an air suspension system leak, double-check the compressor. If there is discolouration, melted connectors or lines, and/or a burnt smell, the compressor may be burning out.
Diagnose the root cause not just the symptoms
When an air suspension failure occurs, replacing the affected component may not be enough. Identify and address the source of the issue to avoid repeat repairs.
Check for cascading damage. For example, a leaking shock may have already compromised the air spring, and a failed spring may have overworked the compressor.
Replace relays with compressors. A faulty or sticky relay can cause a new compressor to fail prematurely by running continuously.
Once repairs are complete, perform a full system check to ensure nothing was missed.
Diagnostic tools & updates
Modern air suspension systems are highly integrated with vehicle electronics. After maintenance or repairs are complete, proper calibration and, in rare circumstances, software updates are essential to ensure everything works as intended.
Recalibrate ride height sensors with a diagnostic scan tool to verify and adjust ride height settings in order to avoid fault codes or incorrect operation. After test driving the vehicle, confirm that no diagnostic fault codes have reappeared in the system.
The bottom line
Air suspension systems demand attention, knowledge, and the right tools. By prioritising safety, using proper diagnostics, and following these tips, you can maintain and repair systems efficiently, keeping them performing reliably.
For shops recommending replacement parts, Arnott’s line of air springs, struts, and compressors meets OE standards and helps ensure dependable, long-lasting repairs for your customers.
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