The important way is finding OEM Part Number 
If for any reason you cannot find your specific air suspension part by entering your vehicle's year, make and model, you can find it by the part's Original Equipment Manufacturer (OEM) number. The OEM part number can be found directly on the part itself. You can also call a dealership with your VIN, and they will provide you with the OEM part number.

For example, the Air spring OE number as the below picture.

Air spring failure is usually due to age or moisture in the air system. The air bag may also get punctured due to continuous exposure to road debris.

It should be properly installed; otherwise, it may rub against the auto's frame and other components, resulting in a premature failure. 

While replacing damaged air springs, it is advisable to replace them in pairs. At autoairsuspension.com, you can find suspension spring kits for every make and model. Purchasing a suspension spring kit will give you a huge discount.

you can also find OE number for valve block, air compressor, shock absorber when you have to replace it.