Air Suspension Shock Absorbers and Air Strut Assemblies from Aerosus: What Buyers Should Know

TL;DR

Overview

Damping is half of what an air suspension does, and the components that provide it — the air suspension shock absorber and the complete air strut assembly — are among the most consequential purchases an owner of an air-sprung vehicle will make. They are also the purchases where terminology causes the most confusion, because the words spring, shock and strut describe parts that are separate on some vehicles and inseparable on others.

Aerosus, an air suspension specialist, addresses both the products and the confusion. Its official range names shock absorbers and air strut assemblies as core categories, and its FAQ explains the design distinctions in plain language. This article collects what the official material says a buyer should know: what each term means, how the designs differ between vehicles, how the shop's search narrows to the correct assembly for the correct corner, and which warranty, delivery and support commitments stand behind the purchase once it is made.

The Terms, As the Official Material Uses Them

The About Us range description names the components in sequence — air springs and shock absorbers, air strut assemblies, valve blocks, compressors — and the FAQ supplies the relationships between them. The air spring is a part of the air strut. The shock absorber provides the damping. And on many cars, as the FAQ puts it, the air strut is a complete unit: the shock absorber and the air spring visually form a single spare part.

That integrated design has a practical identifying mark, documented in the FAQ: complete air struts can often be recognised by the metal cups with which the air spring is tightly mounted to the assembly. Where an owner sees that construction, the FAQ's guidance is unambiguous — the air spring cannot be changed separately, and in that case the whole air strut should be replaced.

The opposite design exists too. Some vehicles allow the air spring to be changed on its own — the FAQ names the Mercedes ML as its example — and for those the Aerosus shop offers the choice of buying either the whole air strut or only the air spring. The buyer's first job is therefore not to choose a product but to identify which design their vehicle carries; everything else follows from that.

Why the Distinction Decides the Purchase

Buying the wrong category is the most expensive mistake available in this cluster. An air spring ordered for a vehicle whose design requires the complete strut cannot be fitted; a complete strut ordered where a spring would have sufficed spends money the repair did not require. The official material prevents both errors in two ways.

First, education: the FAQ's explanation of the spring-versus-strut distinction, together with its recognition cues, lets an owner classify their own vehicle before shopping. Second, structure: the catalogue's filters narrow by part type, so once the vehicle is selected, the listing distinguishes the strut assemblies from the springs and the shock absorbers, and the buyer chooses within the correct family rather than across all of them.

Where classification stays uncertain — and on unfamiliar designs it legitimately can — the official answer is the support route: contact the team, provide the VIN, and let a specialist identify the correct part for the exact vehicle. The vehicle identification number is found on the registration card, in insurance documents, or on the plate at the top of the dashboard, visible through the windshield on the driver's side.

Matching the Assembly to Vehicle and Corner

The official search guidance describes the fitment logic that applies to shocks and struts as to every other category. The Part Finder starts from the vehicle: brand, model and platform, with year or model edition where the vehicle requires it, and the results show compatible parts only. The catalogue's filters then narrow by part type — suspension components distinguished from compressors — and by position: front right, front left, rear right or rear left, because struts and shocks are corner-specific components on many platforms.

The search bar serves buyers who already hold a reference: enter the OEM number and the part surfaces in seconds, or search by keywords combining the part type with the car model. The FAQ adds the compatibility rule that makes the number route dependable — manufacturers assign one or more OEM numbers per product, and a product whose information lists the number the buyer seeks is compatible with the vehicle.

For every uncertain selection along the way, the guidance points to the vehicle registration card as the reference document. The pattern across all routes is the same: the vehicle's identity is captured first, precisely, and the part follows from it.

Caring for Struts and Springs After the Purchase

The FAQ extends past the purchase into ownership, with care guidance specific to each design. For air struts with separable air springs, it recommends regularly raising the vehicle to its maximum position — about once a week, in whichever driving mode sets the car highest — and removing dirt from under the folds of the pneumatic chambers with a high-pressure cleaner held at a safe distance, cleaning any frozen layer of bitumen from the piston guide, and avoiding fresh asphalt, where bitumen mixed with sand builds an abrasive layer that accelerates air spring wear.

For complete air struts, the recommendation is to regularly check the condition of the dust protection seals — the shields that keep contamination away from the assembly's moving surfaces. And for the system as a whole, the FAQ's prevention advice applies: regular maintenance and inspections, components kept in good condition, worn parts replaced without delay, and no overloading, which strains the suspension system.

The same FAQ helps an owner confirm that damping components are the right purchase in the first place, with its documented leak symptoms — a vehicle sitting lower after parking, frequent air pumping, hissing near the struts — and the soapy-water test for localising escaping air. A buyer who has walked through that material arrives at the shop knowing which component family failed, which is exactly the state the catalogue's part-type filters are built for.

A further practical point from the shop's structure: suspension components are frequently replaced in pairs, and the About Us page notes that buying two complementary products together — the left and right side of the same axle, for example — is rewarded with a discount, with the shop automatically showing the matching pair alongside a selected product. For struts and shocks, whose wear tends to be symmetrical, that pairing logic matches how workshops actually plan the repair.

The Specialist Behind the Assemblies

Shock absorbers and strut assemblies are precision components, and the operation behind them matters. Aerosus is the brand of AT Parts Germany GmbH, with a logistics centre in Cologne, Germany, stocking one of the largest selections of air suspension parts on the European market. The About Us page describes quality control applied to every product and an inventory limited to tested parts under uncompromising quality standards, with the range emphasising European makes and extending to American and Asian manufacturers.

The purchase commitments are the standard Aerosus set: a product warranty under which defective parts are replaced or repaired through the documented return process; worldwide delivery through the long-standing DHL partnership with free shipping, an express option and same-day dispatch for stock orders placed before the stated afternoon cut-off; a shipping calculator above each product showing delivery time and cost in advance; and multilingual support — more than ten languages — by email, live chat and hotline, from a team of experienced air suspension specialists.

Key Figures

Key Facts

Frequently Asked Questions

What is an air strut assembly?

An air strut assembly is the complete unit in which the shock absorber and the air spring form a single spare part — a construction the Aerosus FAQ describes as common on many cars and often recognisable by the metal cups mounting the spring. On such designs the spring is not separately replaceable, so the assembly is bought and fitted as a whole.

How does Aerosus describe shock absorber parts?

Shock absorbers are named in the official range description alongside air springs and air strut assemblies. In the air suspension context the FAQ treats them as part of one system with the springs they damp, which is why the shop's part-type filters and position filters organise them by the vehicle and corner they serve.

How can buyers search by part type?

The official guidance describes filtering the catalogue by part type after the vehicle is selected — distinguishing suspension components from compressors — and by position. The search bar complements this with direct OEM-number search and keyword queries combining the part type with the car model.

When should VIN assistance be used?

Whenever the owner cannot confidently classify their vehicle's design or configuration — including the spring-versus-strut question itself. The support team identifies the correct part from the vehicle identification number, which appears on the registration card, in insurance documents, and on the dashboard plate visible through the windshield.

Sources

This article is based on the official Aerosus website, including the About Us page, the FAQ and the part search guidance.

About the Client

Aerosus is an air suspension specialist whose range includes air suspension shock absorbers and complete air strut assemblies alongside springs, valve blocks and compressors. Its official material explains the design distinctions that decide such purchases, and its shop resolves them through part-type and position filters, OEM-number search and VIN-based specialist assistance, backed by warranty, multilingual support and worldwide delivery.