A side step is one of the few car accessories that carries a person’s full weight, often with a twist as they climb in. When it fails, it fails at the bracket, and the customer finds out with a foot on it. It is also long, heavy and awkward to ship, which makes freight damage the other common source of returns.

This guide is for accessory wholesalers, retailers, online sellers and companies building their own brand of side steps and running boards. It covers the main product types, how brackets decide both fit and strength, how to specify load tests when no single standard does it for you, coatings, the effect on vehicle width, and how to pack a product this size. For the wider picture on buying car accessories from Taiwan, Thailand and Malaysia, including importer liability, see our car accessory OEM guide.

💬 Looking for side steps for the models you sell? Send us your model list and we will find factories in Taiwan, Thailand and Malaysia that already hold the brackets. Ask about car accessories OEM.

Choose the product type before the factory

Tubular steps, extruded aluminium boards and powered steps are made by different factories with different skills, so decide the type first.

The three families sold in the aftermarket are below.

TypeHow it is madeStrengthsWatch for
Tubular step (round or oval tube)Bent and welded steel or stainless steel tube, with step padsStrong, simple, suits pickups and off-road stylingWeld quality, coating inside the tube, step pad fixing
Running board (flat board)Aluminium extrusion with a rubber or plastic tread, or a moulded plastic board on a metal frameWide standing area, factory-fitted lookExtrusion wall thickness, tread grip, end cap fixing
Powered or retractable stepMoving step with a motor, linkage and wiringFolds away when doors closeAn electrical product, subject to electrical and vehicle-wiring rules in most markets

This guide focuses on fixed steps and boards. A powered step adds a motor, a control unit and a connection to the vehicle’s wiring, which brings in electrical rules and a different kind of testing; treat it as a separate project.

Within each type, ask for the material grade and the wall thickness. Two aluminium boards can look identical in photos and carry very different loads because one has a thinner extrusion profile.

Brackets decide the fit and the strength

The bracket set is the model-specific part of a side step, and it is where both misfits and failures start.

The board or tube itself is often shared across several models in different lengths. What changes for each model is the bracket set that ties the step to the vehicle. When you ask a factory about its model coverage, you are really asking which bracket sets it holds.

Points to confirm for each model:

  • Mounting points: whether the brackets bolt to existing threaded points or holes in the body or chassis, or need drilling. “No-drill” is a strong selling point, but only if it is true for the version sold in your market.
  • Body construction: a body-on-frame pickup and a monocoque SUV offer very different mounting points. A bracket designed for one does not transfer to the other.
  • Clearances: door opening, sill trim, mud flaps, exhaust routing and the jacking points. A step that blocks the jacking point creates a problem the first time a tyre goes flat.
  • Version differences: wheelbase, cab type and trim levels can change the length of the step and the position of the mounting points.

Ask for the fastener grade, the bolt sizes and the tightening torque, and make sure the torque values appear in your fitting instructions. A correctly made bracket fitted with under-tightened bolts will still loosen.

Always fit a sample to a real vehicle of the market specification you sell. Bracket sets are the place where a factory’s compatibility list is most often too optimistic.

Load testing: write it into your specification

We found no single international standard for aftermarket side steps that settles the load question, so the test, the fixture and the pass criteria have to be agreed with the factory in writing.

Many factories have their own load test, and some publish a load rating. Before you repeat that rating on your listing, ask how it was obtained. A useful test specification answers these questions:

QuestionWhy it matters
Where is the load applied?A load at mid-span between brackets and a load at the end, beyond the last bracket, test different things
What is the load fixed to?A test on the board alone says nothing about the brackets; test the board with its bracket set on a fixture that copies the vehicle’s mounting points
Static only, or repeated?Repeated loading finds bracket and fastener fatigue that a single static load misses
What counts as a pass?Agree acceptable deflection under load and whether any permanent bend is allowed after the load is removed
Who tested, and is there a report?Ask for the report, photos of the setup and the date, and keep them with the specification

Set your own published load rating from the test, not from the factory’s catalogue, and state it clearly on the product page and in the instructions. If you sell a step for several models, the weakest bracket set sets the rating unless each set is tested.

Pre-shipment inspection should check the brackets and fasteners as closely as the board, including weld appearance, hole positions and the hardware count in each kit. Our note on pre-shipment inspection and AQL explains how sampling levels work; the method is the same whatever country the goods come from.

💬 Want the load test and the bracket fit checked before you commit? We arrange samples, agree the test with the factory and inspect before shipment. Send us your models.

Surface treatment and corrosion

Side steps sit in road spray and, in many markets, road salt, so specify the coating and how it will be tested rather than accepting “anti-rust” as a description.

Common finishes are:

  • Anodised aluminium: hard, corrosion-resistant surface; colour consistency between batches needs checking
  • Powder coating on aluminium or steel: durable if the pre-treatment is right; chips at sharp edges if it is not
  • Polished or brushed stainless steel: no coating to chip, but grade matters and tea-staining can appear in coastal areas
  • Chrome plating on steel: bright finish, but pitting starts at any defect in the plating

For coated metal, the usual laboratory check is a salt spray test to ISO 9227. The current edition, ISO 9227:2022, covers neutral, acetic acid and copper-accelerated acetic acid salt spray tests. The standard does not set the exposure period for a particular product or how to interpret results; that belongs in your product specification. It also states that salt spray tests are not intended for ranking different materials or for predicting long-term corrosion resistance. Use it to check that production keeps the quality of the approved sample, not as a promise of years of life.

The tread deserves the same attention. Ask what the rubber or plastic tread is made of, how it is fixed to the board, and how it performs when wet and after sun exposure. A tread that lifts at the ends or turns slippery when wet is a safety complaint, not a cosmetic one.

Vehicle width and the rules where you sell

A side step makes the vehicle wider, so confirm the current rule in the market where you sell, including whether the change has to be recorded.

Rules on vehicle dimensions, external projections and changes to a registered vehicle are national, and they can differ between passenger cars, pickups and vans. Ask your importer, customs broker or a vehicle inspection body for the current position, and keep the answer with the product specification.

Japan is one example we checked. The transport ministry’s list of designated parts names “pickup truck running boards” under the body-related heading; we did not find side steps for other vehicle types named on that list. A designated part fitted by a fixed method (bolted, not welded or riveted) does not count as a change to the dimensions recorded on the vehicle inspection certificate. For a part that is not on the list and is bolted or welded on, the notice treats it as no change only if the vehicle stays within ±2 cm of the recorded width (±3 cm in length, ±4 cm in height). In every case the vehicle must still meet the safety standards with the part fitted, and the list carries a note that body-exterior parts a pedestrian or cyclist could touch must not have sharp or pointed edges facing outward.

How the designated-parts notice works is explained in more detail in our guide to window louvres and rear spoilers. The practical point for side steps is that the step’s projection beyond the body line is a design decision you should make with the rules of your market in hand, not after the mould is made.

Packing and shipping a long, heavy product

Freight cost and transit damage are set by the carton design, so agree the packaging before the first order, not after the first damaged delivery.

Side steps are usually sold as a pair with a bracket kit. That makes a long, heavy carton that is charged on weight or volume and handled roughly by parcel networks. Points to settle with the factory:

  • each board or tube wrapped individually, with end protection where the corners take impacts
  • the bracket kit bagged and labelled by model inside the carton, with a hardware list that the inspector checks
  • carton strength suited to the shipping route, especially if your customers order online and the carton travels by parcel
  • the outer carton marked with the model coverage and your barcode, so warehouse staff do not open cartons to find the right kit

When you compare factories in different countries, include freight in the comparison. For a product this bulky, the landed cost can rank suppliers differently from the unit price. If you are also buying other accessories, consolidating several Asian suppliers into one shipment can make the freight easier to manage.

What drives cost and MOQ

Side step costs are set mainly by the material and profile, the number of bracket sets, and the coating.

We do not quote prices or minimum quantities before the product and the models are defined. These are the drivers:

DriverEffect
Existing bracket sets for your modelsStock items possible; new brackets mean new tooling, fixtures and testing
Material and profileAluminium extrusions need an extrusion die per profile; steel tube needs bending and welding fixtures
Coating and colourEach finish is a separate run; anodising and powder colours each add a line
Load testingEach bracket set you want rated needs its own test
PackagingLong custom cartons have their own print and size minimums

If you pay for a new extrusion die or bracket tooling, agree who owns it and where it is kept; our note on mould ownership agreements sets out the clauses that apply to any tooling.

💬 Ready to source side steps or running boards? See how our car accessories OEM service works, or send us your models and markets and we will match them to factories with the right brackets.

The groundwork is the same for every item: the fitment data the factory needs, what drives mould cost and packaging for online marketplaces.

Frequently asked questions

1. Aluminium or steel — which is better for side steps?
Neither is better in every case. Aluminium running boards are lighter and resist corrosion well; steel or stainless tube steps are strong and suit pickups and off-road styling. The load a step can carry depends more on the profile, the wall thickness and the brackets than on the material name, so compare tested samples.

2. How do I know what load a side step can carry?
Ask the factory how its rating was obtained: where the load was applied, whether the brackets were included, whether the load was repeated, and what counted as a pass. Then agree your own test in the specification and publish a rating based on that test.

3. Do side steps need drilling to fit?
Many bracket sets use existing mounting points and need no drilling, but this varies by model, version and market. Confirm it for the exact model code you sell and check it on a real vehicle before you advertise a product as no-drill.

4. Do I need approval to sell side steps?
It depends on the market. Side steps add width, and some countries control changes to a registered vehicle’s dimensions. In Japan, pickup truck running boards are on the transport ministry’s designated parts list, and other bolted-on parts are treated by whether the vehicle stays within ±2 cm of its recorded width. Confirm the current rule where you sell.

5. What should I send a factory first?
The model codes, years, cab or body type and market specification, the product type and material you want, the finish, your load and drilling requirements, and the rough quantity per model. Photos of the sill area and the underside where the brackets would mount help the factory check clearances.

Sources

Checked on 24 October 2026.