Should You Use OEM or Aftermarket Trailer Parts?
When it comes to maintaining trailers, whether part of a commercial fleet or a single long-haul unit, choosing the right parts is essential. Every component — from slack adjusters and brake chambers to suspension parts and tyres — plays a role in safety, compliance, and performance.
If you’re working with a truck parts supplier, one question is bound to come up sooner or later: should you use OEM (Original Equipment Manufacturer) parts or aftermarket alternatives when it comes to trailer parts?
This article explores the pros and cons of both options to help you make informed decisions. Whether you're handling routine maintenance or unexpected repairs, the right parts can help ensure your trailers stay roadworthy and efficient — without overcomplicating your buying process.
What’s the Difference Between OEM and Aftermarket?
OEM parts are manufactured by the same company that produced the original part used in your trailer’s factory build. These components are made to match the original specifications and are typically guaranteed for fit and function.
Aftermarket parts, on the other hand, are produced by third-party manufacturers. They may be designed to replicate or improve upon the OEM design and can vary in quality, material, and price.
Both options are widely available through most truck parts suppliers, and depending on your needs, either could be a valid choice.
Benefits of Using OEM Trailer Parts
1. Consistent Quality and Fit
OEM parts are built to exact specifications of the original component, which means they’re more likely to fit properly and function as expected. This consistency can make installations smoother and reduce errors.
2. Easier Sourcing Through Certified Suppliers
Reputable truck parts suppliers often stock OEM parts for common brands and trailer configurations. This makes reordering familiar components simple, especially for fleets that prioritise uniformity.
3. Maintains Equipment Warranty
In some cases, using non-OEM parts may affect the warranty of your trailer or system. OEM replacements typically align with warranty terms, offering peace of mind.
4. Better Long-Term Value
While upfront costs can be higher, OEM trailer parts may last longer and offer better reliability over time. This is particularly important for critical safety systems like suspension parts, and brake chambers.
Where Aftermarket Trailer Parts Fit In
1. Lower Initial Cost
One of the main reasons buyers consider aftermarket options is affordability. For certain non-critical components or wear items, cost-effective alternatives can help manage fleet maintenance budgets.
2. More Availability
Some truck parts suppliers may offer a broader variety of aftermarket parts, especially for older trailers or less common configurations.
3. Flexible Options
Certain aftermarket manufacturers provide performance enhancements or materials not found in the OEM part — which might appeal to specific use cases or conditions.
That said, not all aftermarket parts are created equal. While some perform just as well as OEM, others may cut corners on material or quality control.
Which Parts Are More Sensitive to Choice?
In safety-critical systems like slack adjusters and brake chambers, using OEM parts may be a safer bet. These components affect braking performance and regulatory compliance. Inconsistencies in fit or function could create real risks.
Suspension parts also fall into this category. When improperly matched, they can lead to uneven tyre wear, handling issues, and even breakdowns.
In contrast, parts like lighting, handles, or cosmetic panels may offer more flexibility when considering aftermarket options.
What Should You Ask Your Truck Parts Supplier?
A good supplier won’t just sell you parts — they’ll help you make decisions. When choosing between OEM and aftermarket, consider asking:
• Is this part critical to safety or performance?
• Does this part come with a warranty?
• Have other customers had success with this aftermarket option?
• Will using this void any existing warranties on my trailer?
Suppliers familiar with truck and trailer parts should be transparent about quality, fitment, and performance feedback.
How to Decide What’s Right for You
Every fleet is different. A high-mileage interstate haulier might benefit from OEM reliability, while a local delivery operator may prefer aftermarket cost savings for easily replaced components.
If you're unsure, a general rule of thumb is:
• Use OEM for brakes, suspension, and drivetrain
• Consider aftermarket for accessories, lighting, and bodywork
In all cases, working with a knowledgeable truck parts supplier who understands your business and equipment is the key to making smart, safe, and cost-effective choices.
Conclusion
There’s no one-size-fits-all answer when it comes to choosing between OEM and aftermarket trailer parts. Both have a place in modern truck and trailer maintenance — but understanding the implications of each helps you make better decisions based on safety, cost, and performance.
Leaning toward OEM parts for critical systems like slack adjusters, brake chambers, and air brakes can provide added peace of mind. At the same time, aftermarket solutions can be a valuable tool when used strategically and with quality assurance in mind.
Frequently Asked Questions (FAQ)
Are OEM parts always better than aftermarket parts?
Not always — some aftermarket parts are high quality and work just as well. But OEM parts tend to offer more consistent reliability, especially in safety-critical systems.
Can I mix OEM and aftermarket parts on the same trailer?
Yes, but be cautious. For connected systems (like brake chambers and slack adjusters), it's often best to use matched components to avoid performance differences.
Is it true that using aftermarket parts voids my warranty?
It depends on the warranty terms. Using non-OEM parts in specific systems might affect your coverage, so always check with the equipment manufacturer.
What are signs of poor-quality aftermarket parts?
Inconsistent fit, lack of certification, missing warranty information, or low-grade materials can all be red flags. Work with trusted suppliers to avoid these risks.
Should I use OEM parts for electric trailers or EVs?
Yes, due to the integrated nature of E-Vehicles, OEM parts are generally recommended to maintain system compatibility and safety.
