Adhering to your budget is a foundational skill required to run any operation successfully. When it comes to the parts you use, whether it’s for updating or replacing your current equipment, you want to make sure they hit two key points:
- The purchase is cost effective and budget friendly
- The part will help to improve or maintain efficiency
Your decision to purchase parts and products should be based on the two points above, particularly when you weigh the options of choosing between OEM parts and aftermarket products.
What are OEM products?
OEM, or “original equipment manufacturer,” products are those that originate directly with the manufacturer of your equipment and are identical to the products or parts you’re replacing. OEM products are new and are created with the same materials and consideration the original pieces were.
On the other side of the spectrum you have aftermarket products, which are manufactured by a third-party company and not the original manufacturer. These products and parts are intended to serve a similar function as the piece being replaced; however, due to the nature of aftermarket parts, it can be difficult to ensure that you are going to get the same kind of quality or functionality as the original piece. Therein lies the innate advantage of selecting OEM parts over aftermarket ones.
Choosing OEM over aftermarket
One of the more popular reason to choose an aftermarket product over an OEM one has to do with cost. As a general rule, aftermarket parts are usually much less expensive, which seems like a great idea when you’re on a budget. The problem with that is the lack of a guarantee—for quality, fit, or function.
OEM vs Aftermarket Parts: A Side-by-Side Comparison
Before you weigh the trade-offs paragraph by paragraph, here’s how OEM and aftermarket parts stack up across the factors that matter most when you’re making a purchasing decision.
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Upfront price |
OEM: Higher initial cost. Aftermarket: Usually much cheaper up front, which is the main reason operators consider it. |
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Fit & specification match |
OEM: Identical dimensions and specifications to the part being replaced — guaranteed to fit. Aftermarket: Designed to serve a similar function, but fit and tolerances can vary between suppliers. |
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Quality control standard |
OEM: Built and tested under the same rigorous manufacturer standards as the original component. Aftermarket: Quality depends entirely on the third-party maker and is not guaranteed to match the original. |
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Typical service life |
OEM: Engineered to factory specs, so it tends to last longer and won’t introduce undue wear on surrounding components. Aftermarket: May wear faster or unevenly if materials or tolerances differ from the original. |
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Warranty |
OEM: Most OEM parts carry at least a 1-year warranty (varies by manufacturer and product). Aftermarket: Coverage varies widely — reputable brands offer warranties, but many parts carry little or none. |
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Manufacturer support |
OEM: Direct access to the manufacturer’s support network — people who know the equipment and the part firsthand. Aftermarket: Support is limited to the part supplier, who may know the component but not your equipment. |
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Lead time & availability |
OEM: Generally reliable through the manufacturer, though some parts can be backordered or discontinued on older equipment. Aftermarket: Often more widely stocked, which can be an advantage when an OEM part is unavailable. |
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Cost over equipment lifetime |
OEM: Higher upfront, but fewer replacements and less collateral wear typically mean lower total cost of ownership. Aftermarket: Lower upfront, but repeat replacements plus downtime and labor can cost more over the life of the equipment. |
OEM products are going to match what’s being replaced and that guarantees function and quality. You’ll be getting the same performance you expect and need from your equipment with an OEM replacement part because it was designed and tested under the same rigorous manufacturer standards. This means OEM products guarantee compatibility (dimensions and specifications) and are high quality.
Picture a wear part where the OEM version costs more up front than the aftermarket equivalent. On paper, the aftermarket part looks like the obvious budget choice. But the purchase price is only one line in the total cost.
The OEM part is built to factory specifications, so it runs its full expected service life before it needs replacing. The aftermarket equivalent, if its materials or tolerances don’t match the original, may need to be swapped out several times over that same period. Every one of those swaps carries costs beyond the part itself:
- Labor — the crew time to pull the old part and install the new one.
- Downtime — production lost while the machine is offline for the change-out.
- Collateral wear — a part that isn’t a precise match can accelerate wear on the components around it, quietly adding to future repair bills.
Run that out over the equipment’s lifespan and the arithmetic often flips: one OEM part installed once can total less than the same aftermarket part bought two, three, or more times over — before you even count the repeated labor and downtime. That’s why OEM parts are best understood as an investment rather than a line-item expense. The higher sticker price buys you fewer change-outs, less unplanned downtime, and a longer operational life for the equipment itself.
The point isn’t a fixed dollar figure — your numbers depend on the part, your labor rates, and how much a stopped machine costs your operation. The point is to do this math for your own situation before assuming the cheaper part is the cheaper decision.
OEM parts offer reliability that extends beyond compatibility and quality
When you purchase OEM products, you’re also gaining access to the manufacturer’s network of support, something you may otherwise lack with aftermarket parts. This helps to ensure you can get your questions answered by someone who knows the equipment and the parts firsthand, rather than someone familiar with the replacement part but only passably knowledgeable about the equipment itself.
You may also be able to expect support in the form of a manufacturer’s warranty, as most OEM parts include at least a 1-year warranty (although this varies between manufacturers and products). In many cases, if your part shipped with defects or is faulty, the manufacturer is usually happy to replace the part for you.
When Aftermarket Parts Are Actually the Smarter Choice
OEM is the right call most of the time, but not every time. Being honest about that is part of running a cost-effective operation. Here are the situations where a quality aftermarket part can be the sensible decision.
Equipment near the end of its life
If a machine is close to retirement, paying a premium for an OEM part that will outlive the equipment rarely makes financial sense. A reputable aftermarket part can carry it through its remaining service without over-investing.
The OEM part is discontinued or backordered
When the original manufacturer no longer produces a part, or a critical component is on a long backorder, a well-made aftermarket equivalent can keep you running instead of leaving a machine idle waiting on stock.
Non-critical or cosmetic components
For parts that don’t bear heavy loads or affect precision — guards, covers, and similar low-stress items — the tighter tolerances and testing behind OEM matter far less, and a quality aftermarket part will do the job.
Reputable brands with comparable warranties
Not all aftermarket is created equal. Established aftermarket manufacturers that publish material specifications and back their parts with warranties comparable to OEM narrow the risk gap considerably.
How to vet an aftermarket supplier
Before you buy, check for published material and dimensional specs, relevant certifications, a clear return policy, and a warranty in writing. If a supplier can’t provide those, the low price isn’t worth the gamble on a critical part.
For large operations or projects that require expensive equipment, you want to make sure you handle them with care. If you don’t, repairs can be costly. It’s for this reason that we feel OEM parts are typically the best option for maintaining your equipment as they ensure the fewest number of mechanical problems and won’t harm the operational life of your equipment. All of this means saving money and maintaining operational efficiency to see you through to the end of your project on schedule and on budget.