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Which is better, OEM or authentic?

In most cases, OEM and “authentic” parts refer to genuine, factory-grade components designed for your vehicle; they typically offer the best fit and reliability, though the exact meaning can vary by brand and retailer.


Clarifying the terms: what OEM and authentic usually mean


OEM stands for Original Equipment Manufacturer. These parts are produced by the same company that built your vehicle or by an approved supplier under contract to the original maker. “Authentic” is a label used by some retailers to indicate genuine branding, but its meaning can differ between brands and markets. In practice, many brands consider OEM and authentic to be interchangeable, though not all “authentic” parts are guaranteed to come through official channels.


Are OEM and authentic the same?


Often they aim to be, with both types designed to meet the vehicle’s precise specifications. However, the sourcing can differ: authentic/genuine parts are typically sold through authorized dealers or official channels, while some retailers may label parts as authentic even when their origin is less clear. Always verify the seller’s authorization and part numbers to ensure compatibility.


Warranty and safety considerations


Genuine/OEM parts installed through official channels often carry the vehicle maker’s warranty and alignment with safety standards. Counterfeit or poorly sourced “authentic” parts can compromise performance and safety. If reliability and resale value matter, buying through trusted, authorized sources reduces risk.


Practical differences: cost, availability, and performance


The following points summarize the typical trade-offs you’ll encounter when choosing between OEM and authentic/genuine parts versus alternatives.



  • Fit and performance: OEM/authentic parts are designed specifically for your vehicle model and trim, ensuring precise fit and expected performance.

  • Warranty and service coverage: Parts purchased through official channels often align with the vehicle’s warranty terms and approved service networks.

  • Price and value: OEM/authentic parts tend to be more expensive than many aftermarket options, though quality can justify the higher price for critical components.

  • Availability: OEM parts are readily available through dealerships and official distributors; reputable aftermarket options can fill gaps for older or less common vehicles.

  • Counterfeit risk: Buying from unauthorized or dubious sellers increases the risk of counterfeit parts, particularly online. Always verify source credibility and part numbers.


In practice, if you prize guaranteed fit, official warranty, and long-term reliability, OEM or genuine parts are usually the safer bet. If cost is a major constraint and you choose reputable sources, high-quality aftermarket or authentic-labeled parts can be appropriate for non-critical applications.


How to decide for your vehicle


Use these steps to determine the best choice for your situation and vehicle.



  1. Check your warranty: If the car is still under factory coverage, OEM/genuine parts may be required to keep the warranty intact.

  2. Source reliability: Buy from authorized dealers, official OEM parts websites, or trusted automotive shops with verified supplier credentials.

  3. Compare prices: Obtain quotes for OEM/genuine parts and compare them with reputable aftermarket options for the same part number and quality level.

  4. Consider the part’s importance: Structural, safety-critical, or high-wear components typically merit OEM/genuine parts; cosmetic or non-critical items may be suitable for high-quality aftermarket replacements.

  5. Verify compatibility: Confirm part numbers and compatibility with your VIN, and read verified reviews or installation notes for real-world fitment.


By weighing warranty implications, sourcing reliability, cost, and the criticality of the part, you can choose the option that best fits your vehicle and budget.


Summary


OEM and authentic parts are often the same in practice: they are factory-grade components designed for your vehicle, offering reliable fit and warranty when purchased through proper channels. The main differences tend to be sourcing, branding, and price, with counterfeit risks crept in when parts are bought from questionable sources. For peace of mind and long-term value, prioritize official or authorized channels, verify part numbers, and balance cost against the need for reliability and safety.

Are OEM parts better than original?


The short answer: Not usually. OEM parts aren't necessarily better, nor are aftermarket replacements necessarily worse. Some are built to the same quality and specs as the factory-original part. Some are even made by the same suppliers but sold under the supplier's brand or other private label.



What is the difference between OEM and authentic?


Original Equipment Manufacturer (OEM) parts are built by the company that initially made the parts for the auto manufacturer. Our OEM parts are precisely the same as those that came with your car. The difference is that they don't carry the manufacturer's logo.



What is higher than OEM?


Generally, OE parts tend to be more expensive than OEM parts due to the branding and packaging by the manufacturer. However, both types maintain high quality and performance standards. Choosing between the two often comes down to cost preference and brand loyalty.



What is the disadvantage of OEM?


A drawback of OEMs is the amount of resources needed to produce a unique product. This can include research and development costs, as well as the time it takes to create the design before it's ready for manufacturing. These investments can be quite high and introduce a certain level of risk to a business.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.