OEM vs. Aftermarket Parts: Which Should You Choose?
When your vehicle has been involved in an accident, one of the first and most critical decisions you'll face is the type of replacement parts to use: Original Equipment Manufacturer (OEM) or aftermarket. This choice is far from trivial, as it can profoundly impact various aspects of your car, including its safety, overall performance, future warranty coverage, and even its potential resale value. Understanding the distinctions between these two options is crucial for making an informed decision that best serves your vehicle's longevity and your peace of mind. At Adesa Auto Body, a trusted auto body shop in Boise, Idaho, we often get this question from customers who want to make the best decision for their vehicle and their wallet. Understanding the difference between OEM vs. aftermarket parts is essential for anyone facing a repair, whether you're dealing with a minor fender bender or significant collision damage. We’ll walk you through the advantages and disadvantages of each to help you decide what’s right for your vehicle.
What Are OEM Parts?
Original Equipment Manufacturer, or OEM, parts are exact replicas of the components your car was built with. They are sourced directly from the manufacturer that originally produced your vehicle's parts..
Benefits of OEM Parts:
Guaranteed Fit: OEM parts are made to perfectly fit your specific vehicle make and model.
Manufacturer Quality: They are made to meet the strict standards of the original carmaker.
Warranty Protection: OEM parts usually include a warranty and can help ensure your factory coverage remains intact.
OEM parts tend to cost more, but they’re ideal if you want peace of mind and assurance that your vehicle is restored to virtually factory condition.
What Are Aftermarket Parts?
Aftermarket components are built by third-party manufacturers, not the original carmaker. They’re intended to replicate OEM parts in fit and function, though their quality, cost, and availability can differ.
Pros of Aftermarket Parts:
Cost-Effective: Typically cheaper than OEM parts—sometimes significantly.
Readily Available: More likely to be in stock and widely distributed.
Variety of Options: Multiple manufacturers mean you can choose based on price, performance, or material. However, with so many aftermarket manufacturers, quality can be hit-or-miss. In most cases the aftermarket part will be far inferior to the OEM in quality.
Comparing OEM vs. Aftermarket Parts
Let’s break down how these two types of parts stack up across the categories that matter most.
Price
Aftermarket: Usually more affordable, making them attractive to budget-conscious customers or for older vehicles.
OEM: Parts often come at a premium because of their consistent production standards and brand reputation.
Quality & Fit
OEM: Consistency and precision—since they’re made by the carmaker, they fit perfectly. They are made with high quality materials.
Aftermarket: Quality varies. Some parts may not fit exactly or require modifications during installation. Quality standards are low and in almost all cases aftermarket parts are not crash tested.
Warranty Implications
OEM: May be required to maintain your vehicle’s factory warranty.
Aftermarket: Could potentially void your warranty if deemed incompatible by the manufacturer.
Insurance Coverage
Aftermarket: Many insurance companies prefer aftermarket parts to reduce claim costs. They may not automatically approve OEM parts unless requested.
OEM: Some insurers will cover OEM parts, but you may need to pay the difference or have a special policy rider.
Resale Value
OEM: Helps preserve your vehicle’s resale value. Buyers appreciate knowing factory parts were used in repairs.
Aftermarket: Depending on the part quality, resale value may decrease if inferior components were used.
Availability
Aftermarket: Easy to find and quickly delivered, which can speed up the repair process.
OEM: May need to be special-ordered, increasing downtime if your vehicle is in the shop.
Which One Should You Choose?
Your best option will vary based on your goals, financial situation, and how old your car is.
Use OEM parts if:
- Your car is still under warranty
- You drive a luxury or leased vehicle
- You prioritize safety, precision, and longevity
- You want your vehicle to be repaired as close as possible to pre-accident condition
Use Aftermarket parts if:
- You’re repairing an older car
- Budget is a primary concern
- OEM parts are no longer available
While OEM parts are known for their reliability, safety, and performance, aftermarket alternatives provide potential cost savings for you or your insurer. The key is to understand your choices and collaborate with a knowledgeable shop that can provide expert advice.
Why It Matters Where You Get Your Parts Installed
Even the best parts can underperform if they’re installed incorrectly. Fit and performance aren’t just about the part itself—they also depend on the technician installing them. At Adesa Auto Body, our experienced team ensures that every component is properly aligned, calibrated, and secured. We use OEM parts and manufacturer repair guidelines for your car because we believe that safety comes before cost. We’re a trusted auto body shop in Boise, Idaho, with I-CAR Gold class training and technicians with over 75 years of auto body experience. We don’t just throw parts on your car and call it a day. We diagnose, repair, and test everything to ensure your vehicle looks and drives like new—no shortcuts, no compromises. If you have any questions about what parts should be on your vehicle after a collision, give us a call at 208-395-3135 or visit our website at https://adesaautobody.com/. Drive safe friends!