When it comes to maintaining your car, choosing the right replacement part can feel overwhelming. Should you go for genuine parts from the dealership, OEM parts from the original manufacturer, or aftermarket alternatives?
At Run Auto Parts, we specialise in supplying high-quality OEM car parts because they strike the perfect balance between quality and value. But before you decide, let’s break down the differences.
Genuine Car Parts
Genuine car parts are parts supplied by your car’s manufacturer and sold through dealerships. They’re the exact same parts that came fitted in your vehicle when it rolled off the production line.
Pros:
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Guaranteed exact fit and compatibility
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Maintains factory performance and reliability
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Often required to keep your car’s warranty valid
Cons:
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Usually the most expensive option
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Limited availability outside dealerships
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You’re often paying extra for the manufacturer’s branding rather than a difference in quality
👉 Best choice if: Your vehicle is still under warranty or you need rare, model-specific parts.
OEM Car Parts (Original Equipment Manufacturer)
OEM parts are made by the same company that manufactures genuine parts — just without the car brand’s logo. For example, Bosch, Mann-Filter, and Stabilus are trusted OEM suppliers.
Pros:
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Identical quality and performance to genuine parts
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Lower price than dealer-supplied genuine parts
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Widely available through suppliers like Run Auto Parts
Cons:
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Packaging won’t carry the car brand logo
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Some drivers still assume “genuine” is superior, even though the part is the same
👉 Best choice if: You want the same part your dealer would sell, but at a better price.
Aftermarket Car Parts
Aftermarket parts are produced by third-party manufacturers not linked to your car’s original brand. Quality can range from excellent to poor, depending on the supplier.
Pros:
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Usually the most budget-friendly option
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Huge variety available, sometimes offering upgraded designs or features
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Good option for older vehicles where cost is more important than brand alignment
Cons:
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Quality can vary — from excellent to unreliable
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Incorrect fitment is more common
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May not last as long as OEM or genuine parts
👉 Best choice if: You’re repairing an older car or working on a budget, but always research the manufacturer.
At-a-Glance Comparison
| Type | Supplier | Quality | Price | Best For |
|---|---|---|---|---|
| Genuine | Dealership (branded) | Excellent | $$$ | Newer cars, warranty protection |
| OEM | Original manufacturer (e.g. Bosch, Stabilus) | Excellent | $$ | Everyday drivers, quality + value |
| Aftermarket | Third-party manufacturer | Variable | $ | Older cars, budget-conscious repairs |
Which Car Parts Should You Choose?
Here’s a quick guide to help:
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Genuine parts: Perfect for newer vehicles, warranty concerns, or rare parts.
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OEM parts: The best quality-to-price ratio — and our speciality at Run Auto Parts.
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Aftermarket parts: Suitable for older cars or budget repairs, but requires careful brand selection.
At Run Auto Parts, we stock a wide range of OEM parts from trusted brands like Bosch, Mann-Filter, Mahle, and Stabilus. That way, you get the quality of genuine parts without paying dealership prices.
Frequently Asked Questions
Are OEM parts as good as genuine parts?
Yes. OEM (Original Equipment Manufacturer) parts are made by the same companies that produce genuine parts for dealerships. The only difference is the packaging and branding — the part itself is identical in quality and fit.
Will using aftermarket parts void my car warranty?
Not always, but it depends. Using high-quality aftermarket or OEM parts that meet manufacturer specifications typically won’t void your warranty. However, if a part fails and causes damage, a dealer may reject the claim. For newer cars, stick with genuine or OEM parts for peace of mind.
Why are genuine parts more expensive than OEM parts?
Genuine parts are often the same as OEM parts but sold through dealerships with the car maker’s logo and packaging. The higher cost reflects branding and distribution rather than better quality.
Are aftermarket parts always poor quality?
No. Some aftermarket brands produce excellent components, sometimes even improving on the original design. The key is to research the brand — quality varies significantly between suppliers. Reputable names like Bosch, Mahle, and Mann-Filter are safe choices.
How do I know which type of part is right for me?
- Genuine parts – Best for newer cars, warranty protection, or rare components.
- OEM parts – Offer the same quality as genuine parts at a lower cost; ideal for most drivers.
- Aftermarket parts – Great for older cars or budget repairs; choose trusted brands only.
Where can I buy OEM parts online?
Run Auto Parts specialises in OEM car parts from trusted manufacturers such as Bosch, Mann-Filter, Mahle, and Stabilus — delivering the same quality as genuine parts, without the dealership price tag. All parts are sourced from authorised Australian distributors.
Ready to Shop?
Understanding the difference between genuine, OEM, and aftermarket car parts helps you make smarter decisions for your vehicle. While genuine parts offer peace of mind and aftermarket options save money, OEM parts provide the perfect middle ground — delivering original quality at a better price.
✅ Shop OEM car parts today at Run Auto Parts and enjoy the same quality your car was built with, for less.
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