🔧OEM vs Aftermarket Parts Savings Calculator

Enter the OEM part price and replacement frequency to see your savings from aftermarket alternatives.

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How Much Can Aftermarket Parts Save You?

OEM parts carry a significant premium for the brand name. Aftermarket parts from reputable manufacturers often meet the same specs at 30–65% lower cost. For frequently replaced consumables like air filters, oil filters, brake pads, and wiper blades, the savings add up fast.

Over a 5-year period, switching to quality aftermarket parts for routine maintenance on a foreign luxury vehicle can save $1,000–$3,000 compared to using dealer-only OEM parts. The key is choosing certified, brand-name aftermarket parts — not the cheapest no-name option.

Typical Savings by Part Category

Part TypeOEM Avg.Aftermarket Avg.
Air filter$35–$80$15–$35
Brake pads (pair)$80–$200$30–$90
Alternator$300–$600$100–$200 (reman)

Frequently Asked Questions

Which parts should always use OEM?

Safety-critical parts like airbags, ABS sensors, seatbelt mechanisms, and structural components should use OEM or equivalent certified parts. The cost savings are not worth the risk on these items.

How do I find a reputable aftermarket brand?

Look for brands that supply to original automakers (called Tier-1 suppliers): Bosch, Denso, Continental, Delphi, Aisin, Monroe, KYB. These often make the same part sold under the OEM brand name.

Does using aftermarket parts affect resale value?

For most vehicles, quality aftermarket maintenance parts have no significant impact on resale value. However, keeping records showing the parts were from reputable brands can reassure future buyers.