OEM (Original Equipment Manufacturer) parts are designed, tested, and manufactured according to brand standards (based on Apple’s public data); aftermarket parts are lower in price, with some offering an experience close to that of the original (based on public industry data). Screens are categorized into multiple tiers: OEM, “Original Factory” (service parts), aftermarket, assembled, and “refurbished/re-glassed” (based on public industry data).
This article outlines the differences between OEM and aftermarket parts based on public data from 2026.
I.
Overview of Differences: OEM vs. Aftermarket
- OEM: Designed and tested to brand standards (based on Apple’s public data).
- Aftermarket: Produced by third parties (based on public industry data).
- “Original Factory” Parts: Parts used for after-sales replacement (based on public industry data).
- Pulled Parts: OEM parts removed from used devices (based on public industry data).
- Price Difference: Aftermarket parts can be as low as half the price (based on public industry data).
- Warranty: Aftermarket parts come with a warranty (based on public industry data).
- Compatibility: Aftermarket compatibility varies (based on public industry data).
II.
Screen Classification
- OEM Screen: Original screen from the factory-new device (based on public industry data).
- “Original Factory” Screen: After-sales replacement part (based on public industry data).
- Aftermarket Screen: Produced by third parties (based on public industry data).
- Assembled Screen: Fully manufactured by third parties (based on public industry data).
- Re-glassed Screen: Original panel with a new cover glass pressed on (based on public industry data).
- Modified/IC-Transferred Screen: Refurbished using existing components (based on public industry data).
- Quality Ranking: OEM > “Original Factory” > High-end Domestic > Re-glassed (based on public industry data).
III.
Battery Comparison
- “Original Factory”: 1700mAh, 140 Yuan (based on public industry data).
- Third-party: 1900mAh, 60 Yuan (based on public industry data).
- Capacity: Third-party options offer higher capacity (based on public industry data).
- User Experience: No pop-up warnings or error messages (based on public industry data).
- Certification: Fully certified (3C/CE) (based on public industry data).
- Safety: Certified for air travel (based on public industry data).
- Warranty: Also provided by third-party manufacturers (based on public industry data).
IV.
Quality Differences
- Original: Strict design, testing, and safety certification (based on Apple’s public data).
- Third-party: Inconsistent manufacturing quality (based on public industry data).
- Refurbished/Re-bonded Screens: Touch issues and unstable quality (based on public industry data).
- Third-party Screens: May lack fingerprint sensors (based on public industry data).
- Image Quality/Brightness: Third-party screens may be dimmer (based on public industry data).
- Build/Gaps: Third-party parts often have rougher finishes (based on public industry data).
- Durability: Questionable for third-party parts (based on public industry data).
V.
How to Identify
- Brand Verification: Look for genuine Apple markings (based on Apple’s public data).
- Watch Out for Wordplay: A specific brand name does not equal the phone manufacturer’s brand (based on public industry data).
- Teardown Comparison: Compare against original parts (based on public industry data).
- White Light Transmission: Uniform vs. scattered light (based on public industry data).
- Lamination Quality: Even vs. uneven edges (based on public industry data).
- Surface Texture: Watermarks or indentations indicate re-bonded glass (based on public industry data).
- Adhesive Marks: Traces of factory-applied bracket adhesive (based on public industry data).
VI.
Selection Advice
- Core Components: Prioritize original parts (based on public industry data).
- Limited Budget: Consider high-end third-party options (based on public industry data).
- Batteries: Certified third-party models offer good value (based on public industry data).
- Screens: Choose screens that come with a warranty (based on public industry data).
- Teardown Parts: Require careful inspection (based on public industry data).
- Warranty terms: Similar coverage applies to aftermarket parts (based on public industry data).
- Trend outlook: 2026 aftermarket part upgrades—fully certified, high-capacity options are emerging (based on public industry data).
VII.
FAQ
- Difference between OEM and aftermarket: Price is roughly half; quality differences lie in manufacturing craftsmanship (based on public industry data).
- Are aftermarket parts usable?
Certified versions offer a user experience close to the original (based on public industry data). - How to identify OEM parts: Brand verification and build quality details (based on public Apple data).
- Is a “factory screen” the same as an OEM screen?
Not necessarily; replacement parts used in repairs may vary (based on public industry data). - Are aftermarket batteries safe?
Safe if they hold 3C/CE certification (based on public industry data). - Should I buy “refurbished/re-glassed” screens?
Cheap, but quality is inconsistent (based on public industry data). - How to avoid pitfalls: Disassemble and compare;
check warranty terms (based on public industry data).
VIII.
Advice for Overseas B2B Part Sourcing
- Prioritize OEM: Ensures quality for core components (based on public Apple data).
- Verify aftermarket certifications: 3C, CE, FCC (based on public industry data).
- Sample comparison: Teardown analysis of OEM vs. aftermarket parts (based on public industry data).
- Warranty terms: Include in the contract (based on public industry data).
- Supplier qualifications: Ensure they are legitimate manufacturers (based on public industry data).
- Trend outlook: 2026 sourcing divergence—using OEM for core components and aftermarket for consumables is becoming the mainstream strategy (based on public industry data).
