Make an informed repair decision
Genuine, OEM or compatible: compare spare parts
“OEM quality” in a listing does not establish a part’s origin or compatibility. Start with facts the seller can document for the particular item.
This guide was prepared with AI assistance using the sources listed below. It does not replace an inspection of your device. Method and limitations
Separate origin from condition
| Label | What to verify |
|---|---|
| Genuine part | A manufacturer listing or traceable authorised supply chain, plus the exact number and device compatibility. |
| OEM | Original Equipment Manufacturer. Sellers use the term in different ways: who actually made the item being offered? |
| Compatible / aftermarket | Another supplier’s part intended for specified devices. Compatibility and technical properties still need evidence. |
| Used / refurbished | Describes condition, not original brand. Ask about prior use, testing, wear and returns. |
Five questions that make offers comparable
- Which complete device model is explicitly supported?
- Who made the part and who sells it? Is the part number traceable?
- What is included: a single component, assembly, frame, seals or fixings?
- Which functions or characteristics may differ? For a screen, check display technology, touch and brightness; for a battery, specification and quality checks.
- Does installation require testing, programming or calibration, and who will perform it?
Use evidence rather than blanket quality claims
Samsung’s Self Repair service directs users to genuine parts for supported products; LG identifies an authorised parts distributor. These are traceable purchasing routes, not approval for every device variant. A genuine part can still be the wrong one.
iFixit explains how it tests the batteries it sells. That describes one supplier’s stated testing process, not the quality of every aftermarket part. Likewise, “Incell” and “OLED” are not interchangeable display technologies. A change in display technology should be considered explicitly.
Compare the complete cost
Include shipping, labour, extra materials and the risk of needing a second attempt. For safety-related components or unclear origin, a workshop quote with confirmed compatibility is more useful than a low part price alone. The condition of the rest of the device matters too.
Sources and further information
Sources checked on 9 September 2026. Manufacturer guidance and specialist repair sources support the examples; they do not approve a part or repair for your particular device.
Examples from the repair library
Samsung Galaxy A16 4G, probably SM-A165M / SM-A165M-DS
Samsung Galaxy A16 4G: Replacing the display
Samsung Galaxy A16 4G: Replacing the display. Samsung lists SM-A165M as an official support model. No specific Samsung replacement-screen number is confirmed here for this Galaxy…
LG Electronics OLED48A29LA
LG OLED48A29LA: OLED panel failed – repair or replace?
LG OLED48A29LA: OLED panel failed – repair or replace?. Panel number EAJ65808801 remains unconfirmed for LG OLED48A29LA. LG establishes the TV model and identifies an authorised…
Make an informed repair decision
Identify your device, check the part and choose a suitable repair route.
Find your model number and rating plate
Find the model number, distinguish it from a serial or part number and take a readable label photo for appliances, phones and power tools.
Check a spare part number before you buy
Check the model suffix, component position, part number and included items. Learn why finding your device does not prove that a replacement part fits.
When should a professional handle the repair?
Recognise DIY limits around electricity, batteries, heat and pressure. Prepare the model, symptoms and questions needed for a useful repair estimate.