Hello, I’m William — a professional exporter of genuine BYD, Geely, Changan, Chery, and Haval parts from China.
If you’ve ever searched for BYD OEM parts, you’ve probably seen terms like “OE equivalent” or “aftermarket” in supplier catalogs.
But what do these terms actually mean, and how do they affect quality, price, and reliability?
Let’s break them down clearly — and I’ll also explain how my supply chain keeps things transparent for my global clients.

1️⃣ What “OEM” Means in the BYD World

OEM stands for Original Equipment Manufacturer — the same company that produces the part for BYD’s assembly line.
These parts are identical to what’s installed in your car at the factory.

✅ Same material, performance, and lifespan.
✅ Supplied under BYD’s official contracts or quality control.
✅ Most reliable choice for safety and warranty.

In William’s network, OEM parts come directly from BYD’s Tier-1 suppliers — not resellers. Each item is verified with:

• BYD or supplier logo and packaging,

• OEM part number (e.g., 1014010-00Q),

• clear traceability and production batch code.

2️⃣ What “OE Equivalent” Means

OE Equivalent (or OEM Quality) parts are made by the same factories or qualified subcontractors, but sold outside the official BYD channel.

They offer 90–95% identical quality but cost 10–30% less.
For workshops, this is the best balance between cost and performance — especially when warranty coverage isn’t critical.

William’s OE-equivalent sources are vetted through long-term supplier audits, ensuring they meet:

• identical production standards,

• ISO/TS certification,

• and compatibility with OEM specifications.

3️⃣ What “Aftermarket” Parts Mean

Aftermarket parts are produced by independent manufacturers — not connected to BYD or its OEM network.
Quality varies widely: some brands are excellent, others poor.

They can be useful for:

• Budget repairs,

• Older vehicles out of warranty,

• Non-critical components (e.g., mirrors, bumpers, filters).

However, for electronics or powertrain parts (like ECU, BCM, or hybrid drive modules), William strongly recommends OEM or OE-equivalent only.

4️⃣ How William’s Supply Chain Keeps It Clear

Over the last decade, I’ve built a verified sourcing network covering:

• OEM parts directly from BYD’s certified suppliers,

• OE-equivalent components from audited secondary suppliers,

• Premium aftermarket parts tested for consistent reliability.

Each quotation clearly states which category the part belongs to — no hidden substitutions, no fake packaging.

And yes, I still answer every client directly through WhatsApp: +86 18669778647 — because transparency isn’t just a slogan; it’s how we do business.

5️⃣ Final Advice for Global Buyers

Before you order any BYD part, ask your supplier three simple questions:

1. Is this OEM, OE equivalent, or aftermarket?

2. Can you show the supplier or batch origin?

3. Is the part verified with an OEM code or photo?

If your supplier can’t answer, don’t risk it.
If you need clear, verified sourcing — message William on WhatsApp +86 18669778647 and get a transparent quotation with documentation.