Brake friction parts are the most safety-critical component you will ever purchase for a commercial vehicle. A wrong WVA number, an unverified certificate, or an uncontrolled friction formulation can lead to brake fade, premature wear, or complete braking failure on the road.
This guide walks through the complete sourcing process we use internally — and the same checklist our customers apply when buying from us — so you can buy with confidence whether it is your first container or your fiftieth.
Every disc brake pad, drum lining and brake shoe for commercial vehicles carries a WVA number (the European identification code) and usually one or more OE numbers from the vehicle manufacturer. Getting this right is the single most important step — it determines every dimension, hole pattern and friction requirement of the part.
Three reliable ways to identify your part:
Certification is not paperwork — it is the legal and technical foundation of the product.
SAITE holds ECE R90 and IATF 16949 certification, and is a standing director unit of the China Friction and Sealing Materials Association.
Friction material determines braking performance, noise, dust and service life. For commercial vehicles there are three main families:
| Material | Best for | Trade-off |
|---|---|---|
| NAO (non-asbestos organic) | City buses, lighter trucks, low-noise applications | Shorter wear life at high temperatures |
| Semi-metallic | Heavy trucks, trailers, long-haul — high heat and load | More brake dust, higher disc wear |
| Ceramic | Fleet owners wanting low dust + low noise with good stability | Higher cost than NAO |
See our detailed comparison: semi-metallic vs ceramic brake pads and friction formulations explained.
A full friction supplier covers all four brake part families, so you can consolidate orders and freight. At SAITE:
The critical question: does the supplier control the friction formulation itself, or just assemble bought-in blocks? A factory that mixes its own compounds and runs its own hot pressing line controls the single most important quality variable. Read how brake shoes are manufactured and how to evaluate a Chinese brake manufacturer for the full checklist.
SAITE runs a 50,000 m² facility with our own mixing, pressing, curing and finishing lines — and produces over 10 million brake units per year for more than 50 export markets.
Want the direct comparison? See SAITE vs OEM brake parts: certification, cost and quality compared.
See what happens inside our quality lab: 5 tests every brake part must pass.
Ready to source with confidence?
Send us your WVA or OE numbers — we will confirm cross-reference, certification and lead time within 24 hours.