WVA Numbers Explained: How to Identify Truck Brake Pads and Linings
The WVA number describes the shape of a brake pad or lining. Here is how it works and why it is the fastest way to order the right one.
Brake pads and linings are among the most frequently replaced parts on a commercial vehicle, and among the easiest to mix up. Two pads can look almost identical and still differ by a few millimetres. The WVA number solves this.
What a WVA number is
WVA is a numbering system maintained by the German friction material industry association (VRI). Each number describes the geometry of a friction part: its outline, dimensions and, for linings, the drilling pattern. It says nothing about the brand or the material.
Because it is brand-neutral, the same WVA number is used by friction manufacturers around the world. If you know the WVA number, you can compare offers from different producers knowing that the shape is the same.
How to read it
WVA numbers for commercial vehicles are five digits. Two ranges cover most of what a truck or trailer workshop sees:
| Range | Used for | Example |
|---|---|---|
| 19xxx | Drum brake linings for commercial vehicles | 19488 |
| 29xxx | Disc brake pads for commercial vehicles | 29088 |
A pad set may also carry a suffix or a second number that identifies the thickness or the accessory kit supplied with it.
Why buyers should ask for it
- Faster quotes. A supplier can match a WVA number instantly, without a vehicle lookup.
- Fewer returns. Axle and caliper variants on the same truck model often take different pads. The WVA number removes the guesswork.
- Easier comparison. Offers from several manufacturers can be lined up against one number.
What it does not tell you
A matching WVA number means the pad fits. It does not tell you how it performs. For that, check:
- ECE R90 approval, which is required for replacement brake linings sold in markets that apply UN regulations.
- The friction material grade and whether it suits your duty cycle, for example long-haul, city bus or construction.
- What is in the box: wear indicators, springs and fitting hardware vary between suppliers.
Ordering checklist
- Read the WVA number from the old pad or lining.
- Note the OE number of the vehicle or axle maker if you have it.
- State the axle or caliper make, for example BPW, SAF, Knorr-Bremse or WABCO.
- Say how many axle sets you need.
In the brake system section of Bulapp, linings and pads are listed with both WVA and OE references where available.
Quick answers
Is a WVA number the same as an OE number?
No. The OE number belongs to the vehicle maker. The WVA number is an industry-wide number that identifies the geometry of the friction part, so the same WVA number appears across many brands.
Where do I find the WVA number?
It is normally stamped or printed on the backing plate of a disc brake pad or on the edge or back of a drum brake lining, often next to the manufacturer's own code.
Does the same WVA number guarantee the same quality?
No. It only confirms the shape and dimensions. Friction material, approvals such as ECE R90 and wear behaviour depend on the manufacturer.
Looking for a part?
Search by OE number or send your list for a quotation.
