PublishedNovember 1, 2026
Two cars that look identical on the forecourt can take different brake pads, different filters and different sensors. The part number is what separates them. This guide explains where the number lives on your vehicle, how to check it before you order, and what to send us when the number on the old part has worn away.
What is a car part number?
A part number is the manufacturer’s own identifier for one component: a specific pad set, filter, sensor or bracket, for a specific model, engine and production period. A description like “front brake pads” covers dozens of variations, while a part number covers one. That is why the number is the shortest route to a correct quote.
Where do I find the VIN or chassis number?
The VIN is usually visible through the bottom corner of the windscreen, stamped into the firewall or a strut tower under the bonnet, and printed on the registration document. It is normally 17 characters of letters and digits, and it encodes the model, engine, model year and assembly plant. In Sri Lanka and the Gulf the same identifier is often called the chassis number; both terms mean the same thing.
Where do I find the part number on the car?
Most components carry a number cast, stamped or printed on the housing, and the original box or an old invoice is often the easiest place to read it. Look on the machined face of a brake caliper, the plastic body of a sensor, the edge of a filter, or the label on a control module. Photograph the label before the part is removed if you can, because heat and road dirt make old numbers hard to read.
How do I read a part number?
Most manufacturer numbers are a block of digits and letters with no meaning you can decode at home: a model prefix, a component group and a revision suffix. Two numbers can look almost the same and fit completely different cars, so do not complete a number from memory. Copy it exactly, including any letters at the end, and keep the photo of the original label.
How do I check a part number against my vehicle?
Match the number to the model year, the engine code and any equipment that changes the part, such as air suspension, a tow pack or a larger brake package. A manufacturer parts catalogue is the reference point; a search result is not. If the number you find belongs to a different market or an earlier version of the part, the fit can still be right, but it needs confirming.
What is a crossover number?
The number printed by the original supplier is not always the same as the number in the marque’s own catalogue, even when the part is identical. A crossover list maps one to the other so a workshop can compare alternatives. Treat a crossover as a lead rather than proof: it can be right for the part and wrong for the vehicle when trim or equipment differs.
Why does the same part have several numbers?
Manufacturers supersede numbers when a supplier changes, a material is revised, or a component is bundled into a kit. Different markets can also carry local numbers for the same part. When we quote, we name the number we are supplying so you can compare it with what came off the vehicle.
Does the model year alone tell me which part I need?
No. The model year narrows the range, but the engine code, transmission and equipment level decide the rest. A model built in two plants, or sold in two markets in the same year, can carry different brakes, filters and sensors. The VIN resolves that, which is why we ask for it before quoting.
What if the number on the old part is unreadable?
Send the VIN, the model year and the engine code, plus a photo of the part in place before removal. Casting marks, connector shapes, mounting points and hose routing often identify a part when the label is gone. A measurement across a mounting face or a shaft diameter can settle the last doubt.
Can I send a photo of the old part instead of a number?
Yes, and for body panels, trim and older vehicles it is often the better route. Take one photo of the whole part, one of any label or stamped number, and one showing where it mounts. Good light and a clean surface matter more than a high-resolution camera.
What should I send with a parts request?
- Make, model and year.
- Engine code and the VIN or chassis number.
- The part name and the number you have, even if it is damaged.
- Position: front or rear, left or right.
- Quantity, especially when the parts are for a workshop job.
- Photos of the part and its label, if you have them.
- Any deadline the job is running to.
A list of several parts is fine. Send it on WhatsApp, by email, or through the quote form, and we will work through it line by line.
How do we use the number before quoting?
We check the number against the vehicle details you send, and we tell you when something does not line up: a superseded number, a different engine code, or a part that only fits one brake package. Where two quality tiers are available, the quote names each one so the choice is yours. We would rather ask one more question than ship the wrong part.
What is confirmed before the part ships?
The details on the quote: the part number, quantity, quality tier and the vehicle it is being bought for. Fitment rests on the details you provide, so check the number and the model year on the quote before you confirm. If anything looks wrong, say so before the order is placed; the Terms of Use set out the same point.
Where do I start?
Start with the number if you have it, or with the vehicle and a photo if you do not. You can see the marques we source for on the BMW parts page, browse braking parts by category, or send the request straight through for a quote with freight included.