Parts · 2 min read
Buying car parts online: A quick fitment checklist
Check vehicle variant, part numbers, the source of the fitment claim, and what comes in the box.
CapCar Editorial ·
The part in the photo looks like the old one. The listing says “fits BMW 3 Series.” Both are starting points, but neither confirms it fits your car. Gather the vehicle details and any available part references before comparing listings.
| Check | What to record |
|---|---|
| Vehicle | Year, body style, engine, and relevant equipment |
| Starting point | The existing part number or other documentation, if available |
| Listing | Manufacturer, part number, and any restrictions |
| Confirmation | The reliable source that confirms fitment |
| What’s included | Anything you’ll need to get separately |
| Decision | Confirmed, question outstanding, or ruled out |
Example: Two listings name the same model but show different part numbers. Instead of picking the cheaper one, ask whether it fits your exact variant and save the reply alongside the listing. For safety-critical parts or unclear compatibility, ask a qualified professional to check.
Record where you got the number. A number from an advert isn’t the same as one read from the original part. If a question is still open, leave the item on your wish list until you have an answer.
Use the CapCar Project Car Planner to keep the listing and your unanswered question together.
Your next article
Build planner · 4 min read
A build plan that starts with one real job
Turn a saved idea into one defined job, a realistic budget and a useful next action in CapCar.
Read the article and use the checklist →
Vehicle guides · 3 min read
Before the first screw: use the guide, keep the result
Find a guide for your vehicle, check its prerequisites and keep a useful record of what actually happened.
Read the article and use the checklist →