1. Introduction
Trying to replace a car part but not sure what to order? We’ve all been there. Whether it’s a bumper, engine mount, or a gearbox component, finding the exact fit matters. The best way to avoid mistakes is by using the correct car OEM number.
An OEM number (Original Equipment Manufacturer number) is your best friend when searching for genuine parts. It acts like an ID for the specific part designed for your vehicle. In this blog, we’ll walk you through what OEM means, how to find your car’s OEM part number, and how it differs from aftermarket parts. Let’s break it down.
2. What Does OEM Mean in Cars?
OEM stands for Original Equipment Manufacturer. In simple terms, OEM parts are made by the company that produced the original parts for your car’s manufacturer. These are not third-party or knock-off items. They are made to match the exact fitment, quality, and specifications of the original.
When people refer to OEM engine mounts, OEM car accessories, or an OEM gearbox, they mean parts built to factory standards. Some OEM parts come with the carmaker’s branding, while others are made by external suppliers that the car brand trusts. Either way, OEM parts ensure consistent performance and safety.
3. What Are Aftermarket Car Parts?
Aftermarket parts are made by companies other than the original manufacturer. They might look the same, and often cost less, but the quality and fit can vary. Some are great. Others? Not so much.
Unlike OEM car parts that match the original equipment number, aftermarket parts may not be tailored to your specific car model or trim level. This can cause issues with fitment, durability, or performance. If you’re not careful, you might spend more fixing a poor-quality part than you saved buying it.
That said, there are reputable aftermarket brands out there. The key is doing research and verifying part specifications. Still, when in doubt, always go with the OEM number.
4. How to Know the OEM Part Number on Your Car
So how do you find the car OEM number? You don’t need to be a mechanic. Here are three easy ways to locate the right OEM part number:
4.1 Using the VIN Number
The Vehicle Identification Number (VIN) is the ultimate tool to identify parts. It’s a unique 17-character code tied to your car’s make, model, engine, and build details. Think of it as your car’s fingerprint.
Where to find your VIN:
- Bottom of the windshield (driver’s side)
- Inside the driver’s door frame
- On your registration or insurance documents
Once you have the VIN, you can use an OEM part number finder or provide it to a dealer or trusted parts supplier. They’ll use a VIN number lookup to find the exact OEM number for your car. This method ensures 100% compatibility—especially for complex parts like electronic modules, oem engine mounts, or oem gearbox components.
You can also use the NHTSA recalls page to check your VIN for any recalls or manufacturer updates. It’s a government tool that helps you verify original specs and confirm you’re using the correct OEM part.
4.2 Checking the Owner’s Manual
Surprisingly, your owner’s manual can help. Many manuals include part numbers for filters, spark plugs, bulbs, and other automotive accessories. Look for a section titled “Specifications” or “Parts & Maintenance.”
No paper copy? Check the manufacturer’s website. Many offer digital manuals where you can search by VIN or car model. You might not find every part, but for routine replacements, it’s super helpful.
4.3 Using Online OEM Catalogs
OEM parts by VIN number tools are available online. Trusted sites like official dealer portals or licensed resellers allow you to:
- Enter your VIN
- View detailed diagrams
- Browse part specs and OEM quality alternatives
Look for catalogs that mention compatibility with your chassis number, car trim, or production year. These tools often include OE/OEM number matching features that cross-reference Ford OEM part numbers or other brand-specific identifiers.
Bonus Tip: Save the OEM number once you find it. It’s useful for comparing prices and verifying parts across retailers.
5. Difference Between OEM & Aftermarket Parts
Here’s a simple side-by-side comparison:
| Feature | OEM Parts | Aftermarket Parts |
| Manufacturer | Original Car Maker | Third-party Companies |
| Fitment | Perfect Match | May Require Modification |
| Quality | Consistent OEM Standard | Varies by Brand |
| Warranty | Usually Included | Sometimes Included |
| Cost | Higher | Lower |
| Availability | Dealerships or Online OEM Catalogs | Auto Shops, Marketplaces |
Why OEM matters: When using the correct OEM number car part, you’re getting something built to last—not just something that fits “well enough.” If safety, performance, and resale value matter to you, OEM is the safer route.
6. Conclusion
Getting the right car OEM number isn’t complicated when you know where to look. Whether you use your VIN, your owner’s manual, or a trusted OEM catalog, the key is matching the part to the car’s original specs. Avoid the guesswork. Use tools like an OEM part number finder or talk to your dealership.
Remember:
- Use your vehicle identification number for precise matches.
- Always verify part compatibility through OEM number verification.
- Don’t assume all parts that “look similar” will work.
Whether you’re looking for OEM Ford parts by VIN number or just need a new headlight, using the original equipment number saves you time, money, and stress. So next time you need a replacement, don’t guess—get the real thing.
Stay smart, drive safe, and let your car run like it just rolled off the line.
