Genuine BMW Parts
Parts and accessories sold under the BMW name through authorized BMW centers, matched to BMW part numbers for specific models. BMW also calls these Original BMW Parts.
BMW of Cape Cod | Parts Buying Guide
Genuine BMW Parts vs. Aftermarket Parts: What Owners Should Compare
Whether you are replacing wiper blades before winter or planning a larger repair, you will usually have a choice between Genuine BMW parts and aftermarket alternatives. Here is a neutral framework for comparing them on fitment, documentation, warranty, installation, and the full scope of the job.
Last reviewed: October 2026 | Prepared by: BMW of Cape Cod Parts Department, 500 Yarmouth Rd, Hyannis, MA
What should I compare when choosing between genuine BMW and aftermarket parts?
Compare five things: fitment (can the part be confirmed for your exact vehicle by VIN), documentation (is there a clear part number and specification), parts warranty (who backs the part, for how long, and whether labor is included), installation requirements (does the part need special tools, programming, or registration after installation), and total project needs (what else the job requires, such as hardware, seals, or fluids). Genuine BMW parts are designed for BMW vehicles and come with BMW's parts warranty. Aftermarket parts vary widely by manufacturer, and some are well suited to certain jobs.
Parts Terminology Explained
"OEM" Parts
OEM stands for original equipment manufacturer. Sellers use the term in different ways, so a part labeled OEM is not necessarily a Genuine BMW part. Ask what the label means for the specific part.
Aftermarket Parts
Parts made by companies other than the vehicle manufacturer. They range from direct replacements to performance and styling upgrades, and quality, documentation, and warranty vary by brand.
Comparison Criteria at a Glance
Use the right-hand column to ask the same questions of any part, whichever source you choose.
| Criteria | Genuine BMW Parts | Aftermarket Parts | What to Ask |
|---|---|---|---|
| Fitment verification | Our parts team can look up the correct BMW part number for your vehicle using its VIN | Depends on the manufacturer's catalog and how specifically it covers your model and build | Has this part been matched to my VIN, not just my model and year? |
| Documentation | BMW part number tied to BMW's specifications for your vehicle | Varies by brand; look for a clear part number, specifications, and fitment notes | Is there a part number and installation guidance I can keep with my records? |
| Parts warranty | BMW offers a 2-year/unlimited-mileage limited warranty on Original BMW Parts and Accessories newly purchased from an authorized BMW center, subject to installation guidelines and exclusions | Set by each manufacturer or seller; terms and claim processes vary | Who backs the warranty, for how long, and is labor covered? |
| Installation requirements | Some components, such as batteries and certain electronic modules, may need to be registered or programmed after installation | The same vehicle requirements apply; some parts may need extra steps or adapters | Does this part need programming, registration, or special tools? |
| Total project needs | Our parts team can identify related items the job requires | Kits vary; related hardware may be sold separately | What else does this job need, such as bolts, seals, gaskets, or fluids? |
| Vehicle warranty | Designed for BMW vehicles and installed according to BMW guidelines | Under federal law, using an aftermarket part does not by itself void your vehicle warranty, but damage caused by the part may not be covered | If something goes wrong, who covers the part and any related damage? |
When Each Option Can Make Sense
Consider Genuine Parts When…
- Exact fitment matters, such as sensors, electronics, and body panels.
- You want a part backed by BMW's parts warranty.
- The repair will be done by a BMW service center.
- You want a BMW part number on record for future service.
Aftermarket May Fit When…
- You want a performance, styling, or appearance upgrade BMW does not offer.
- A reputable brand documents fitment and warranty for your exact vehicle.
- The part is a common wear item with many proven options.
- You are comfortable comparing specifications and warranty terms yourself.
Common Mistakes When Buying Parts
Ordering by Model Name Instead of VIN
BMW often uses different parts across production dates, engines, and equipment levels within the same model. Matching a part to your VIN is the most reliable way to avoid returns and repeat labor.
Comparing Part Prices Without the Whole Job
A lower part price can be offset if the job also needs separate hardware, programming, or extra labor. Compare the complete project, not just the part itself.
Local Expertise: Getting the Right Part on Cape Cod
The parts team at our Hyannis BMW dealership can help you compare options and confirm fitment before you buy. To make your request fast and accurate:
- Include your VIN: The parts request form asks for your name, year, make, and model, with an optional VIN field. Adding the VIN lets our team confirm the exact part.
- Name the part or part number: List up to three part names or numbers, and add notes about the job in the comments.
- Prepare for winter: Wiper blades, floor mats, and similar items are popular before the season changes. Our Parts Center lists the accessories we carry.
- Need installation? Our service department can install parts for you. Schedule service or visit BMW of Cape Cod.
Frequently Asked Questions
Are aftermarket parts always lower quality than genuine BMW parts?
No. Quality varies widely by manufacturer. Some aftermarket parts are well made and well documented, while others may not match your vehicle's specifications. Compare fitment, documentation, and warranty for the specific part.
Will aftermarket parts void my BMW warranty?
Not by themselves. Under the federal Magnuson-Moss Warranty Act, as explained by the Federal Trade Commission, a manufacturer cannot void your warranty simply because you used an aftermarket part. However, if an aftermarket part causes damage, repairs for that damage may not be covered.
What warranty comes with Genuine BMW parts?
BMW offers a 2-year/unlimited-mileage limited warranty on Original BMW Parts and Accessories newly purchased from an authorized BMW center. Installation guidelines and exclusions apply, so ask our parts team how coverage works for your part and installation.
Is an OEM part the same as a Genuine BMW part?
Not necessarily. Sellers use "OEM" in different ways. A Genuine BMW part is sold under the BMW name through authorized BMW centers. If a listing says OEM, ask exactly what that means for the part.
How do I request a part from BMW of Cape Cod?
Use our online parts request form with your contact information, your vehicle's year, make, and model, your VIN if you have it, and the part names or numbers you need. Our parts team will follow up.
Continue Your Research
Source: Genuine parts warranty terms reflect BMW of North America's Original BMW Parts and Accessories limited warranty as of the last-reviewed date; terms, installation guidelines, and exclusions apply and may change. Vehicle-warranty information reflects Federal Trade Commission consumer guidance on the Magnuson-Moss Warranty Act and is not legal advice. Aftermarket part warranties are set by each manufacturer or seller. Contact our parts team to confirm fitment and coverage for your vehicle.