Are Aftermarket Key Fobs Any Good? 5 Checks Before You Buy
By · Last updated: November 4, 2026
On car forums, the same question keeps coming up: is an aftermarket fob as good as the dealer’s, and which sellers can you trust? Here is a plain answer, including the downsides. UrbanX sells aftermarket replacement fobs, so we have an interest in the topic. Use the checks below on any seller, including us.
What “aftermarket” actually means
- OEM (dealer) fob: made for or by the carmaker and sold through the dealer.
- Aftermarket fob: made by another manufacturer to work with the same vehicle. It is not a counterfeit by definition, but there is no standard that guarantees its quality.
- Used OEM fob: a genuine fob taken from another car. Some are already tied to their original vehicle and cannot be reused. See can a used key fob be reprogrammed.
Are aftermarket key fobs any good?
Many work well for years. The common complaints are real, though: button feel and shell wear that can be a step below the original, battery life or range that is not identical, and the occasional unit that will not program because it was the wrong version. A photo cannot show you any of that, so your protection is a correct match plus a clear return policy.
Five checks before you buy
- FCC ID. It is printed on the back of your current fob. Learn how to read it in our FCC ID lookup guide.
- Part number. The same FCC ID can cover more than one version. See FCC ID vs part number for why both matter.
- Buttons and features. Count the buttons and check for remote start, hatch or panic. A 4-button fob will not give a 5-button car its missing function.
- Key type. Smart (push-button) keys and flip or remote-head keys are not interchangeable, and a flip key needs a cut blade.
- The listing and the return policy. The listing should name your vehicle years and model, not just “fits many cars”. Read the return terms before paying, not after a failed programming attempt.
Not sure which fob you have? Start with your VIN or the FCC ID on your current fob.
Does an aftermarket fob program the same way?
Programming is done to the car, so the method depends on your vehicle rather than on who made the fob. Some cars let you add a key yourself with a sequence of steps. Others need a diagnostic tool. See how to program a car key fob for what applies. Ask your programmer before you buy: some shops will not program a fob you bring, or charge a fee for it. Our locksmith vs dealer comparison covers who can do the work.
When a dealer fob is the better choice
- You want the manufacturer’s own part and are fine paying more for it. For why the price gap exists, read why car keys are so expensive.
- Your dealer or programmer will only work with a fob they supplied.
- You need a feature that no aftermarket listing for your exact vehicle confirms.
Common questions
Is aftermarket the same as a knockoff?
No. Aftermarket describes who made it. A fob is a problem if the seller is vague about what it fits, hides the return terms, or will not show the FCC ID and part number.
Will it work if the FCC ID matches but the part number is different?
Not always. A shared FCC ID can still come with a different button layout or key type. Match both, and confirm your exact vehicle year and model.
What if it will not program?
Check that you ordered the right version, then ask the seller. This is why the return policy is on the checklist. A programmer can also tell you whether the fob or the procedure is the issue.