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what radio are you using? what receiver are you using? how old is the receiver? are you using it in a nitro or electric car? 1s or 2s? BEC or straight from the ESC?

we need more info

50 yards? How can you even see your car?

maybe no more than 100 ft

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I would check to see if there are any damage to the antenna itself and open up the receiver and make sure the antenna did no pop out of its connector on the circuit board. If everything looks fine and still loses signal then I guess you know the answer to your question.

50 yards isn't that far...

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Well, short answer is yes, a receiver CAN go bad from time to time, but before assuming it's that, you might also try another receiver that you know is working in that car & see if that changes anything in your car in question. If it still behaves the same with another receiver, then it's likely something else, maybe a problem with the receiver not getting enough power from the rest of the car's electronics. It also might help for us to know what car you're talking about,as well as what kind of motor, ESC, batteries you're using in it, maybe even what servo(some of the more power-hungry servos can put more stress on the system's BEC voltage, maybe cause it to drop enough that could cause glitching or brown outs....

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Check the aerial on the transmitter as well.
If you can, open the transmitter up and check that the aerial wire is still in good condition and properly connected/soldered.

Anything can go bad over time.

Thanks to everyones....found the problem...Thanks again