The key fob is your lifeline to your car, letting you unlock the doors and set off the alarm, at a minimum, but how can you tell if it needs a new battery?

Q: After losing one of the two key fobs for my 2008 Nissan Altima, I purchased a new fob from a hardware store and they programmed it. After seven months, the car stopped recognizing the key, and ...

Problems with keyless fobs appear to be an increasingly common problem for motorists as technology has shifted the market away from the traditional key and lock.

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine.

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine.

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine. This can ...

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine.

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine.

Nissan says the SUVs have jackknife folding keys that may not stay fully open. If driven with the key partially folded, a driver could touch the fob, inadvertently turning off the engine.