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?

Find the best car for your needs today! Check out the highest-rated 2026 models on the market according to our Driving data-driven ratings!

Find the best car for your needs today! Check out the highest-rated 2026 models on the market according to our Driving data-driven ratings!

Audi's "critical" new mid-size SUV shows promise with more kit and solid on-road manners – but price rises and some spec anomalies grate.