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How to make sense of the dials and sensors
Cars come with a lot of gauges, especially on older models. Even newer model cars offer so many diagnostic numbers that they can confuse the most experienced drivers. To help you make sense of your dashboard gauges, here is a rundown of the six most important car gauges you'll encounter.

What is the speedometer?
The most basic car gauge is the speedometer, the indicator that tells you how fast you're going. But this gauge isn't just impacted by your speed; your tires also play a role. Larger tires rotate at a slower rate, which means that if your tires are overinflated or you've added bigger tires to your vehicle, your speedometer will register a slower speed. That means that you should be aware you may be speeding even if your speedometer is at the speed limit.

Alternatively, smaller or underinflated tires rotate at a faster speed, meaning your speedometer may be saying you're going faster than you actually are. That said, always pay attention to your tire pressure.