If you have a BMW 3 series, then you know that it is a great car to own. One of the best features of this car is its tires. The tires on a BMW 3 series are very important and must be kept in good condition.

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One way to keep your tires in good condition is to check the tire pressure regularly and reset it when necessary. If the pressure in your tires gets too low, it can cause them to wear down more quickly and even damage the car.
Luckily, it’s easy to reset the tire pressure on a BMW 3 series. Here’s how:

1. Find the valve stem on one of your tires. This is where you will find the air pressure gauge.
2. Take the air pressure gauge and press it onto the valve stem. Push firmly so that you can get a good reading of your tire’s pressure.
3. You will see two numbers on the gauge, one large number and one small number. The larger number is for PSI (pounds per square inch) and the smaller number is BAR (a metric equivalent to 100 kPa). These are not very important right now, just remember them for later reference.
4. Write down the pressure in PSI under where you will find the date and mileage since you last checked it, then write down what kind of gas was added if you filled up recently (e.g., or Unleaded). If you used air, then write “air” instead of gas.
5. Take the air pressure gauge off the valve stem and press it onto the tire’s sidewall. The best place to find your tire’s pressure is on its sidewall where you will find a series of numbers like this: 35 psi (240 kPa). If there are markings on your sidewall it may say something like 155/70R13 75H. Check your owner’s manual for what type of number system yours uses if you want more information about these markings.
6. Write down the pressure in psi under where you found the last reading using the same shorthand notation that you used before (e.g., or Unleaded). You can simply make one line and continue on the other line if you wish.
7. This is not necessary, but it’s a good idea to check your tire pressure once or twice a month when you fill-up with gas at the pump. Be sure to reset the PSI in your tire when you add air or gas if you do this because it will change over time.