How to Replace a Gas Cap

  • 1-2 hours
  • Beginner
  • 10-25
What You'll Need
New gas cap
Needle-nose pliers

You may be surprised to know that a leaking gas cap can contribute significantly to your car's fuel costs. One way to prevent unneeded costs is to simply replace the leaking cap. Here's what you should do.

Step 1 - Determine Your Type of Gas Cap

Before acquiring a new one, think about whether you need a gas cap that locks to prevent a gas thief from stealing your gas. But keep in mind, if you put one of these caps on your car, your spouse or children who put gas in your car will need the gas cap key.

Step 2 - Remove the Cap Retention Ring

When you actually replace your gas cap, you may need to remove a retention ring that keeps the cap attached to your car. If you do, you can remove it simply by using a pair of needle-nose pliers. Just slip one tip of those pliers under the ring edge; then close the pliers and pull the ring off the old cap and slip it over the new cap.

Step 3 - Check the Warning Sensor Light

Your car may have a sensor light that will illuminate when you change your cap. If so, drive your car a few miles to see if the light goes off. If it doesn't, see your repair mechanic to fix the problem.