How Long Does a Fuel Filler Cap Last?

Having the right amount of gas in a car is vital in cranking and running the vehicle. Each of the components in the fuels system play a vital role in ensuring that the car runs as it should. The filler neck of the gas tank runs to the side of the vehicle and is where you will put in your gas. On the top of this filler neck is the fuel filler cap, which helps to keep water out of the gas tank. This part of the car is used on a constant basis, which is what leads to it becoming damaged over time.

In most cases, the fuel filler cap on a vehicle will have a seal under where the threads are attached. This seal helps to keep the moisture out of the gas tank. As time goes by, the seal will begin to deteriorate due to wear and tear. Usually, the seal will begin to dry out and will break apart. Not having this seal on the gas cap will lead to increased amount of moisture getting into the gas tank and wreaking havoc on the engine. Gas caps are designed to last for about 100,000 miles. In some cases, the gas cap will deteriorate at a rapid rate due to abnormally harsh conditions.

Taking the time to inspect the fuel filler cap on occasion will allow you to figure out if there are any issues that need to be addressed. If you notice that the seal is broken or if the threads on the cap are stripped, then a fuel filler cap replacement will be needed.

The following are some of the things to look for when it is time to replace the fuel filler cap.

  • The Check Engine Light comes on and stays on
  • The car will not pass an emissions test
  • The seal on the cap is broken or missing
  • The cap is completely missing

Noticing the signs that the fuel filler cap is damaged and acting quickly can help to reduce the amount of damage that is done.


Next Step

Schedule Gas Cap Replacement

The most popular service booked by readers of this article is Gas Cap Replacement. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Recent Gas Cap Replacement reviews

Excellent Rating

(56)

Rating Summary
49
2
2
1
2
49
2
2
1
2

Jay

37 years of experience
947 reviews
Jay
37 years of experience
Volkswagen Passat L5-2.5L - Gas Cap - San Jacinto, California
Jay provided Great service, he was very Knowledgeable with issues regarding my car. Explained what he did, and recommendations of future services needed. Will definitely use jay again, and looking forward to booking him to service our other car. Thank you Jay
Mini Cooper - Gas Cap - Redlands, California
For a while it seemed that Jay had hit a "snag" but stuck with the problem and fixed it! I admire his "stick to itness."

Brian

23 years of experience
658 reviews
Brian
23 years of experience
Chrysler PT Cruiser L4-2.4L - Gas Cap - Jacksonville, Florida
Competent and kind. He understood my difficulties hearing and made adjustments so that I would understand what he had done and what would need to be done/checked in six months. I will ask for him again and I will recommend your company based upon Brian's professionalism.
Chrysler 200 - Gas Cap - Jacksonville, Florida
Brian listened to all the concerns I had with my car, he seemed very knowledgeable , and he also got the job done pretty quick.

Jean

15 years of experience
61 reviews
Jean
15 years of experience
Buick Century V6-3.1L - Gas Cap - Tampa, Florida
Good Mechanic. Explains issue's well, and will break it down for estimates if you need to do repairs on a low budget over time!

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Cadillac CTS V6-3.6L - Gas Cap - Las Vegas, Nevada
Raymond is extremely knowledgeable and was on time and very cordial. He is someone that will go on our MUST HAVE CONTACTS!! 5 

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

Related articles

How Long Does a Fuel Pressure Regulator Last?
In In order for the fuel system in a car to operate properly, it will need to have the right amount of pressure. The injectors that are mounted in each cylinder of the engine have to disperse the right level...
How to Clean a Throttle Body
A throttle body needs cleaning when the engine idle is rough, the engine stumbles through acceleration, or the Check Engine Light comes on.
3 Reasons Your Car Smells like Rotten Eggs
A sulfuric or rotten eggs smell indicates an excess of byproducts left over from failed combustion. Removing the smell requires part replacement.

Related questions

Need to know if I can use Bosch 4 hole injectors for my truck.
Hi there. I recommend using Bosch D3 injectors over older metal body injectors (https://www.yourmechanic.com/services/fuel-injector-replacement). The 4-hole spray tips atomize fuel much better than your stock injectors. The injectors have flow balancing to ensure that each cylinder gets the same amount...
Truck has trouble starting, looks like it's not getting enough gas.
If you have to feather the gas pedal to keep the motor running, this suggests that the fuel pressure may not be maintained at the correct level when starting. The fuel pressure regulator (https://www.yourmechanic.com/services/fuel-pressure-regulator-replacement) is a unit that monitors and...
Is the problem my fuel pump, relay, or connector.
It could be all three problems. The fuel pump may be drawing too many amps or connection at the pump is not making real good contact and needs pump and connector replaced. The fuel pump relay and contact connector pins...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com