The average cost for a gas cap replacement is $26, including $14 for parts and $12 for labor. The exact price will depend on your vehicle’s year and model.

The cost of parts includes a new fuel cap, but the situation might call for a new fuel filter, fuel pressure sensor, and fuel pump, too. As for labor costs, it takes around 0.1 hours hours for a certified mechanic to inspect your vehicle, diagnose the problem, and screw on a new cap.

Here’s how much you’ll pay for a gas cap replacement for some popular vehicle models:

Estimate Date	Customer	Car	Fair Cost Estimate	Parts Cost	Labor Cost	Labor Time
April 24, 2024	Irene, 23 Raleigh, NC	Saab 45172	$22	$9	$13	0.1 Hours
April 19, 2024	Margaret, 30 Anthony, FL	Plymouth Neon	$19	$9	$11	0.1 Hours
April 16, 2024	Lois, 36 Westbrook, CT	GMC Sierra 1500	$24	$9	$15	0.1 Hours
April 16, 2024	Ola, 35 Auburn, WA	Pontiac Grand Prix	$22	$9	$13	0.1 Hours
April 12, 2024	Kyle, 43 Concord, CA	Isuzu Trooper	$25	$9	$16	0.1 Hours

How did we estimate these prices?
Jerry's experts researched and collected data from 2500+ real repair shops in all 50 states in the US, including everything from the total cost of repair services to the hourly labor cost for mechanic labor in each shop. We combined that data with our expert database of hundreds of real repair jobs, thousands of real cars, millions of real car part prices in order to best estimate the cost of each repair service. Our labor cost estimate is calculated by taking the average hourly labor rate for a certified mechanic in the US, times the number of hours it takes on average to complete a repair. We recommend you compare your local shops with Jerry and contact those shops directly to get final pricing for your vehicle.

Get a free fair cost estimate for my car

See fair price estimates for popular cars

What parts do you need for a gas cap replacement?

The gas cap is just the tip of the iceberg in your car’s fuel assembly. Getting the system to work might involve installing a replacement:

Gas cap ($5-$160): Gas caps do more than prevent gas from sloshing out of a full tank. Gas caps create an airtight seal that prevents emissions from escaping, water from getting into the fuel tank, and anything from interfering with fuel pressure. Cracks are obvious, seal problems are less so.

Fuel pressure sensor

($30-$660): Proper fuel pressure is essential for a clean, efficient engine. Any car problems with fuel pressure could be caused by the gas cap or the fuel pressure sensor itself. A skilled mechanic can tell the difference.

Check engine light

(varies by type): Although dashboards may change from gauges to electronic screens, the check engine light remains the same. Whether orange, yellow, or amber, it signals a range of problems, including a loose gas cap. Rarely, the check engine light itself is faulty.

Fuel tank ($75-$2,200): The integrity of the gas tank is critical. It keeps gas and keeps it pressurized. A leak will spill precious gas directly onto the road and is often caused by corrosion or clogs in the filter or damage to the underside of the vehicle.

Keep in mind: Restoring the integrity of your fuel system may involve replacing the gas cap, fuel pressure sensor, or check engine light.

You can buy all of these parts for your replacement from auto parts stores like AutoZone, NAPA Auto Parts, and Advance Auto Parts, as well as online retailers such as Amazon and RockAuto.

Three brands we recommend for gas cap replacements are Stant, ACDelco, and Motorcraft. For a new fuel pressure sensor we recommend brands like ACDelco, Bosch, and Standard Motor Products. For dashboard components like your check engine light, we recommend ACDelco, Dorman, and Standard Motor Products. Lastly, when it comes to purchasing a new fuel tank, Spectra Premium, Dorman, and Replace offer reliable fuel tanks that are designed to fit and function properly in your vehicle. Keep in mind that the best options for your suspension lubrication parts will vary depending on your car’s year, make, and model.

Should I buy an OEM or aftermarket fuel cap?

Original equipment manufacturer (OEM) parts cost more than aftermarket parts but often include better warranties.

For example, if a certified Toyota mechanic performs the installation, a new Toyota fuel cap comes with a 24-month/25,000-mile warranty. The cost is even higher for luxury makes like Audi or Mercedes-Benz.

That said, some aftermarket performance auto parts offer similar quality to OEM parts.

Where can I buy parts for my gas cap replacement?

You can buy a new gas cap at automotive body and parts shops like AutoZone, Advance Auto Parts, and NAPA Auto Parts, dealerships, or online stores like Amazon and RockAuto.

If you prefer OEM parts, you can also try your vehicle manufacturer’s official website. Ford, Dodge, Nissan, and just about every other car maker sells OEM parts online. Check your owner’s manual for any crucial specifications so you don’t buy the wrong part.

Find out what parts are recommended for my car

Where can I get my gas cap replaced?

Dollar signs and stars are eye-catching, but if you’ve ever wished to compare local auto shops in more detail, you need to try Jerry's

GarageGuard™

. Jerry's GarageGuard™ helps you compare fair pricing estimates* for replacement gas caps, just like Jerry helps you compare

car insurance quotes

Join the app and you’ll connect with a network of over 2,500 vetted auto repair shops across the country. You’ll get real hourly labor rates, diagnostics fees, and user reviews to compare so you can make an informed (and money-saving) decision.

Download the app today to browse quotes from vetted shops like the ones below!

169 Reviews

Pep Boys Auto Parts & Service - South Walker #754

7600 S WALKER ST, Oklahoma City, OK

Gas Cap Replacement Cost

Fair Cost Estimate for This Shop

$152

(Parts - $15, Labor - $137)

Shop Diagnostic Fee

(Included in service charges)

$100

Compare this shop for free with Jerry (405) 631-0070

129 Reviews

Valvoline

6445 Canal St, Canal Winchester, OH

Gas Cap Replacement Cost

Fair Cost Estimate for This Shop

$63

(Parts - $15, Labor - $48)

Shop Diagnostic Fee

(Included in service charges)

Compare this shop for free with Jerry

124 Reviews

Mobile 1 Lube Express

826, 824 E Chicago St, Elgin, IL

Gas Cap Replacement Cost

Fair Cost Estimate for This Shop

$65

(Parts - $15, Labor - $50)

Shop Diagnostic Fee

(Included in service charges)

Compare this shop for free with Jerry

190 Reviews

Goodyear Auto Service - Stevens Creek

3146 Stevens Creek Blvd, San Jose, CA

Gas Cap Replacement Cost

Fair Cost Estimate for This Shop

$174

(Parts - $15, Labor - $159)

Shop Diagnostic Fee

(Included in service charges)

$170

Compare this shop for free with Jerry (408) 296-7435

How did we vet these shops?
Jerry experts researched 2500+ real repair shops across the US. We talked to real shop customers, and analyzed both real shop pricing data and thousands of real customer reviews from each shop to verify them individually. We do not partner with the shops listed above, and our analysis is always unbiased.

How will a mechanic do a gas cap replacement?

Replacing a gas cap is a very simple service. All the mechanic needs to do is:

Examine the gas cap

Inspect your vehicle’s fuel system for proper pressure, airtightness, and sensor function

Remove the faulty fuel cap

Screw on the new fuel cap

Retest the system to see if there’s been an improvement

Can you drive a car with a bad gas cap?

Yes, you can drive a car with a bad gas cap—but why would you want to? Fuel caps are relatively inexpensive compared to other car parts and they prevent costly consequences such as:

Contaminants: Dust, dirt, and water can enter an unprotected gas tank and spoil your fuel, making your filter and engine work overtime.

Harmful emissions: A non-airtight gas tank can cause fuel evaporation and oily, smelly fuel vapors.

Check engine light: Because your fuel pressure is compromised, the check engine light may come on. Replace the gas cap or you could miss another problem.

What is a gas cap replacement?

Replacing a gas cap involves very little labor but may require extensive inspection. If your gas cap isn’t obviously broken or missing, your mechanic will have to rule out problems with the fuel pump, fuel lines, fuel tank, and fuel filter as well.

If you’re due for a California smog test, make sure to fasten your gas cap tightly beforehand.

How do I know if my gas cap needs replacing?

You might need to replace your gas cap if you notice the following warning signs:

The fuel cap is missing

The fuel cap is broken

Your vehicle fails a smog or emissions test

Your check engine light is on

Your garage smells like gasoline

The computer system in your car might also be able to detect the consequences of a loose gas cap, like decreased fuel pressure. However, you won’t know why the check engine light is illuminated unless you have an OBD code reader.

How long do gas caps usually last?

Gas caps can usually maintain an airtight seal for at least 50,000 miles. They aren't high-impact, high-wear car parts, so your vehicle's manufacturer might not even list an estimated lifespan. Considering how cheap they are, replacing an old vehicle's filler cap could be a good idea.

Can I do a gas cap replacement myself?

With zero equipment required (just the knowledge of how to screw a lid on a jar), you can perform a gas cap replacement yourself. If you’re feeling fancy, you can add a tether or upgrade to a locking fuel cap for as little as $1 extra.

So why would anyone visit a mechanic to replace a gas cap? In most cases, the problem is not with the installation, but with the diagnosis. You may not notice subtle signs of malfunction like emission control problems or reduced fuel economy, if your gas cap isn't obviously damaged or missing.

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FAQs

What causes a gas cap to go bad?

Wear, improper threading, or overtightening can cause a bad gas cap. If dirt or dust gets into the threads of the fuel filler neck, you may wear away the seal each time you screw on the cap.

Does it matter what gas cap you use?

Yes, it does matter what gas cap you use because different cars use different fitments. A gas cap of the wrong size won’t keep your fuel system airtight, and may not even stay on. Check the specifications in your vehicle’s owner’s or repair manual before buying a generic part.

Will the check engine light turn off after replacing the gas cap?

Yes, the check engine light should turn off after replacing the gas cap. That said, you might need to give your car’s computer a couple of minutes to detect the difference.

Meet Our Experts

John Davis

Car Expert

Certified mechanic with 10+ years of experience

John Davis is an expert automotive writer and former automotive mechanic. John's work spans multiple categories, and he relishes the opportunity to research a new subject and expand his area of expertise and industry knowledge. To date, John has written more than 200 articles covering car maintenance and care, car advice, how-to guides, and more.

Prior to joining Jerry’s editorial team, John worked as a mechanic and freelance writer, creating content for clients including HotCars and SetPower.

Jessica Barrett

Car Expert

Jessica Barrett is a senior insurance writer and editor with 10 years of experience in the automotive and travel industries. A specialist in car insurance, car loans, and car ownership, Jessica’s mission is to create comprehensive content that car owners can use to manage their costs and improve their lives. As a managing editor for a team of writers and insurance specialists, Jessica has edited over 2,000 articles for Jerry on topics ranging from local insurance shopping tips to refinancing car loans with bad credit.

Before joining Jerry as a senior content editor in 2021, Jessica created visual content for clients such as Expedia, Vivid Seats, Budget Direct Car Insurance, Angie’s List, and HomeAdvisor. Her content was published in Business Insider, Forbes, Apartment Therapy, and the BBC.

Kathleen Flear

Car Expert

Kathleen Flear is an expert insurance writer and editor who heads up Jerry’s editorial team as director of content. Kathleen empowers drivers to make smart car ownership decisions through best-in-class articles on insurance, loans, and maintenance. Prior to joining Jerry in 2021, Kathleen served as managing editor for a team of SEO content marketing professionals at Article-Writing.co and worked as a freelance writer and editor for a range of digital publications, including Chicago Literati magazine and Golden Words. She earned a bachelor’s degree in English language and literature from Queen’s University, and a master’s degree in creative writing and fiction from Sierra Nevada University.

*The price information provided on our car repair webpages is intended for general informational purposes only. Actual prices for car repair services may vary based on various factors, including but not limited to the make and model of your vehicle, the extent of repair required, and the prevailing market conditions. All prices for real repair shops are estimations based on our research only. Therefore, the prices listed on our webpages should not be considered as final quotes or binding offers.