A gas cap replacement costs $138 to $150 in 2026
A gas cap replacement costs $138 to $150 at most US shops in 2026, per RepairPal's national estimate. Labor is about $24 to $36 and parts are about $114. Jerry says customers can expect to pay $75 to $160 when the gas cap is the clear cause, with parts at $15 to $60. AutoNation says a fuel cap replacement can cost anywhere from $10 to $100.
What price guides say
We checked 5 price guides. They do not all measure the same thing, so read each line for what it counts.
| Source | What it found |
|---|---|
| RepairPal | National average $138 to $150. Labor is about $24 to $36 and parts are about $114. |
| Jerry | Jerry says customers can expect to pay $75 to $160 when the gas cap is the clear cause, with parts at $15 to $60. |
| AutoNation Mobile Service | AutoNation says a fuel cap replacement can cost anywhere from $10 to $100. |
| AutoZone | AutoZone says a fuel cap costs an average of around $25, but diagnosis can add more cost. |
| YourMechanic | YourMechanic says the average is $100, with $5 for parts and $95 for labor. |
What pushes the quote up
| What | Why it matters |
|---|---|
| Cap price | A plain cap is cheap. A factory cap for some cars costs a lot more. |
| Diagnosis fee | Most of the bill is often the time to find out the cap is the problem. A scan and leak test cost more than the cap. |
| Locking or tether style | Some caps have locks or a cord. They cost more than a simple twist cap. |
| Other leaks | A bad filler neck seal or EVAP hose can set the same light. Fixing those raises the bill. |
| Shop minimum | Many shops charge a minimum labor time even for a quick swap. |
How to tell you need it
- The check engine light is on, and the code is for a small EVAP leak.
- The cap does not click, is cracked, or the seal is worn or loose.
- You smell fuel near the cap, or a message says the fuel cap is loose.
What the price includes
The price usually covers the new cap and the time to fit it. Some shops add a scan to clear the code and check the light stays off. It does not include tax, shop supply fees, or other repairs the shop finds while the car is in.
How to judge your quote
- Ask if the shop will first tighten the cap or test it before selling a new one.
- Ask what the diagnosis fee is and if it is taken off the repair price.
- Ask if the new cap is the right type for your car, factory or a good match.
- Ask if they will clear the code and confirm the light stays off.
- Compare the total with the range above: $138 to $150 for most cars.
Ways to pay less
- Buy the cap yourself at a parts store. It is a ten second job, and you save the labor.
- Tighten the cap until it clicks, and drive a few days. The light may go out by itself.
- Match the cap to your car's year and engine so it seals right.
- Do not pay for a big EVAP test before trying a new cap first.
Dealer or independent shop
RepairPal puts labor for a gas cap replacement at $24 to $36. At the typical independent shop rate of about $140 an hour, that is under 1 hour of work. A dealer charging $200 an hour would bill about $43 for the same labor, and a $100 an hour shop about $21. Parts cost about the same anywhere, so the shop rate is where you can save. See what mechanics charge an hour.
Why this costs more in 2026
Shop labor now runs about $100 to $250 an hour. Many car parts are imported, and freight costs went up after the oil shock that began with the Iran war in February 2026. Steel, copper, aluminum and resin prices are up too, and they go into almost every part. Gas caps now hold a precise rubber seal and sometimes a pressure valve, so a good fit cap costs more than the old plain metal ones.
How we got these numbers
The national range, the labor and parts split and the prices by car come from RepairPal's gas cap replacement estimate, last updated September 3, 2026. We checked them against Jerry, AutoNation Mobile Service, AutoZone and YourMechanic, and read every number on the source page on October 7, 2026. These are planning ranges, not quotes. Your shop's written estimate is the real price.
Common questions
How much does a gas cap replacement cost?
RepairPal puts it at $138 to $150 in 2026 for common cars. Labor is about $24 to $36 and parts are about $114.
Why do gas cap replacement quotes vary so much?
The biggest reasons are cap price, diagnosis fee, locking or tether style. Your car and the shop's hourly rate matter most.
What does the price include?
The price usually covers the new cap and the time to fit it. Some shops add a scan to clear the code and check the light stays off.
Is an independent shop cheaper than a dealer?
Usually. Independent shops often charge about $100 to $150 an hour and dealers $130 to $250, and labor is a big part of this job.