Cap Filler.
Fuel Tank Cap.

• Seals off your fuel tank and prevents contaminants in your gas supply
• Plays an important role in the EVAP system
• Easy to replace on your own

Your INFINITI Fuel Tank Cap is one component that is often neglected. You twist off the Fuel Tank Cap, fill up your tank, and then secure it back on every time you get fuel, but you likely don't give this part another thought.

Your Fuel Tank Cap serves an important purpose in the efficiency of your INFINITI's fuel system. You already know that it provides a seal for your fuel tank and keeps outside debris, moisture, and dirt particles from getting into your fuel. But did you know? The Fuel Tank Cap is also a component of the EVAP, or evaporative emissions system, within your INFINITI.

When you're driving, the fuel in your vehicle heats up and generates dangerous byproducts. However, with the Fuel Tank Cap in place, your EVAP system helps capture these exhaust gases to stop them from seeping out and contaminating the air around your vehicle.

If your INFINITI Fuel Tank Cap no longer clicks onto your fuel tank, or if it becomes loose after being tightened, you probably have a worn out gas tank cap. Since this component is also part of your engine's overall EVAP system, your check engine light may illuminate if your gas cap is malfunctioning. Other indicators of a worn out Fuel Tank Cap include strong gasoline odors while you drive and diminished fuel mileage without having changed any of your travel habits.

There are a couple of consequences of a Fuel Tank Cap that's no longer functioning correctly. A Fuel Tank Cap that doesn't fully seal may push dangerous fumes into the atmosphere, but it may also cause other significant problems in your INFINITI. A broken Fuel Tank Cap can decrease engine performance, lessen your fuel efficiency, and cause fuel leaks. It's wise to replace your Fuel Tank Cap ASAP once you realize that it is no longer functioning correctly.

Replacing your Fuel Tank Cap is fast and easy, and you can do it yourself. You just need to shop with INFINITI directly to get the best possible fit.

This Fuel Tank Cap (reference number 172519BA0B) will fit your INFINITI G35. See the What This Fits tab for more details.