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's Fuel Tank Cap is a car part that is often neglected. You remove the Fuel Tank Cap, top off your fuel levels, and then secure it back on each time you fuel up, but you likely don't give this part another thought.

Your Fuel Tank Cap serves a vital role in the overall function of your INFINITI. Obviously, it provides a seal for your fuel tank and keeps outside dirt, water, and other harmful debris from contaminating your gas supply. But, it has another purpose, too. The Fuel Tank Cap is also part of the EVAP, or evaporative emissions system, within your INFINITI.

When you're driving, your fuel heats up significantly and releases toxic vapors. Fortunately, with a securely-fitted Fuel Tank Cap, the EVAP system helps capture and recirculate those emissions to prevent them from seeping out and contaminating the air around your vehicle.

If your INFINITI Fuel Tank Cap no longer clicks into place, or if it frequently loosens even after you've tightened it completely, you probably have a damaged or worn out gas cap. Since this part is a component in your engine's overall EVAP system, your check engine light may illuminate if your gas cap is malfunctioning. Other signs of a worn out Fuel Tank Cap include smelling gasoline while driving and diminished fuel mileage (with no change in your driving habits).

Consider the consequences of a Fuel Tank Cap that's no longer functioning correctly. A Fuel Tank Cap with a busted seal may release damaging byproducts into the environment, and it could also lead to other significant problems in your INFINITI. A worn out Fuel Tank Cap can diminish engine performance, lead to poor gas mileage, and create messy fuel leaks. You should consider replacing the Fuel Tank Cap in your INFINITI immediately once you notice that it is no longer functioning correctly.

Replacing your Fuel Tank Cap couldn't be easier, and you can do it yourself. All you need to do is shop directly with INFINITI Genuine Parts to get a perfect fit for your model and trim.

This Fuel Tank Cap, part 17251CD000, will fit the following: INFINITI M45. See the What This Fits link for further info.

Fits M45